more rp2040 stuff

new file:   static/doom2/DOOM.WAD

.gitignore

@@ -1 +1 @@
-pos_database.db
+.env

.vscode/launch.json

@@ -0,0 +1,11 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Build SekiPOS (F5)",
+            "type": "node",
+            "request": "launch",
+            "preLaunchTask": "build-sekipos"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "python-envs.defaultEnvManager": "ms-python.python:pyenv"
+}

.vscode/tasks.json

@@ -0,0 +1,15 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build-sekipos",
+            "type": "shell",
+            "command": "docker build -t sekipos:latest .",
+            "group": "build",
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            }
+        }
+    ]
+}

Dockerfile

@@ -2,10 +2,22 @@ FROM python:3.11-slim
 
 WORKDIR /app
 
-COPY requirements.txt ./
-
+# Install dependencies
+COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY . .
+# Copy source code
+COPY app.py .
+COPY templates/ ./templates/
+COPY static/ ./static/
+#COPY .env .
+
+# Create the folder structure for the volume mounts
+RUN mkdir -p /app/static/cache
+
+EXPOSE 5000
+
+# Run with unbuffered output so you can actually see the logs in Portainer
+ENV PYTHONUNBUFFERED=1
 
 CMD ["python", "app.py"]

README.md

@@ -1,2 +1,91 @@
-# SekiPOS
+# SekiPOS v2.1 🍫🥤
 
+A reactive POS inventory system for software engineers with a snack addiction. Features real-time UI updates, automatic product discovery via Open Food Facts, and local image caching.
+
+## 🚀 Features
+- **Real-time UI:** Instant updates via Socket.IO.
+- **Smart Fetch:** Pulls product names/images from Open Food Facts if not found locally.
+- **Local Cache:** Saves images locally to `static/cache` to avoid IP bans.
+- **CLP Ready:** Chilean Peso formatting ($1.234) for local commerce.
+- **Secure:** Hashed password authentication via Flask-Login.
+- **On device scanner:** Add and scan products from within your phone!
+
+## 🐳 Docker Deployment (Server)
+
+Build and run the central inventory server:
+
+```bash
+# Build the image
+docker build -t sekipos:latest .
+
+# Run the container (Map port 5000 and persist the database/cache)
+docker run -d \
+  -p 5000:5000 \
+  -v $(pwd)/sekipos/db:/app/db \
+  -v $(pwd)/sekipos/static/cache:/app/static/cache \
+  --name sekipos-server \
+  --restart unless-stopped \
+  sekipos:latest
+```
+
+Or use this stack:
+```yml
+name: sekipos
+services:
+    sekipos:
+        ports:
+            - 5000:5000
+        volumes:
+            - YOUR_PATH/sekipos/db:/app/db
+            - YOUR_PATH/sekipos/static/cache:/app/static/cache
+        container_name: sekipos-server
+        image: sekipos:latest
+        restart: unless-stopped
+```
+
+## 🔌 Hardware Scanner Bridge (`ScannerGO`)
+
+The server needs a bridge to talk to your physical COM port. Use the `ScannerGO` binary on the machine where the scanner is plugged in.
+
+### 🐧 Linux
+```bash
+chmod +x ScannerGO-linux
+./ScannerGO-linux -port "/dev/ttyACM0" -baud 115200 -url "http://<SERVER_IP>:5000/scan"
+```
+
+### 🪟 Windows
+```powershell
+.\ScannerGO-windows.exe -port "COM3" -baud 115200 -url "http://<SERVER_IP>:5000/scan"
+```
+
+*Note: Ensure the `-url` points to your Docker container's IP address.*
+
+All this program does its send the COM data from the scanner gun to:
+```
+https://scanner.sekidesu.xyz/scan?content=BAR-CODE
+```
+
+## 📦 Local Installation (Development)
+
+If you're too afraid of Docker:
+```bash
+pip install -r requirements.txt
+python app.py
+```
+
+## 🔐 Credentials
+- **Username:** `admin`
+- **Password:** `seki123` (Change this in `app.py` or you'll be hacked by a smart-fridge)
+
+## 📁 Structure
+- `app.py`: The inventory/web server.
+- `static/cache/`: Local repository for product images.
+- `db/pos_database.db`: SQLite storage.
+
+## 📋 TODOs?
+- Some form of user registration(?)
+- Major refactoring of the codebase
+
+## 🥼 Food Datasets
+- https://www.ifpsglobal.com/plu-codes-search
+- https://world.openfoodfacts.org

ScannerGO/main.go

@@ -1,72 +0,0 @@
-package main
-
-import (
-	"flag"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"os"
-	"strings"
-	"time"
-
-	"github.com/tarm/serial"
-)
-
-func main() {
-	portName := flag.String("port", "/dev/ttyACM0", "Serial port name")
-	endpoint := flag.String("url", "https://scanner.sekidesu.xyz/scan", "Target URL endpoint")
-	baudRate := flag.Int("baud", 115200, "Baud rate")
-	flag.Parse()
-
-	config := &serial.Config{
-		Name:        *portName,
-		Baud:        *baudRate,
-		ReadTimeout: time.Second * 2,
-	}
-
-	port, err := serial.OpenPort(config)
-	if err != nil {
-		fmt.Printf("Error opening port %s: %v\n", *portName, err)
-		os.Exit(1)
-	}
-	defer port.Close()
-
-	fmt.Printf("Listening on %s (Baud: %d)...\n", *portName, *baudRate)
-	fmt.Printf("Sending data to: %s\n", *endpoint)
-
-	buf := make([]byte, 128)
-	for {
-		n, err := port.Read(buf)
-		if err != nil {
-			if err != io.EOF {
-				fmt.Printf("Read error: %v\n", err)
-			}
-			continue
-		}
-
-		if n > 0 {
-			content := strings.TrimSpace(string(buf[:n]))
-			if content != "" {
-				sendToEndpoint(*endpoint, content)
-			}
-		}
-	}
-}
-
-func sendToEndpoint(baseURL, content string) {
-	client := &http.Client{
-		Timeout: 5 * time.Second,
-	}
-
-	fullURL := fmt.Sprintf("%s?content=%s", baseURL, url.QueryEscape(content))
-
-	resp, err := client.Get(fullURL)
-	if err != nil {
-		fmt.Printf("Network Error: %v\n", err)
-		return
-	}
-	defer resp.Body.Close()
-
-	fmt.Printf("Data: [%s] | Status: %s\n", content, resp.Status)
-}

app.py

@@ -1,10 +1,24 @@
 import os
 import sqlite3
 import requests
+from flask import send_file
 from flask import Flask, render_template, request, jsonify, redirect, url_for, flash, send_from_directory
 from flask_socketio import SocketIO, emit
 from flask_login import LoginManager, UserMixin, login_user, login_required, logout_user, current_user
 from werkzeug.security import generate_password_hash, check_password_hash
+import mimetypes
+import time
+import uuid
+from datetime import datetime
+import zipfile
+import io
+
+# from dotenv import load_dotenv
+
+# load_dotenv()
+
+# MP_ACCESS_TOKEN = os.getenv('MP_ACCESS_TOKEN')
+# MP_TERMINAL_ID = os.getenv('MP_TERMINAL_ID')
 
 app = Flask(__name__)
 app.config['SECRET_KEY'] = 'seki_super_secret_key_99' # Change this if you have actual friends
@@ -14,7 +28,7 @@ socketio = SocketIO(app, cors_allowed_origins="*")
 login_manager = LoginManager(app)
 login_manager.login_view = 'login'
 
-DB_FILE = 'pos_database.db'
+DB_FILE = 'db/pos_database.db'
 CACHE_DIR = 'static/cache'
 os.makedirs(CACHE_DIR, exist_ok=True)
 
@@ -29,10 +43,41 @@ def init_db():
     with sqlite3.connect(DB_FILE) as conn:
         conn.execute('''CREATE TABLE IF NOT EXISTS users 
                         (id INTEGER PRIMARY KEY, username TEXT UNIQUE, password TEXT)''')
+        # Updated table definition
         conn.execute('''CREATE TABLE IF NOT EXISTS products 
-                        (barcode TEXT PRIMARY KEY, name TEXT, price REAL, image_url TEXT)''')
+                        (barcode TEXT PRIMARY KEY, 
+                         name TEXT, 
+                         price REAL, 
+                         image_url TEXT, 
+                         stock REAL DEFAULT 0, 
+                         unit_type TEXT DEFAULT 'unit')''')
         
-        # Default user: admin / Pass: choripan1234
+        # Add these two tables for sales history
+        conn.execute('''CREATE TABLE IF NOT EXISTS sales 
+                        (id INTEGER PRIMARY KEY AUTOINCREMENT, 
+                         date TEXT DEFAULT CURRENT_TIMESTAMP, 
+                         total REAL, 
+                         payment_method TEXT)''')
+                         
+        conn.execute('''CREATE TABLE IF NOT EXISTS sale_items 
+                        (id INTEGER PRIMARY KEY AUTOINCREMENT, 
+                         sale_id INTEGER, 
+                         barcode TEXT, 
+                         name TEXT, 
+                         price REAL, 
+                         quantity REAL, 
+                         subtotal REAL,
+                         FOREIGN KEY(sale_id) REFERENCES sales(id))''')
+        
+        conn.execute('''CREATE TABLE IF NOT EXISTS dicom 
+                        (id INTEGER PRIMARY KEY AUTOINCREMENT, 
+                         name TEXT UNIQUE, 
+                         amount REAL DEFAULT 0, 
+                         notes TEXT,
+                         image_url TEXT,
+                         last_updated TEXT DEFAULT CURRENT_TIMESTAMP)''')
+        
+        # Default user logic remains same...
         user = conn.execute('SELECT * FROM users WHERE username = ?', ('admin',)).fetchone()
         if not user:
             hashed_pw = generate_password_hash('choripan1234')
@@ -45,20 +90,31 @@ def load_user(user_id):
         user = conn.execute('SELECT id, username FROM users WHERE id = ?', (user_id,)).fetchone()
     return User(user[0], user[1]) if user else None
 
-# --- HELPERS ---
 def download_image(url, barcode):
-    if not url or not url.startswith('http'): return url
-    local_filename = f"{barcode}.jpg"
-    local_path = os.path.join(CACHE_DIR, local_filename)
-    if os.path.exists(local_path): return f"/static/cache/{local_filename}"
+    if not url or not url.startswith('http'): 
+        return url
+        
     try:
-        headers = {'User-Agent': 'SekiPOS/1.0'}
-        r = requests.get(url, headers=headers, stream=True, timeout=5)
-        if r.status_code == 200:
+        headers = {'User-Agent': 'SekiPOS/1.2'}
+        # Use stream=True to check headers before downloading the whole file
+        with requests.get(url, headers=headers, stream=True, timeout=5) as r:
+            r.raise_for_status()
+            
+            # Detect extension from Content-Type header
+            content_type = r.headers.get('content-type')
+            ext = mimetypes.guess_extension(content_type) or '.jpg'
+            
+            local_filename = f"{barcode}{ext}"
+            local_path = os.path.join(CACHE_DIR, local_filename)
+            
+            # Save the file
             with open(local_path, 'wb') as f:
-                for chunk in r.iter_content(1024): f.write(chunk)
+                for chunk in r.iter_content(chunk_size=8192):
+                    f.write(chunk)
+                    
             return f"/static/cache/{local_filename}"
-    except: pass
+    except Exception as e:
+        print(f"Download failed: {e}")
     return url
 
 def fetch_from_openfoodfacts(barcode):
@@ -66,14 +122,20 @@ def fetch_from_openfoodfacts(barcode):
     try:
         headers = {'User-Agent': 'SekiPOS/1.0'}
         resp = requests.get(url, headers=headers, timeout=5).json()
+        
         if resp.get('status') == 1:
             p = resp.get('product', {})
             name = p.get('product_name_es') or p.get('product_name') or p.get('brands', 'Unknown')
             imgs = p.get('selected_images', {}).get('front', {}).get('display', {})
             img_url = imgs.get('es') or imgs.get('en') or p.get('image_url', '')
-            local_img = download_image(img_url, barcode)
-            return {"name": name, "image": local_img}
-    except: pass
+            
+            if img_url:
+                local_img = download_image(img_url, barcode)
+                return {"name": name, "image": local_img}
+            return {"name": name, "image": None}
+            
+    except Exception as e:
+        print(f"API Error: {e}")
     return None
 
 # --- ROUTES ---
@@ -86,33 +148,98 @@ def login():
             user = conn.execute('SELECT * FROM users WHERE username = ?', (user_in,)).fetchone()
         if user and check_password_hash(user[2], pass_in):
             login_user(User(user[0], user[1]))
-            return redirect(url_for('index'))
+            return redirect(url_for('inventory'))
         flash('Invalid credentials.')
     return render_template('login.html')
 
 @app.route('/logout')
 @login_required
 def logout():
-    logout_user(); return redirect(url_for('login'))
+    logout_user()
+    return redirect(url_for('login'))
 
 @app.route('/')
 @login_required
-def index():
+def defaultRoute():
+    return redirect(url_for('inventory'))
+
+@app.route('/inventory')
+@login_required
+def inventory():
     with sqlite3.connect(DB_FILE) as conn:
         products = conn.execute('SELECT * FROM products').fetchall()
-    return render_template('index.html', products=products, user=current_user)
+    return render_template('inventory.html', active_page='inventory', products=products, user=current_user)
 
-@app.route('/upsert', methods=['POST'])
+@app.route("/checkout")
+@login_required
+def checkout():
+    with sqlite3.connect(DB_FILE) as conn:
+        # Fetching the same columns the scanner expects
+        products = conn.execute('SELECT barcode, name, price, image_url, stock, unit_type FROM products').fetchall()
+    return render_template("checkout.html", active_page='checkout', user=current_user, products=products)
+
+@app.route('/dicom')
+@login_required
+def dicom():
+    with sqlite3.connect(DB_FILE) as conn:
+        debtors = conn.execute('SELECT id, name, amount, notes, datetime(last_updated, "localtime"), image_url FROM dicom ORDER BY amount DESC').fetchall()
+    return render_template('dicom.html', active_page='dicom', user=current_user, debtors=debtors)
+
+@app.route('/sales')
+@login_required
+def sales():
+    selected_date = request.args.get('date')
+    with sqlite3.connect(DB_FILE) as conn:
+        cur = conn.cursor()
+        
+        # Determine the target date for the "Daily" stat
+        target_date = selected_date if selected_date else cur.execute("SELECT date('now', 'localtime')").fetchone()[0]
+        
+        stats = {
+            "daily": cur.execute("SELECT SUM(total) FROM sales WHERE date(date, 'localtime') = ?", (target_date,)).fetchone()[0] or 0,
+            "week": cur.execute("SELECT SUM(total) FROM sales WHERE date(date, 'localtime') >= date('now', 'localtime', '-7 days')").fetchone()[0] or 0,
+            "month": cur.execute("SELECT SUM(total) FROM sales WHERE strftime('%Y-%m', date, 'localtime') = strftime('%Y-%m', 'now', 'localtime')").fetchone()[0] or 0
+        }
+        
+        if selected_date:
+            sales_data = cur.execute('''SELECT id, date, total, payment_method FROM sales 
+                                        WHERE date(date, 'localtime') = ? 
+                                        ORDER BY date DESC''', (selected_date,)).fetchall()
+        else:
+            sales_data = cur.execute('SELECT id, date, total, payment_method FROM sales ORDER BY date DESC LIMIT 100').fetchall()
+        
+    return render_template('sales.html', active_page='sales', user=current_user, sales=sales_data, stats=stats, selected_date=selected_date)
+
+
+@app.route("/upsert", methods=["POST"])
 @login_required
 def upsert():
     d = request.form
+    barcode = d['barcode']
+    
+    try:
+        price = float(d['price'])
+        stock = float(d.get('stock', 0)) # New field
+    except (ValueError, TypeError):
+        price = 0.0
+        stock = 0.0
+
+    unit_type = d.get('unit_type', 'unit') # New field (unit or kg)
+    final_image_path = download_image(d['image_url'], barcode)
+    
     with sqlite3.connect(DB_FILE) as conn:
-        conn.execute('''INSERT INTO products (barcode, name, price, image_url) VALUES (?,?,?,?)
-                        ON CONFLICT(barcode) DO UPDATE SET name=excluded.name, 
-                        price=excluded.price, image_url=excluded.image_url''',
-                     (d['barcode'], d['name'], d['price'], d['image_url']))
+        # Updated UPSERT query
+        conn.execute('''INSERT INTO products (barcode, name, price, image_url, stock, unit_type) 
+                        VALUES (?,?,?,?,?,?)
+                        ON CONFLICT(barcode) DO UPDATE SET 
+                        name=excluded.name, 
+                        price=excluded.price, 
+                        image_url=excluded.image_url,
+                        stock=excluded.stock,
+                        unit_type=excluded.unit_type''',
+                     (barcode, d['name'], price, final_image_path, stock, unit_type))
         conn.commit()
-    return redirect(url_for('index'))
+    return redirect(url_for('inventory'))
 
 @app.route('/delete/<barcode>', methods=['POST'])
 @login_required
@@ -124,31 +251,390 @@ def delete(barcode):
     img_p = os.path.join(CACHE_DIR, f"{barcode}.jpg")
     if os.path.exists(img_p): os.remove(img_p)
     socketio.emit('product_deleted', {"barcode": barcode})
-    return redirect(url_for('index'))
+    return redirect(url_for('inventory'))
 
 @app.route('/scan', methods=['GET'])
 def scan():
     barcode = request.args.get('content', '').replace('{content}', '')
-    if not barcode: return jsonify({"err": "empty"}), 400
+    if not barcode: 
+        return jsonify({"status": "error", "message": "empty barcode"}), 400
     
     with sqlite3.connect(DB_FILE) as conn:
-        p = conn.execute('SELECT * FROM products WHERE barcode = ?', (barcode,)).fetchone()
+        # Fixed: Selecting all 6 necessary columns
+        p = conn.execute('SELECT barcode, name, price, image_url, stock, unit_type FROM products WHERE barcode = ?', (barcode,)).fetchone()
     
     if p:
-        socketio.emit('new_scan', {"barcode": p[0], "name": p[1], "price": int(p[2]), "image": p[3]})
-        return jsonify({"status": "ok"})
-    else:
-        ext = fetch_from_openfoodfacts(barcode)
-        if ext:
-            socketio.emit('scan_error', {"barcode": barcode, "name": ext['name'], "image": ext['image']})
-        else:
-            socketio.emit('scan_error', {"barcode": barcode})
-        return jsonify({"status": "not_found"}), 404
+        # Now matches the 6 columns in the SELECT statement
+        barcode_val, name, price, image_path, stock, unit_type = p        
+        
+        if image_path and image_path.startswith('/static/'):
+            clean_path = image_path.split('?')[0].lstrip('/')
+            if not os.path.exists(clean_path):
+                ext_data = fetch_from_openfoodfacts(barcode_val)
+                if ext_data and ext_data.get('image'):
+                    image_path = ext_data['image']
+                    with sqlite3.connect(DB_FILE) as conn:
+                        conn.execute('UPDATE products SET image_url = ? WHERE barcode = ?', (image_path, barcode_val))
+                        conn.commit()
+
+        product_data = {
+            "barcode": barcode_val, 
+            "name": name, 
+            "price": int(price), 
+            "image": image_path,
+            "stock": stock,
+            "unit_type": unit_type
+        }
+        
+        socketio.emit('new_scan', product_data)
+        return jsonify({"status": "ok", "data": product_data}), 200
+    
+    # 2. Product not in DB, try external API
+    ext = fetch_from_openfoodfacts(barcode)
+    if ext:
+        # We found it externally, but it's still a 404 relative to our local DB
+        external_data = {
+            "barcode": barcode, 
+            "name": ext['name'], 
+            "image": ext['image'],
+            "source": "openfoodfacts"
+        }
+        socketio.emit('scan_error', external_data)
+        return jsonify({"status": "not_found", "data": external_data}), 404
+    
+    # 3. Truly not found anywhere
+    socketio.emit('scan_error', {"barcode": barcode})
+    return jsonify({"status": "not_found", "data": {"barcode": barcode}}), 404
 
 @app.route('/static/cache/<path:filename>')
 def serve_cache(filename):
     return send_from_directory(CACHE_DIR, filename)
 
+@app.route('/bulk_price_update', methods=['POST'])
+@login_required
+def bulk_price_update():
+    data = request.get_json()
+    barcodes = data.get('barcodes', [])
+    new_price = data.get('new_price')
+
+    if not barcodes or new_price is None:
+        return jsonify({"error": "Missing data"}), 400
+
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+            # Use executemany for efficiency
+            params = [(float(new_price), b) for b in barcodes]
+            conn.executemany('UPDATE products SET price = ? WHERE barcode = ?', params)
+            conn.commit()
+        return jsonify({"status": "success"}), 200
+    except Exception as e:
+        print(f"Bulk update failed: {e}")
+        return jsonify({"error": str(e)}), 500
+
+@app.route('/bulk_delete', methods=['POST'])
+@login_required
+def bulk_delete():
+    data = request.get_json()
+    barcodes = data.get('barcodes', [])
+
+    if not barcodes:
+        return jsonify({"error": "No barcodes provided"}), 400
+
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+            # Delete records from DB
+            conn.execute(f'DELETE FROM products WHERE barcode IN ({",".join(["?"]*len(barcodes))})', barcodes)
+            conn.commit()
+        
+        # Clean up cache for each deleted product
+        for barcode in barcodes:
+            # This is a bit naive as it only checks .jpg, but matches your existing delete logic
+            img_p = os.path.join(CACHE_DIR, f"{barcode}.jpg")
+            if os.path.exists(img_p): 
+                os.remove(img_p)
+                
+        return jsonify({"status": "success"}), 200
+    except Exception as e:
+        print(f"Bulk delete failed: {e}")
+        return jsonify({"error": str(e)}), 500
+
+@app.route('/upload_image', methods=['POST'])
+@login_required
+def upload_image():
+    if 'image' not in request.files or 'barcode' not in request.form:
+        return jsonify({"error": "Missing data"}), 400
+    file = request.files['image']
+    barcode = request.form['barcode']
+    if file.filename == '' or not barcode:
+        return jsonify({"error": "Invalid data"}), 400
+
+    filename = f"{barcode}.jpg"
+    filepath = os.path.join(CACHE_DIR, filename)
+    file.save(filepath)
+    timestamp = int(time.time())
+    return jsonify({"status": "success", "image_url": f"/static/cache/{filename}?t={timestamp}"}), 200
+
+@app.route('/api/scale/weight', methods=['POST'])
+def update_scale_weight():
+    data = request.get_json()
+    
+    # Assuming the scale sends {"weight": 1250} (in grams)
+    weight_grams = data.get('weight', 0)
+    
+    # Optional: Convert to kg if you prefer
+    weight_kg = round(weight_grams / 1000, 3)
+
+    # Broadcast to all connected clients via SocketIO
+    socketio.emit('scale_update', {
+        "grams": weight_grams,
+        "kilograms": weight_kg,
+        "timestamp": time.time()
+    })
+    
+    return jsonify({"status": "received"}), 200
+
+
+@app.route('/api/checkout', methods=['POST'])
+@login_required
+def process_checkout():
+    try:
+        data = request.get_json()
+        cart = data.get('cart', [])
+        payment_method = data.get('payment_method', 'efectivo')
+        
+        if not cart:
+            return jsonify({"error": "Cart is empty"}), 400
+            
+        # Recalculate total on the server because the frontend is a liar
+        total = sum(item.get('subtotal', 0) for item in cart)
+        
+        with sqlite3.connect(DB_FILE) as conn:
+            cur = conn.cursor()
+            
+            # Let SQLite handle the exact UTC timestamp internally
+            cur.execute('INSERT INTO sales (date, total, payment_method) VALUES (CURRENT_TIMESTAMP, ?, ?)', (total, payment_method))
+            sale_id = cur.lastrowid
+            
+            # Record each item and deduct stock
+            for item in cart:
+                cur.execute('''INSERT INTO sale_items (sale_id, barcode, name, price, quantity, subtotal)
+                               VALUES (?, ?, ?, ?, ?, ?)''', 
+                            (sale_id, item['barcode'], item['name'], item['price'], item['qty'], item['subtotal']))
+                
+                # Deduct from inventory (Manual products will safely be ignored here)
+                cur.execute('UPDATE products SET stock = stock - ? WHERE barcode = ?', (item['qty'], item['barcode']))
+                
+            conn.commit()
+            
+        return jsonify({"status": "success", "sale_id": sale_id}), 200
+        
+    except Exception as e:
+        print(f"Checkout Error: {e}")
+        return jsonify({"error": str(e)}), 500
+    
+@app.route('/api/sale/<int:sale_id>')
+@login_required
+def get_sale_details(sale_id):
+    with sqlite3.connect(DB_FILE) as conn:
+        items = conn.execute('SELECT barcode, name, price, quantity, subtotal FROM sale_items WHERE sale_id = ?', (sale_id,)).fetchall()
+        
+    # Format it as a neat list of dictionaries for JavaScript to digest
+    item_list = [{"barcode": i[0], "name": i[1], "price": i[2], "qty": i[3], "subtotal": i[4]} for i in items]
+    return jsonify(item_list), 200
+
+@app.route('/api/sale/<int:sale_id>', methods=['DELETE'])
+@login_required
+def reverse_sale(sale_id):
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+            cur = conn.cursor()
+            
+            # 1. Get the items and quantities from the receipt
+            items = cur.execute('SELECT barcode, quantity FROM sale_items WHERE sale_id = ?', (sale_id,)).fetchall()
+            
+            # 2. Add the stock back to the inventory
+            for barcode, qty in items:
+                # This safely ignores manual products since their fake barcodes won't match any row
+                cur.execute('UPDATE products SET stock = stock + ? WHERE barcode = ?', (qty, barcode))
+                
+            # 3. Destroy the evidence
+            cur.execute('DELETE FROM sale_items WHERE sale_id = ?', (sale_id,))
+            cur.execute('DELETE FROM sales WHERE id = ?', (sale_id,))
+            
+            conn.commit()
+            
+        return jsonify({"status": "success"}), 200
+        
+    except Exception as e:
+        print(f"Reverse Sale Error: {e}")
+        return jsonify({"error": str(e)}), 500
+    
+
+
+@app.route('/api/dicom/update', methods=['POST'])
+@login_required
+def update_dicom():
+    data = request.get_json()
+    name = data.get('name', '').strip()
+    amount = float(data.get('amount', 0))
+    notes = data.get('notes', '')
+    image_url = data.get('image_url', '')
+    action = data.get('action')
+    
+    if not name or amount <= 0:
+        return jsonify({"error": "Nombre y monto válidos son requeridos"}), 400
+        
+    if action == 'add':
+        amount = -amount
+
+    with sqlite3.connect(DB_FILE) as conn:
+        cur = conn.cursor()
+        cur.execute('''INSERT INTO dicom (name, amount, notes, image_url, last_updated) 
+                           VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP)
+                           ON CONFLICT(name) DO UPDATE SET 
+                           amount = amount + excluded.amount,
+                           notes = excluded.notes,
+                           image_url = CASE WHEN excluded.image_url != "" THEN excluded.image_url ELSE dicom.image_url END,
+                           last_updated = CURRENT_TIMESTAMP''', (name, amount, notes, image_url))
+        conn.commit()
+    return jsonify({"status": "success"}), 200
+
+@app.route('/api/dicom/<int:debtor_id>', methods=['DELETE'])
+@login_required
+def delete_dicom(debtor_id):
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+            conn.execute('DELETE FROM dicom WHERE id = ?', (debtor_id,))
+            conn.commit()
+        return jsonify({"status": "success"}), 200
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+    
+@app.route('/settings/update', methods=['POST'])
+@login_required
+def update_settings():
+    new_password = request.form.get('password')
+    profile_pic = request.form.get('profile_pic')
+    
+    with sqlite3.connect(DB_FILE) as conn:
+        if new_password and len(new_password) > 0:
+            hashed_pw = generate_password_hash(new_password)
+            conn.execute('UPDATE users SET password = ? WHERE id = ?', (hashed_pw, current_user.id))
+        
+        if profile_pic:
+            conn.execute('UPDATE users SET profile_pic = ? WHERE id = ?', (profile_pic, current_user.id))
+        conn.commit()
+    
+    flash('Configuración actualizada')
+    return redirect(request.referrer)
+
+@app.route('/export/db')
+@login_required
+def export_db():
+    if os.path.exists(DB_FILE):
+        return send_file(DB_FILE, as_attachment=True, download_name=f"SekiPOS_Backup_{datetime.now().strftime('%Y%m%d')}.db", mimetype='application/x-sqlite3')
+    return "Error: Database file not found", 404
+
+@app.route('/export/images')
+@login_required
+def export_images():
+    if not os.path.exists(CACHE_DIR) or not os.listdir(CACHE_DIR):
+        return "No images found to export", 404
+
+    # Create an in-memory byte stream to hold the zip data
+    memory_file = io.BytesIO()
+    
+    with zipfile.ZipFile(memory_file, 'w', zipfile.ZIP_DEFLATED) as zf:
+        for root, dirs, files in os.walk(CACHE_DIR):
+            for file in files:
+                file_path = os.path.join(root, file)
+                # Store files using their names only to avoid nesting inside the zip
+                zf.write(file_path, arcname=file)
+    
+    memory_file.seek(0)
+    
+    return send_file(
+        memory_file,
+        mimetype='application/zip',
+        as_attachment=True,
+        download_name=f"SekiPOS_Images_{datetime.now().strftime('%Y%m%d')}.zip"
+    )
+
+# @app.route('/process_payment', methods=['POST'])
+# @login_required
+# def process_payment():
+#     data = request.get_json()
+#     total_amount = data.get('total')
+    
+#     if not total_amount or total_amount <= 0:
+#         return jsonify({"error": "Invalid amount"}), 400
+
+#     url = "https://api.mercadopago.com/v1/orders"
+    
+#     headers = {
+#         "Authorization": f"Bearer {MP_ACCESS_TOKEN}",
+#         "Content-Type": "application/json",
+#         "X-Idempotency-Key": str(uuid.uuid4())
+#     }
+    
+#     # MP Point API often prefers integer strings for CLP or exact strings
+#     # We use int() here if you are dealing with CLP (no cents)
+#     formatted_amount = str(int(float(total_amount)))
+
+#     payload = {
+#         "type": "point",
+#         "external_reference": f"ref_{int(time.time())}",
+#         "description": "Venta SekiPOS",
+#         "expiration_time": "PT16M",
+#         "transactions": {
+#             "payments": [
+#                 {
+#                     "amount": formatted_amount
+#                 }
+#             ]
+#         },
+#         "config": {
+#             "point": {
+#                 "terminal_id": MP_TERMINAL_ID,
+#                 "print_on_terminal": "no_ticket"
+#             },
+#             "payment_method": {
+#                 "default_type": "credit_card"
+#             }
+#         },
+#         "integration_data": {
+#             "platform_id": "dev_1234567890",
+#             "integrator_id": "dev_1234567890"
+#         },
+#         "taxes": [
+#             {
+#                 "payer_condition": "payment_taxable_iva"
+#             }
+#         ]
+#     }
+
+#     try:
+#         # Verify the payload in your terminal if it fails again
+#         response = requests.post(url, json=payload, headers=headers)
+        
+#         if response.status_code != 201 and response.status_code != 200:
+#             print(f"DEBUG MP ERROR: {response.text}")
+            
+#         return jsonify(response.json()), response.status_code
+#     except Exception as e:
+#         return jsonify({"error": str(e)}), 500
+
+# @app.route('/api/mp-webhook', methods=['POST'])
+# def webhook_notify():
+#     data = request.get_json()
+#     action = data.get('action', 'unknown')
+#     # Emitimos a todos los clientes conectados
+#     socketio.emit('payment_update', {
+#         "status": action,
+#         "id": data.get('data', {}).get('id')
+#     })
+#     return jsonify({"status": "ok"}), 200
+
 if __name__ == '__main__':
     init_db()
-    socketio.run(app, host='0.0.0.0', port=5000, debug=True)
+    socketio.run(app, host='0.0.0.0', port=5000, debug=True)

db/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

extensions/go/DataToolsGO/.gitignore

@@ -0,0 +1,2 @@
+config.json
+imageTools-*

extensions/go/DataToolsGO/build.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Define binary names
+LINUX_BIN="imageTools-linux"
+LINUX_ARM_BIN="imageTools-linuxARMv7"
+WINDOWS_BIN="imageTools-windows.exe"
+
+echo "Starting build process..."
+
+# Build for Linux (64-bit)
+echo "Building for Linux..."
+GOOS=linux GOARCH=amd64 go build -o "$LINUX_BIN" main.go
+
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $LINUX_BIN"
+else
+    echo "Failed to build Linux binary"
+    exit 1
+fi
+
+# Build for Windows (64-bit)
+echo "Building for Windows..."
+GOOS=windows GOARCH=amd64 go build -o "$WINDOWS_BIN" main.go
+
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $WINDOWS_BIN"
+else
+    echo "Failed to build Windows binary"
+    exit 1
+fi
+
+# Build for Linux ARM (ARMv7)
+echo "Building for Linux ARMv7..."
+GOOS=linux GOARCH=arm GOARM=7 go build -o "$LINUX_ARM_BIN" main.go
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $LINUX_ARM_BIN"
+else
+    echo "Failed to build Linux ARMv7 binary"
+    exit 1
+fi
+
+echo "Build complete."

extensions/go/DataToolsGO/go.mod

@@ -0,0 +1,5 @@
+module dataTools
+
+go 1.25.7
+
+require github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646

extensions/go/DataToolsGO/go.sum

@@ -0,0 +1,2 @@
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=

extensions/go/DataToolsGO/main.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"image"
+	"image/jpeg"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/nfnt/resize"
+)
+
+func main() {
+	// Command line arguments
+	dirPath := flag.String("dir", "./", "Directory containing images")
+	maxWidth := flag.Uint("width", 1000, "Maximum width for resizing")
+	quality := flag.Int("quality", 75, "JPEG quality (1-100)")
+	flag.Parse()
+
+	files, err := os.ReadDir(*dirPath)
+	if err != nil {
+		fmt.Printf("Error reading directory: %v\n", err)
+		return
+	}
+
+	fmt.Printf("Processing images in %s (Max Width: %d, Quality: %d)\n", *dirPath, *maxWidth, *quality)
+
+	for _, file := range files {
+		if file.IsDir() {
+			continue
+		}
+
+		ext := strings.ToLower(filepath.Ext(file.Name()))
+		if ext != ".jpg" && ext != ".jpeg" && ext != ".png" {
+			continue
+		}
+
+		filePath := filepath.Join(*dirPath, file.Name())
+		processImage(filePath, *maxWidth, *quality)
+	}
+
+	fmt.Println("Done. Your storage can finally breathe again.")
+}
+
+func processImage(path string, maxWidth uint, quality int) {
+	file, err := os.Open(path)
+	if err != nil {
+		fmt.Printf("Failed to open %s: %v\n", path, err)
+		return
+	}
+
+	img, _, err := image.Decode(file)
+	file.Close()
+	if err != nil {
+		fmt.Printf("Failed to decode %s: %v\n", path, err)
+		return
+	}
+
+	// Only resize if original is wider than maxWidth
+	bounds := img.Bounds()
+	var finalImg image.Image
+	if uint(bounds.Dx()) > maxWidth {
+		finalImg = resize.Resize(maxWidth, 0, img, resize.Lanczos3)
+		fmt.Printf("Resized and compressed: %s\n", filepath.Base(path))
+	} else {
+		finalImg = img
+		fmt.Printf("Compressed (no resize needed): %s\n", filepath.Base(path))
+	}
+
+	// Overwrite the original file
+	out, err := os.Create(path)
+	if err != nil {
+		fmt.Printf("Failed to create output file %s: %v\n", path, err)
+		return
+	}
+	defer out.Close()
+
+	err = jpeg.Encode(out, finalImg, &jpeg.Options{Quality: quality})
+	if err != nil {
+		fmt.Printf("Failed to encode %s: %v\n", path, err)
+	}
+}

extensions/go/MPStudyGO/go.mod

@@ -0,0 +1,8 @@
+module MPPOS
+
+go 1.25.7
+
+require (
+	github.com/google/uuid v1.6.0
+	github.com/joho/godotenv v1.5.1
+)

extensions/go/MPStudyGO/go.sum

@@ -0,0 +1,4 @@
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=

extensions/go/MPStudyGO/main.go

@@ -0,0 +1,143 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/joho/godotenv"
+)
+
+// Request structures based on MP documentation
+type PrintRequest struct {
+	Type              string      `json:"type"`
+	ExternalReference string      `json:"external_reference"`
+	Config            PrintConfig `json:"config"`
+	Content           string      `json:"content"`
+}
+
+type PrintConfig struct {
+	Point PointSettings `json:"point"`
+}
+
+type PointSettings struct {
+	TerminalID string `json:"terminal_id"`
+	Subtype    string `json:"subtype"`
+}
+
+func main() {
+	err := godotenv.Load("../.env")
+	if err != nil {
+		fmt.Println("Error loading .env file")
+	}
+
+	// Example receipt using supported tags: {b}, {center}, {br}, {s}
+	receiptContent := "{center}{b}SEKIPOS VENTA{/b}{br}" +
+		"--------------------------------{br}" +
+		"{left}Producto: Choripan Premium{br}" +
+		"{left}Total: $5.500{br}" +
+		"--------------------------------{br}" +
+		"{center}{s}Gracias por su compra{/s}{br}"
+
+	resp, err := SendPrintAction(receiptContent)
+	if err != nil {
+		fmt.Printf("Error: %v\n", err)
+		return
+	}
+	fmt.Printf("Response: %s\n", resp)
+}
+
+func SendPrintAction(content string) (string, error) {
+	apiURL := "https://api.mercadopago.com/terminals/v1/actions"
+	accessToken := os.Getenv("MP_ACCESS_TOKEN")
+	terminalID := os.Getenv("MP_TERMINAL_ID")
+
+	payload := PrintRequest{
+		Type:              "print", // Required
+		ExternalReference: fmt.Sprintf("ref_%d", time.Now().Unix()),
+		Config: PrintConfig{
+			Point: PointSettings{
+				TerminalID: terminalID,
+				Subtype:    "custom", // For text with tags
+			},
+		},
+		Content: content, // Must be 100-4096 chars
+	}
+
+	jsonData, _ := json.Marshal(payload)
+
+	req, _ := http.NewRequest("POST", apiURL, bytes.NewBuffer(jsonData))
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	// Mandatory Unique UUID V4
+	req.Header.Set("X-Idempotency-Key", uuid.New().String())
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	body, _ := io.ReadAll(resp.Body)
+
+	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("MP Error %d: %s", resp.StatusCode, string(body))
+	}
+
+	return string(body), nil
+}
+
+func PartialRefund(orderID string, paymentID string, amount string) (string, error) {
+	// Endpoint para reembolsos según la referencia de API
+	apiURL := fmt.Sprintf("https://api.mercadopago.com/v1/orders/%s/refund", orderID)
+	token := os.Getenv("MP_ACCESS_TOKEN")
+
+	payload := map[string]interface{}{
+		"transactions": []map[string]string{
+			{
+				"id":     paymentID,
+				"amount": amount, // Debe ser un string sin decimales
+			},
+		},
+	}
+
+	body, _ := json.Marshal(payload)
+	req, _ := http.NewRequest("POST", apiURL, bytes.NewBuffer(body))
+	req.Header.Set("Authorization", "Bearer "+token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-Idempotency-Key", uuid.New().String())
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	resBody, _ := io.ReadAll(resp.Body)
+	return string(resBody), nil
+}
+
+func GetOrderStatus(orderID string) (string, error) {
+	apiURL := fmt.Sprintf("https://api.mercadopago.com/v1/orders/%s", orderID)
+	token := os.Getenv("MP_ACCESS_TOKEN")
+
+	req, _ := http.NewRequest("GET", apiURL, nil)
+	req.Header.Set("Authorization", "Bearer "+token)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	resBody, _ := io.ReadAll(resp.Body)
+	return string(resBody), nil
+}

extensions/go/ScannerCOM/.gitignore

@@ -0,0 +1,2 @@
+config.json
+COMScannerGO-*

extensions/go/ScannerCOM/build.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Define binary names
+LINUX_BIN="COMScannerGO-linux"
+LINUX_ARM_BIN="COMScannerGO-linuxARMv7"
+WINDOWS_BIN="COMScannerGO-windows.exe"
+
+echo "Starting build process..."
+
+# Build for Linux (64-bit)
+echo "Building for Linux..."
+GOOS=linux GOARCH=amd64 go build -o "$LINUX_BIN" main.go
+
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $LINUX_BIN"
+else
+    echo "Failed to build Linux binary"
+    exit 1
+fi
+
+# Build for Windows (64-bit)
+echo "Building for Windows..."
+GOOS=windows GOARCH=amd64 go build -o "$WINDOWS_BIN" main.go
+
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $WINDOWS_BIN"
+else
+    echo "Failed to build Windows binary"
+    exit 1
+fi
+
+# Build for Linux ARM (ARMv7)
+echo "Building for Linux ARMv7..."
+GOOS=linux GOARCH=arm GOARM=7 go build -o "$LINUX_ARM_BIN" main.go
+if [ $? -eq 0 ]; then
+    echo "Successfully built: $LINUX_ARM_BIN"
+else
+    echo "Failed to build Linux ARMv7 binary"
+    exit 1
+fi
+
+echo "Build complete."

extensions/go/ScannerCOM/go.mod

@@ -1,6 +1,6 @@
 module ScannerGO
 
-go 1.25.7
+go 1.24.0
 
 require github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07
 

extensions/go/ScannerCOM/main.go

@@ -0,0 +1,175 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/tarm/serial"
+)
+
+type Config struct {
+	Port        string `json:"port"`
+	URL         string `json:"url"`
+	BaudRate    int    `json:"baud"`
+	Delimiter   string `json:"delimiter"`
+	FlowControl string `json:"flow_control"`
+}
+
+var defaultConfig = Config{
+	Port:        "/dev/ttyACM0",
+	URL:         "https://scanner.sekidesu.xyz/scan",
+	BaudRate:    115200,
+	Delimiter:   "\n",
+	FlowControl: "none",
+}
+
+const configPath = "config.json"
+
+func main() {
+	cfg := loadConfig()
+
+	portName := flag.String("port", cfg.Port, "Serial port name")
+	endpoint := flag.String("url", cfg.URL, "Target URL endpoint")
+	baudRate := flag.Int("baud", cfg.BaudRate, "Baud rate")
+	delim := flag.String("delim", cfg.Delimiter, "Line delimiter")
+	flow := flag.String("flow", cfg.FlowControl, "Flow control: none, hardware, software")
+	save := flag.Bool("save", false, "Save current parameters to config.json")
+	flag.Parse()
+
+	cfg.Port = *portName
+	cfg.URL = *endpoint
+	cfg.BaudRate = *baudRate
+	cfg.Delimiter = *delim
+	cfg.FlowControl = *flow
+
+	if *save {
+		saveConfig(cfg)
+		fmt.Println("Settings saved to", configPath)
+	}
+
+	serialConfig := &serial.Config{
+		Name:        cfg.Port,
+		Baud:        cfg.BaudRate,
+		ReadTimeout: time.Millisecond * 500,
+	}
+
+	// tarm/serial uses boolean flags for flow control if available in the version used
+	// If your version doesn't support these fields, you may need to update the package
+	// or manage the lines manually via the file descriptor.
+	/* Note: tarm/serial usually requires specific fork or version
+	   for full RTS/CTS hardware flow control support.
+	*/
+
+	port, err := serial.OpenPort(serialConfig)
+	if err != nil {
+		fmt.Printf("Error opening port %s: %v\n", cfg.Port, err)
+		os.Exit(1)
+	}
+	defer port.Close()
+
+	fmt.Printf("Listening on %s (Baud: %d, Flow: %s)...\n", cfg.Port, cfg.BaudRate, cfg.FlowControl)
+
+	scanner := bufio.NewScanner(port)
+
+	scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
+		if atEOF && len(data) == 0 {
+			return 0, nil, nil
+		}
+		if i := bytes.Index(data, []byte(cfg.Delimiter)); i >= 0 {
+			return i + len(cfg.Delimiter), data[0:i], nil
+		}
+		if atEOF {
+			return len(data), data, nil
+		}
+		return 0, nil, nil
+	})
+
+	for scanner.Scan() {
+		rawContent := scanner.Text()
+		content := strings.TrimFunc(rawContent, func(r rune) bool {
+			return r < 32 || r > 126
+		})
+
+		if content != "" {
+			sendToEndpoint(cfg.URL, content)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		fmt.Printf("Scanner error: %v\n", err)
+	}
+}
+
+func loadConfig() Config {
+	if _, err := os.Stat(configPath); os.IsNotExist(err) {
+		saveConfig(defaultConfig)
+		return defaultConfig
+	}
+
+	file, err := os.Open(configPath)
+	if err != nil {
+		return defaultConfig
+	}
+	defer file.Close()
+
+	var cfg Config
+	decoder := json.NewDecoder(file)
+	if err := decoder.Decode(&cfg); err != nil {
+		return defaultConfig
+	}
+	if cfg.Delimiter == "" {
+		cfg.Delimiter = "\n"
+	}
+	if cfg.FlowControl == "" {
+		cfg.FlowControl = "none"
+	}
+	return cfg
+}
+
+func saveConfig(cfg Config) {
+	file, err := os.Create(configPath)
+	if err != nil {
+		fmt.Printf("Failed to create/save config: %v\n", err)
+		return
+	}
+	defer file.Close()
+
+	encoder := json.NewEncoder(file)
+	encoder.SetIndent("", "  ")
+	encoder.Encode(cfg)
+}
+
+func sendToEndpoint(baseURL, content string) {
+	client := &http.Client{
+		Timeout: 5 * time.Second,
+	}
+
+	fullURL := fmt.Sprintf("%s?content=%s", baseURL, url.QueryEscape(content))
+	resp, err := client.Get(fullURL)
+	if err != nil {
+		fmt.Printf("Network Error: %v\n", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Printf("Error reading response: %v\n", err)
+		return
+	}
+
+	fmt.Printf("Data: [%s] | Status: %s\n", content, resp.Status)
+	if len(body) > 0 {
+		fmt.Printf("Response: %s\n", string(body))
+	}
+	fmt.Println(strings.Repeat("-", 30))
+}

extensions/go/ScannerHID/.gitignore

@@ -0,0 +1,2 @@
+config.json
+HIDScannerGO-*

extensions/go/ScannerHID/build.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+LINUX_BIN="HIDScannerGO-linux"
+WINDOWS_BIN="HIDScannerGO-windows.exe"
+
+echo "Starting build process..."
+
+# 1. Build for Linux (Host)
+echo "Building for Linux (64-bit)..."
+CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -o "$LINUX_BIN" .
+
+# 2. Build for Windows (Needs MinGW)
+echo "Building for Windows (64-bit)..."
+# We must point to the mingw gcc and enable CGO
+CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc \
+go build -ldflags="-H=windowsgui" -o "$WINDOWS_BIN" .
+
+echo "Build complete."

extensions/go/ScannerHID/go.mod

@@ -0,0 +1,46 @@
+module ScannerGO
+
+go 1.24.0
+
+require (
+	fyne.io/fyne/v2 v2.7.3
+	gioui.org v0.9.0
+	github.com/google/gousb v1.1.3
+)
+
+require (
+	fyne.io/systray v1.12.0 // indirect
+	gioui.org/shader v1.0.8 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fredbi/uri v1.1.1 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/fyne-io/gl-js v0.2.0 // indirect
+	github.com/fyne-io/glfw-js v0.3.0 // indirect
+	github.com/fyne-io/image v0.1.1 // indirect
+	github.com/fyne-io/oksvg v0.2.0 // indirect
+	github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 // indirect
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20240506104042-037f3cc74f2a // indirect
+	github.com/go-text/render v0.2.0 // indirect
+	github.com/go-text/typesetting v0.3.3 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/hack-pad/go-indexeddb v0.3.2 // indirect
+	github.com/hack-pad/safejs v0.1.0 // indirect
+	github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade // indirect
+	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
+	github.com/nicksnyder/go-i18n/v2 v2.5.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rymdport/portal v0.4.2 // indirect
+	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
+	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/yuin/goldmark v1.7.8 // indirect
+	golang.org/x/exp/shiny v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
+	golang.org/x/image v0.26.0 // indirect
+	golang.org/x/net v0.35.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
+	golang.org/x/text v0.24.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

extensions/go/ScannerHID/go.sum

@@ -0,0 +1,93 @@
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d h1:ARo7NCVvN2NdhLlJE9xAbKweuI9L6UgfTbYb0YwPacY=
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d/go.mod h1:OYVuxibdk9OSLX8vAqydtRPP87PyTFcT9uH3MlEGBQA=
+fyne.io/fyne/v2 v2.7.3 h1:xBT/iYbdnNHONWO38fZMBrVBiJG8rV/Jypmy4tVfRWE=
+fyne.io/fyne/v2 v2.7.3/go.mod h1:gu+dlIcZWSzKZmnrY8Fbnj2Hirabv2ek+AKsfQ2bBlw=
+fyne.io/systray v1.12.0 h1:CA1Kk0e2zwFlxtc02L3QFSiIbxJ/P0n582YrZHT7aTM=
+fyne.io/systray v1.12.0/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs=
+gioui.org v0.9.0 h1:4u7XZwnb5kzQW91Nz/vR0wKD6LdW9CaVF96r3rfy4kc=
+gioui.org v0.9.0/go.mod h1:CjNig0wAhLt9WZxOPAusgFD8x8IRvqt26LdDBa3Jvao=
+gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/shader v1.0.8 h1:6ks0o/A+b0ne7RzEqRZK5f4Gboz2CfG+mVliciy6+qA=
+gioui.org/shader v1.0.8/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
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+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

extensions/go/ScannerHID/main.go

@@ -0,0 +1,281 @@
+package main
+
+import (
+	_ "embed"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"image/color"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/app"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/widget"
+	"github.com/google/gousb"
+)
+
+//go:embed icon.ico
+var iconData []byte
+
+type HexUint16 uint16
+
+func (h HexUint16) MarshalJSON() ([]byte, error) {
+	return json.Marshal(fmt.Sprintf("0x%04X", h))
+}
+
+func (h *HexUint16) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	s = strings.TrimPrefix(s, "0x")
+	val, err := strconv.ParseUint(s, 16, 16)
+	if err != nil {
+		return err
+	}
+	*h = HexUint16(val)
+	return nil
+}
+
+type Config struct {
+	TargetURL   string    `json:"target_url"`
+	VendorID    HexUint16 `json:"vendor_id"`
+	ProductID   HexUint16 `json:"product_id"`
+	FallbackVID HexUint16 `json:"fallback_vendor_id"`
+	FallbackPID HexUint16 `json:"fallback_product_id"`
+}
+
+var hidMap = map[byte]string{
+	4: "a", 5: "b", 6: "c", 7: "d", 8: "e", 9: "f", 10: "g", 11: "h", 12: "i",
+	13: "j", 14: "k", 15: "l", 16: "m", 17: "n", 18: "o", 19: "p", 20: "q",
+	21: "r", 22: "s", 23: "t", 24: "u", 25: "v", 26: "w", 27: "x", 28: "y", 29: "z",
+	30: "1", 31: "2", 32: "3", 33: "4", 34: "5", 35: "6", 36: "7", 37: "8", 38: "9", 39: "0",
+	44: " ", 45: "-", 46: "=", 55: ".", 56: "/",
+}
+
+type BridgeApp struct {
+	urlEntry *widget.Entry
+	status   *canvas.Text
+	logList  *widget.List
+	logs     []string
+	window   fyne.Window
+	config   Config
+	isCLI    bool
+}
+
+func (b *BridgeApp) saveConfig() {
+	b.config.TargetURL = b.urlEntry.Text
+	data, _ := json.MarshalIndent(b.config, "", "  ")
+	_ = os.WriteFile("config.json", data, 0644)
+}
+
+func loadConfig() Config {
+	conf := Config{
+		TargetURL:   "https://scanner.sekidesu.xyz/scan",
+		VendorID:    0xFFFF,
+		ProductID:   0x0035,
+		FallbackVID: 0x04B3,
+		FallbackPID: 0x3107,
+	}
+	file, err := os.ReadFile("config.json")
+	if err == nil {
+		json.Unmarshal(file, &conf)
+	} else {
+		data, _ := json.MarshalIndent(conf, "", "  ")
+		os.WriteFile("config.json", data, 0644)
+	}
+	return conf
+}
+
+func main() {
+	cliMode := flag.Bool("cli", false, "Run in CLI mode without GUI")
+	flag.Parse()
+
+	conf := loadConfig()
+	bridge := &BridgeApp{
+		config: conf,
+		isCLI:  *cliMode,
+	}
+
+	if *cliMode {
+		fmt.Println("Running in CLI mode...")
+		bridge.usbListenLoop()
+		return
+	}
+
+	a := app.New()
+	w := a.NewWindow("POS Hardware Bridge (Go)")
+	w.SetIcon(fyne.NewStaticResource("icon.ico", iconData))
+
+	bridge.window = w
+	bridge.urlEntry = widget.NewEntry()
+	bridge.urlEntry.SetText(conf.TargetURL)
+	bridge.status = canvas.NewText("Status: Booting...", color.Black)
+	bridge.status.TextSize = 14
+
+	bridge.logList = widget.NewList(
+		func() int { return len(bridge.logs) },
+		func() fyne.CanvasObject { return widget.NewLabel("template") },
+		func(i widget.ListItemID, o fyne.CanvasObject) {
+			o.(*widget.Label).SetText(bridge.logs[i])
+		},
+	)
+
+	content := container.NewBorder(
+		container.NewVBox(
+			widget.NewLabel("Target POS Endpoint:"),
+			bridge.urlEntry,
+			bridge.status,
+			widget.NewLabel("Activity Log:"),
+		),
+		nil, nil, nil,
+		bridge.logList,
+	)
+
+	w.SetContent(content)
+	w.Resize(fyne.NewSize(500, 400))
+
+	w.SetOnClosed(func() {
+		if !bridge.isCLI {
+			bridge.config.TargetURL = bridge.urlEntry.Text
+			data, err := json.MarshalIndent(bridge.config, "", "  ")
+			if err == nil {
+				_ = os.WriteFile("config.json", data, 0644)
+				fmt.Println("Configuration saved.")
+			}
+		}
+	})
+
+	go bridge.usbListenLoop()
+	w.ShowAndRun()
+}
+
+func (b *BridgeApp) addLog(msg string) {
+	ts := time.Now().Format("15:04:05")
+	formatted := fmt.Sprintf("[%s] %s", ts, msg)
+
+	if b.isCLI {
+		fmt.Println(formatted)
+		return
+	}
+
+	fyne.DoAndWait(func() {
+		b.logs = append([]string{formatted}, b.logs...)
+		if len(b.logs) > 15 {
+			b.logs = b.logs[:15]
+		}
+		b.logList.Refresh()
+	})
+}
+
+func (b *BridgeApp) updateStatus(msg string, col color.Color) {
+	if b.isCLI {
+		fmt.Printf("STATUS: %s\n", msg)
+		return
+	}
+	fyne.DoAndWait(func() {
+		b.status.Text = msg
+		b.status.Color = col
+		b.status.Refresh()
+	})
+}
+
+func (b *BridgeApp) sendToPos(barcode string) {
+	url := b.config.TargetURL
+	if !b.isCLI {
+		url = b.urlEntry.Text
+	}
+
+	b.addLog(fmt.Sprintf("Captured: %s. Sending to %s", barcode, url))
+	client := http.Client{Timeout: 3 * time.Second}
+	resp, err := client.Get(url + "?content=" + barcode)
+	if err != nil {
+		b.addLog("HTTP Error: Backend unreachable")
+		return
+	}
+	defer resp.Body.Close()
+	b.addLog(fmt.Sprintf("Success: POS returned %d", resp.StatusCode))
+}
+
+func (b *BridgeApp) usbListenLoop() {
+	ctx := gousb.NewContext()
+	defer ctx.Close()
+
+	for {
+		dev, err := ctx.OpenDeviceWithVIDPID(gousb.ID(b.config.VendorID), gousb.ID(b.config.ProductID))
+
+		if (err != nil || dev == nil) && (b.config.FallbackVID != 0) {
+			dev, err = ctx.OpenDeviceWithVIDPID(gousb.ID(b.config.FallbackVID), gousb.ID(b.config.FallbackPID))
+		}
+
+		if err != nil || dev == nil {
+			b.updateStatus("Scanner unplugged. Waiting...", color.NRGBA{200, 0, 0, 255})
+			time.Sleep(2 * time.Second)
+			continue
+		}
+
+		b.updateStatus(fmt.Sprintf("Scanner Ready (0x%04X)", dev.Desc.Vendor), color.NRGBA{0, 180, 0, 255})
+
+		intf, done, err := dev.DefaultInterface()
+		if err != nil {
+			b.addLog("Error claiming interface")
+			dev.Close()
+			time.Sleep(2 * time.Second)
+			continue
+		}
+
+		var inEp *gousb.InEndpoint
+		for _, epDesc := range intf.Setting.Endpoints {
+			if epDesc.Direction == gousb.EndpointDirectionIn {
+				inEp, _ = intf.InEndpoint(epDesc.Number)
+				break
+			}
+		}
+
+		if inEp == nil {
+			b.addLog("No IN endpoint found")
+			done()
+			dev.Close()
+			continue
+		}
+
+		currentBarcode := ""
+		buf := make([]byte, inEp.Desc.MaxPacketSize)
+
+		for {
+			n, err := inEp.Read(buf)
+			if err != nil {
+				break
+			}
+			if n < 3 || buf[2] == 0 {
+				continue
+			}
+
+			modifier := buf[0]
+			keycode := buf[2]
+			isShift := (modifier == 2 || modifier == 32)
+
+			if keycode == 40 {
+				if currentBarcode != "" {
+					go b.sendToPos(currentBarcode)
+					currentBarcode = ""
+				}
+			} else if val, ok := hidMap[keycode]; ok {
+				if isShift && len(val) == 1 && val[0] >= 'a' && val[0] <= 'z' {
+					val = string(val[0] - 32)
+				}
+				currentBarcode += val
+			}
+		}
+
+		done()
+		dev.Close()
+		b.addLog("Hardware connection lost. Reconnecting...")
+	}
+}

extensions/platformio/HX711_read/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

extensions/platformio/HX711_read/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

extensions/platformio/HX711_read/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

extensions/platformio/HX711_read/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

extensions/platformio/HX711_read/platformio.ini

@@ -0,0 +1,18 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:waveshare_rp2040_zero]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = waveshare_rp2040_zero
+framework = arduino
+monitor_speed = 115200
+lib_deps = 
+    https://github.com/Chris--A/Keypad
+    bogde/HX711@^0.7.5

extensions/platformio/HX711_read/src/main.cpp

@@ -0,0 +1,84 @@
+#include <Arduino.h>
+#include "HX711.h"
+
+const int LOADCELL_DOUT_PIN = 2;
+const int LOADCELL_SCK_PIN = 3;
+
+HX711 scale;
+
+float smoothedWeight = 0.0;
+float alpha = 0.3; 
+float calibration_factor = 111.17; 
+float known_weight = 796.0; 
+
+// Stability Lock Variables
+float lastDisplayedWeight = 0.0;
+const float STABILITY_THRESHOLD = 0.5;
+
+void calibrateScale() {
+    Serial.println("--- Calibration Mode ---");
+    Serial.println("1. Clear scale, type 't' to tare.");
+    Serial.print("2. Place "); Serial.print(known_weight); Serial.println("g weight.");
+    Serial.println("3. Type 'c' to confirm weight.");
+    
+    while (true) {
+        if (Serial.available()) {
+            char c = Serial.read();
+            if (c == 't') {
+                scale.tare();
+                Serial.println("Tared! Place weight and type 'c'...");
+            } else if (c == 'c') {
+                long reading = scale.get_value(15); 
+                calibration_factor = (float)reading / known_weight;
+                scale.set_scale(calibration_factor);
+                Serial.print("New Factor: "); Serial.println(calibration_factor);
+                Serial.println("Calibration Done! Exiting mode.");
+                break;
+            }
+        }
+    }
+}
+
+void setup() {
+    Serial.begin(115200);
+    scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
+    scale.set_gain(128); 
+    scale.set_scale(calibration_factor);
+    scale.tare();
+    Serial.println("HX711 Ready (Stable Lock Mode)");
+}
+
+void loop() {
+    if (scale.is_ready()) {
+        float currentReading = scale.get_units(1);
+        smoothedWeight = (alpha * currentReading) + (1.0 - alpha) * smoothedWeight;
+
+        // 1. Calculate the intended new display value
+        float targetWeight = round(smoothedWeight * 2.0) / 2.0;
+        if (abs(targetWeight) < 1.0) targetWeight = 0.0;
+
+        // 2. Stability Check
+        // Only update lastDisplayedWeight if the change exceeds the threshold
+        if (abs(targetWeight - lastDisplayedWeight) >= STABILITY_THRESHOLD) {
+            lastDisplayedWeight = targetWeight;
+        }
+
+        Serial.print("Weight: ");
+        Serial.print(lastDisplayedWeight, 1);
+        Serial.println(" g");
+    }
+
+    if (Serial.available()) {
+        char cmd = Serial.read();
+        if (cmd == 't') {
+            scale.tare();
+            smoothedWeight = 0; 
+            lastDisplayedWeight = 0; // Force display to zero immediately
+            Serial.println(">> Tared");
+        } else if (cmd == 'k') {
+            calibrateScale();
+        }
+    }
+
+    delay(10); 
+}

extensions/platformio/HX711_read/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

extensions/platformio/UART_SCALE_ALL/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

extensions/platformio/UART_SCALE_ALL/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

extensions/platformio/UART_SCALE_ALL/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

extensions/platformio/UART_SCALE_ALL/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

extensions/platformio/UART_SCALE_ALL/platformio.ini

@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:waveshare_rp2040_zero]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = waveshare_rp2040_zero
+framework = arduino
+monitor_speed = 115200
+lib_deps = https://github.com/Chris--A/Keypad

extensions/platformio/UART_SCALE_ALL/src/TM1621_Config.h

@@ -0,0 +1,50 @@
+#ifndef TM1621_CONFIG_H
+#define TM1621_CONFIG_H
+
+#include <Arduino.h>
+
+const uint8_t digitMap[] = {
+  0b11111100, // 0
+  0b00000110, // 1 
+  0b01011011, // 2
+  0b01001111, // 3
+  0b01100110, // 4
+  0b01101101, // 5
+  0b01111101, // 6
+  0b00000111, // 7
+  0b01111111, // 8
+  0b01101111  // 9
+};
+
+const int arrows[] = {283,363,183,203};    //tare,?,?,Zero
+const int battery[] = {63,83,103};         //LOW / MED / FULL
+
+// Following your pattern: {A, B, C, D, E, F, G}
+const int row1_d1[] = {300, 301, 302, 313, 312, 310, 311}; // Addresses 30 & 31
+const int row1_d2[] = {280, 281, 282, 293, 292, 290, 291}; // Addresses 28 & 29
+const int row1_d3[] = {260, 261, 262, 273, 272, 270, 271}; // Addresses 26 & 27
+const int row1_d4[] = {240, 241, 242, 253, 252, 250, 251}; // Addresses 24 & 25
+const int row1_d5[] = {220, 221, 222, 233, 232, 230, 231}; // Addresses 22 & 23
+const int row1_decimal[] = {263,232,223}; //XX.X.X.X
+
+const int row2_d1[] = {200, 201, 202, 213, 212, 210, 211}; // Addresses 20 & 21
+const int row2_d2[] = {180, 181, 182, 193, 192, 190, 191}; // Addresses 18 & 19
+const int row2_d3[] = {160, 161, 162, 173, 172, 170, 171}; // Addresses 16 & 17
+const int row2_d4[] = {140, 141, 142, 153, 152, 150, 151}; // Addresses 14 & 15
+const int row2_d5[] = {120, 121, 122, 133, 132, 130, 131}; // Addresses 12 & 13
+const int row2_decimal[] = {163,143,123}; //XX.X.X.X
+
+const int row3_d1[] = {100, 101, 102, 113, 112, 110, 111}; // Addresses 10 & 11
+const int row3_d2[] = {80, 81, 82, 93, 92, 90, 91};        // Addresses 8 & 9
+const int row3_d3[] = {60, 61, 62, 73, 72, 70, 71};        // Addresses 6 & 7
+const int row3_d4[] = {40, 41, 42, 53, 52, 50, 51};        // Addresses 4 & 5
+const int row3_d5[] = {20, 21, 22, 33, 32, 30, 31};        // Addresses 2 & 3
+const int row3_d6[] = {0, 1, 2, 13, 12, 10, 11};           // Addresses 0 & 1
+const int row3_decimal[] = {43,23,3};     //XX.X.X.X
+
+const int* digitsRow1[] = {row1_d1, row1_d2, row1_d3, row1_d4, row1_d5};
+const int* digitsRow2[] = {row2_d1, row2_d2, row2_d3, row2_d4, row2_d5};
+const int* digitsRow3[] = {row3_d1, row3_d2, row3_d3, row3_d4, row3_d5, row3_d6};
+
+const int* decimals[] = {row1_decimal, row2_decimal, row3_decimal};
+#endif

extensions/platformio/UART_SCALE_ALL/src/main.cpp

@@ -0,0 +1,270 @@
+#include <Arduino.h>
+#include "TM1621_Config.h"
+#include <Keypad.h>
+
+#define SCLK_SDI0819 1
+#define DOUT_SDI0819 2
+#define LCD_DATA 3
+#define LCD_WR 4
+#define LCD_CS 5
+#define BUZZER_PIN 6
+#define BACKLIGHT_PIN 7
+
+int currentAddr = 0;
+int currentBit = 0;
+
+void writeBits(uint32_t data, uint8_t count) {
+  for (int8_t i = count - 1; i >= 0; i--) {
+    digitalWrite(LCD_WR, LOW);
+    digitalWrite(LCD_DATA, (data >> i) & 0x01);
+    digitalWrite(LCD_WR, HIGH);
+  }
+}
+
+void sendCmd(uint8_t cmd) {
+  digitalWrite(LCD_CS, LOW);
+  writeBits(0x04, 3); // Binary 100 [cite: 432]
+  writeBits(cmd, 8);  // Command [cite: 413, 534]
+  writeBits(0, 1);    // X bit [cite: 416]
+  digitalWrite(LCD_CS, HIGH);
+}
+
+void writeAddr(uint8_t addr, uint8_t data) {
+  digitalWrite(LCD_CS, LOW);
+  uint16_t header = (0x05 << 6) | (addr & 0x3F); // Mode 101 [cite: 475]
+  writeBits(header, 9);
+  writeBits(data & 0x0F, 4); // 4 bits of data [cite: 475]
+  digitalWrite(LCD_CS, HIGH);
+}
+
+void updateDisplay() {
+  // Clear all segments first
+  for (int i = 0; i < 32; i++) {
+    writeAddr(i, 0x00);
+  }
+  // Light up only the current bit
+  writeAddr(currentAddr, (1 << currentBit));
+
+  Serial.print(">>> CURRENT - Address: ");
+  Serial.print(currentAddr);
+  Serial.print(" | Bit (COM): ");
+  Serial.println(currentBit);
+  Serial.println("Enter 'n' for Next, 'p' for Prev:");
+}
+
+uint8_t shadowRAM[32] = {0}; 
+
+void writeMappedSegment(int aab, bool state) {
+  int addr = aab / 10;
+  int bit = aab % 10;
+  
+  if (state) shadowRAM[addr] |= (1 << bit);
+  else shadowRAM[addr] &= ~(1 << bit);
+
+  writeAddr(addr, shadowRAM[addr]);
+}
+
+void displayDigit(const int segments[], int number) {
+  uint8_t bits = digitMap[number % 10];
+  for (int i = 0; i < 7; i++) {
+    // We check Bit 0, then Bit 1, etc.
+    // This maps i=0 to Segment A, i=1 to Segment B...
+    bool state = (bits >> i) & 0x01; 
+    writeMappedSegment(segments[i], state);
+  }
+}
+
+void printToRow(int row, long value, int decimalPos = 0) {
+  const int** currentRow;
+  int numDigits;
+  
+  // Select row configuration
+  switch(row) {
+    case 1: currentRow = digitsRow1; numDigits = 5; break;
+    case 2: currentRow = digitsRow2; numDigits = 5; break;
+    case 3: currentRow = digitsRow3; numDigits = 6; break;
+    default: return;
+  }
+
+  // Display the number right-aligned
+  long tempValue = value;
+  for (int i = numDigits - 1; i >= 0; i--) {
+    if (tempValue > 0 || i == numDigits - 1) { // Show at least one digit
+      displayDigit(currentRow[i], tempValue % 10);
+      tempValue /= 10;
+    } else {
+      // Clear leading zeros (all segments off)
+      for (int s = 0; s < 7; s++) writeMappedSegment(currentRow[i][s], false);
+    }
+  }
+
+  // Handle Decimal Points (if applicable for that row)
+  if (decimalPos > 0 && decimalPos <= 3) {
+    writeMappedSegment(decimals[row-1][decimalPos-1], true);
+  }
+}
+
+void setupDisplay() {
+  pinMode(LCD_DATA, OUTPUT);
+  pinMode(LCD_WR, OUTPUT);
+  pinMode(LCD_CS, OUTPUT);
+  digitalWrite(LCD_CS, HIGH); // Initialize serial interface [cite: 443]
+
+  sendCmd(0x01); // SYS EN [cite: 534]
+  sendCmd(0x29); // BIAS 1/3, 4 COM [cite: 420, 544]
+  sendCmd(0x03); // LCD ON [cite: 534]
+
+  updateDisplay();
+}
+
+const byte ROWS = 4;
+const byte COLS = 5;
+
+char keys[ROWS][COLS] = {{'1', '2', '3', 'C', 'T'},
+                         {'4', '5', '6', 'A', 'Z'},
+                         {'7', '8', '9', 'X', 'Y'},
+                         {'0', '.', 'S', 'M', 'L'}};
+
+byte rowPins[ROWS] = {8,9, 10, 11};
+byte colPins[COLS] = {12,13,14,15,16};
+
+Keypad kpd = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
+
+void playBeep() {
+  analogWrite(BUZZER_PIN, 10);
+  delay(50);
+  analogWrite(BUZZER_PIN, 0);
+}
+
+long tareOffset = 0;
+float calibrationFactor =
+    74.17; // 1.0 by default, callibrated by placing 796 weight and callibrating
+
+long readSD10809() {
+  long data = 0;
+
+  // Wait for DRDY to go LOW
+  uint32_t timeout = millis();
+  while (digitalRead(DOUT_SDI0819) == HIGH) {
+    if (millis() - timeout > 100)
+      return -1; // 20Hz rate is 50ms
+  }
+
+  // Read 24-bit ADC result [cite: 158, 160]
+  for (int i = 0; i < 24; i++) {
+    digitalWrite(SCLK_SDI0819, HIGH);
+    delayMicroseconds(1);
+    data = (data << 1) | digitalRead(DOUT_SDI0819);
+    digitalWrite(SCLK_SDI0819, LOW);
+    delayMicroseconds(1);
+  }
+
+  // Send 3 extra pulses (Total 27) to keep Channel A at 128x Gain [cite: 152,
+  // 161]
+  for (int i = 0; i < 3; i++) {
+    digitalWrite(SCLK_SDI0819, HIGH);
+    delayMicroseconds(1);
+    digitalWrite(SCLK_SDI0819, LOW);
+    delayMicroseconds(1);
+  }
+
+  // Handle 24-bit Two's Complement sign extension [cite: 108]
+  if (data & 0x800000)
+    data |= 0xFF000000;
+
+  return data;
+}
+
+long getAverageReading(int samples) {
+  long sum = 0;
+  int count = 0;
+  while (count < samples) {
+    long val = readSD10809();
+    if (val != -1) {
+      sum += val;
+      count++;
+    }
+  }
+  return sum / samples;
+}
+
+void tare() {
+  Serial.println("Taring... keep scale still.");
+  tareOffset = getAverageReading(20);
+  Serial.print("New Offset: ");
+  Serial.println(tareOffset);
+}
+
+void calibrate(float knownWeightGrams) {
+  long currentRaw = getAverageReading(20);
+  calibrationFactor = (float)(currentRaw - tareOffset) / knownWeightGrams;
+  Serial.print("Calibration Factor set to: ");
+  Serial.println(calibrationFactor);
+}
+
+void setupADC() {
+  pinMode(SCLK_SDI0819, OUTPUT);
+  pinMode(DOUT_SDI0819, INPUT);
+
+  // Give the chip time to stabilize (2 cycles for SD10809) [cite: 142]
+  delay(500);
+  tare();
+}
+
+void setup() {
+  Serial.begin(115200);
+  setupDisplay();
+  setupADC();
+}
+
+void loop() {
+  long raw = readSD10809();
+
+  if (kpd.getKeys()) {
+    for (int i = 0; i < LIST_MAX; i++) {
+      if (kpd.key[i].stateChanged) {
+        String msg = "";
+        switch (kpd.key[i].kstate) {
+        case PRESSED:
+          msg = " PRESSED.";
+          playBeep();
+          break;
+        case HOLD:
+          msg = " HOLD.";
+          break;
+        case RELEASED:
+          msg = " RELEASED.";
+          break;
+        case IDLE:
+          msg = " IDLE.";
+          break;
+        }
+
+        if (msg != "") {
+          Serial.print("Key ");
+          Serial.print(kpd.key[i].kchar);
+          Serial.println(msg);
+        }
+      }
+    }
+  }
+
+  if (raw != -1) {
+    float displayWeight = (raw - tareOffset) / calibrationFactor;
+
+    Serial.print("Weight: ");
+    Serial.print(displayWeight, 2);
+    Serial.println(" g");
+  }
+
+  // Example trigger for calibration via Serial
+  if (Serial.available()) {
+    char c = Serial.read();
+    if (c == 't') {
+      tare();
+    }
+    if (c == 'c') {
+      calibrate(796);
+    }
+  }
+}

extensions/platformio/UART_SCALE_ALL/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

extensions/platformio/display_driver/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

extensions/platformio/display_driver/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

extensions/platformio/display_driver/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

extensions/platformio/display_driver/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

extensions/platformio/display_driver/platformio.ini

@@ -0,0 +1,15 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:waveshare_rp2040_zero]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = waveshare_rp2040_zero
+framework = arduino
+monitor_speed = 115200

extensions/platformio/display_driver/src/TM1621_Config.h

@@ -0,0 +1,50 @@
+#ifndef TM1621_CONFIG_H
+#define TM1621_CONFIG_H
+
+#include <Arduino.h>
+
+const uint8_t digitMap[] = {
+  0b11111100, // 0
+  0b00000110, // 1 
+  0b01011011, // 2
+  0b01001111, // 3
+  0b01100110, // 4
+  0b01101101, // 5
+  0b01111101, // 6
+  0b00000111, // 7
+  0b01111111, // 8
+  0b01101111  // 9
+};
+
+const int arrows[] = {283,363,183,203};    //tare,?,?,Zero
+const int battery[] = {63,83,103};         //LOW / MED / FULL
+
+// Following your pattern: {A, B, C, D, E, F, G}
+const int row1_d1[] = {300, 301, 302, 313, 312, 310, 311}; // Addresses 30 & 31
+const int row1_d2[] = {280, 281, 282, 293, 292, 290, 291}; // Addresses 28 & 29
+const int row1_d3[] = {260, 261, 262, 273, 272, 270, 271}; // Addresses 26 & 27
+const int row1_d4[] = {240, 241, 242, 253, 252, 250, 251}; // Addresses 24 & 25
+const int row1_d5[] = {220, 221, 222, 233, 232, 230, 231}; // Addresses 22 & 23
+const int row1_decimal[] = {263,232,223}; //XX.X.X.X
+
+const int row2_d1[] = {200, 201, 202, 213, 212, 210, 211}; // Addresses 20 & 21
+const int row2_d2[] = {180, 181, 182, 193, 192, 190, 191}; // Addresses 18 & 19
+const int row2_d3[] = {160, 161, 162, 173, 172, 170, 171}; // Addresses 16 & 17
+const int row2_d4[] = {140, 141, 142, 153, 152, 150, 151}; // Addresses 14 & 15
+const int row2_d5[] = {120, 121, 122, 133, 132, 130, 131}; // Addresses 12 & 13
+const int row2_decimal[] = {163,143,123}; //XX.X.X.X
+
+const int row3_d1[] = {100, 101, 102, 113, 112, 110, 111}; // Addresses 10 & 11
+const int row3_d2[] = {80, 81, 82, 93, 92, 90, 91};        // Addresses 8 & 9
+const int row3_d3[] = {60, 61, 62, 73, 72, 70, 71};        // Addresses 6 & 7
+const int row3_d4[] = {40, 41, 42, 53, 52, 50, 51};        // Addresses 4 & 5
+const int row3_d5[] = {20, 21, 22, 33, 32, 30, 31};        // Addresses 2 & 3
+const int row3_d6[] = {0, 1, 2, 13, 12, 10, 11};           // Addresses 0 & 1
+const int row3_decimal[] = {43,23,3};     //XX.X.X.X
+
+const int* digitsRow1[] = {row1_d1, row1_d2, row1_d3, row1_d4, row1_d5};
+const int* digitsRow2[] = {row2_d1, row2_d2, row2_d3, row2_d4, row2_d5};
+const int* digitsRow3[] = {row3_d1, row3_d2, row3_d3, row3_d4, row3_d5, row3_d6};
+
+const int* decimals[] = {row1_decimal, row2_decimal, row3_decimal};
+#endif

extensions/platformio/display_driver/src/main.cpp

@@ -0,0 +1,175 @@
+#include <Arduino.h>
+#include "TM1621_Config.h"
+
+#define LCD_DATA 29
+#define LCD_WR   28
+#define LCD_CS   27
+
+// Tracking variables
+int currentAddr = 0;
+int currentBit = 0;
+
+void writeBits(uint32_t data, uint8_t count) {
+  for (int8_t i = count - 1; i >= 0; i--) {
+    digitalWrite(LCD_WR, LOW);
+    digitalWrite(LCD_DATA, (data >> i) & 0x01);
+    digitalWrite(LCD_WR, HIGH);
+  }
+}
+
+void sendCmd(uint8_t cmd) {
+  digitalWrite(LCD_CS, LOW);
+  writeBits(0x04, 3);   // Binary 100 [cite: 432]
+  writeBits(cmd, 8);    // Command [cite: 413, 534]
+  writeBits(0, 1);      // X bit [cite: 416]
+  digitalWrite(LCD_CS, HIGH);
+}
+
+void writeAddr(uint8_t addr, uint8_t data) {
+  digitalWrite(LCD_CS, LOW);
+  uint16_t header = (0x05 << 6) | (addr & 0x3F); // Mode 101 [cite: 475]
+  writeBits(header, 9);
+  writeBits(data & 0x0F, 4); // 4 bits of data [cite: 475]
+  digitalWrite(LCD_CS, HIGH);
+}
+
+void updateDisplay() {
+  // Clear all segments first
+  for (int i = 0; i < 32; i++) {
+    writeAddr(i, 0x00);
+  }
+  // Light up only the current bit
+  writeAddr(currentAddr, (1 << currentBit));
+  
+  Serial.print(">>> CURRENT - Address: ");
+  Serial.print(currentAddr);
+  Serial.print(" | Bit (COM): ");
+  Serial.println(currentBit);
+  Serial.println("Enter 'n' for Next, 'p' for Prev:");
+}
+
+void setup() {
+  pinMode(LCD_DATA, OUTPUT);
+  pinMode(LCD_WR, OUTPUT);
+  pinMode(LCD_CS, OUTPUT);
+  digitalWrite(LCD_CS, HIGH); // Initialize serial interface [cite: 443]
+  
+  sendCmd(0x01); // SYS EN [cite: 534]
+  sendCmd(0x29); // BIAS 1/3, 4 COM [cite: 420, 544]
+  sendCmd(0x03); // LCD ON [cite: 534]
+
+  updateDisplay();
+}
+
+uint8_t shadowRAM[32] = {0}; 
+
+void writeMappedSegment(int aab, bool state) {
+  int addr = aab / 10;
+  int bit = aab % 10;
+  
+  if (state) shadowRAM[addr] |= (1 << bit);
+  else shadowRAM[addr] &= ~(1 << bit);
+
+  writeAddr(addr, shadowRAM[addr]);
+}
+
+void displayDigit(const int segments[], int number) {
+  uint8_t bits = digitMap[number % 10];
+  for (int i = 0; i < 7; i++) {
+    // We check Bit 0, then Bit 1, etc.
+    // This maps i=0 to Segment A, i=1 to Segment B...
+    bool state = (bits >> i) & 0x01; 
+    writeMappedSegment(segments[i], state);
+  }
+}
+
+void printToRow(int row, long value, int decimalPos = 0) {
+  const int** currentRow;
+  int numDigits;
+  
+  // Select row configuration
+  switch(row) {
+    case 1: currentRow = digitsRow1; numDigits = 5; break;
+    case 2: currentRow = digitsRow2; numDigits = 5; break;
+    case 3: currentRow = digitsRow3; numDigits = 6; break;
+    default: return;
+  }
+
+  // Display the number right-aligned
+  long tempValue = value;
+  for (int i = numDigits - 1; i >= 0; i--) {
+    if (tempValue > 0 || i == numDigits - 1) { // Show at least one digit
+      displayDigit(currentRow[i], tempValue % 10);
+      tempValue /= 10;
+    } else {
+      // Clear leading zeros (all segments off)
+      for (int s = 0; s < 7; s++) writeMappedSegment(currentRow[i][s], false);
+    }
+  }
+
+  // Handle Decimal Points (if applicable for that row)
+  if (decimalPos > 0 && decimalPos <= 3) {
+    writeMappedSegment(decimals[row-1][decimalPos-1], true);
+  }
+}
+
+int counter1 = 0;
+int counter2 = 0;
+int counter3 = 0;
+
+void loop() {
+  printToRow(1, counter1);
+  printToRow(2, counter2);
+  printToRow(3, counter3);
+
+  counter1 = (counter1 + 1) % 1000;
+  counter2 = (counter2 + 2) % 1000;
+  counter3 = (counter3 + 3) % 1000;
+  delay(100);
+}
+
+// void loop() {
+//   writeAddr(0, 0x00);
+//   writeAddr(1, 0x00);
+//   writeAddr(2, 0x00);
+//   writeAddr(3, 0x00);
+
+//   displayDigit(row1_d1, counter);
+
+//   Serial.println(counter);
+
+//   counter++;
+//   if (counter > 9) {
+//     counter = 0;
+//   }
+
+//   delay(1000); 
+// }
+
+// void loop() {
+//   if (Serial.available() > 0) {
+//     char input = Serial.read();
+    
+//     // Ignore newline/carriage return characters
+//     if (input == '\n' || input == '\r') return;
+
+//     if (input == 'n' || input == 'N') {
+//       currentBit++;
+//       if (currentBit > 3) {
+//         currentBit = 0;
+//         currentAddr++;
+//       }
+//       if (currentAddr > 31) currentAddr = 0;
+//       updateDisplay();
+//     } 
+//     else if (input == 'p' || input == 'P') {
+//       currentBit--;
+//       if (currentBit < 0) {
+//         currentBit = 3;
+//         currentAddr--;
+//       }
+//       if (currentAddr < 0) currentAddr = 31;
+//       updateDisplay();
+//     }
+//   }
+// }

extensions/platformio/display_driver/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

extensions/platformio/keypad_read/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

extensions/platformio/keypad_read/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

extensions/platformio/keypad_read/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

extensions/platformio/keypad_read/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

extensions/platformio/keypad_read/platformio.ini

@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:waveshare_rp2040_zero]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = waveshare_rp2040_zero
+framework = arduino
+monitor_speed = 115200
+lib_deps = https://github.com/Chris--A/Keypad

extensions/platformio/keypad_read/src/main.cpp

@@ -0,0 +1,70 @@
+#include <Arduino.h>
+#include <Keypad.h>
+
+#define BUZZER_PIN 9
+
+const byte ROWS = 4;
+const byte COLS = 5;
+
+char keys[ROWS][COLS] = {{'1', '2','3','C','T'},
+                         {'4', '5','6','A','Z'},
+                         {'7', '8','9','X','Y'},
+                         {'0', '.','S','M','L'}};
+
+byte rowPins[ROWS] = {0,1,2,3};
+byte colPins[COLS] = {4,5,6,7,8};
+
+Keypad kpd = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
+
+unsigned long loopCount = 0;
+unsigned long startTime;
+
+void playBeep() {
+  analogWrite(BUZZER_PIN, 10);
+  delay(50);
+  analogWrite(BUZZER_PIN, 0);
+}
+
+void setup() {
+  Serial.begin(115200);
+  startTime = millis();
+}
+
+void loop() {
+  loopCount++;
+  if ((millis() - startTime) > 5000) {
+    Serial.print("Average loops per second = ");
+    Serial.println(loopCount / 5);
+    startTime = millis();
+    loopCount = 0;
+  }
+
+  if (kpd.getKeys()) {
+    for (int i = 0; i < LIST_MAX; i++) {
+      if (kpd.key[i].stateChanged) {
+        String msg = "";
+        switch (kpd.key[i].kstate) {
+        case PRESSED:
+          msg = " PRESSED.";
+          playBeep();
+          break;
+        case HOLD:
+          msg = " HOLD.";
+          break;
+        case RELEASED:
+          msg = " RELEASED.";
+          break;
+        case IDLE:
+          msg = " IDLE.";
+          break;
+        }
+
+        if (msg != "") {
+          Serial.print("Key ");
+          Serial.print(kpd.key[i].kchar);
+          Serial.println(msg);
+        }
+      }
+    }
+  }
+}

extensions/platformio/keypad_read/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

extensions/python/KeyGenerator/createPDF.py

@@ -0,0 +1,164 @@
+import os
+import json
+import requests
+import barcode
+import urllib3
+import re
+from barcode.writer import ImageWriter
+from PIL import Image, ImageDraw, ImageFont
+from io import BytesIO
+
+# --- SETTINGS ---
+urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
+
+JSON_FILE = os.path.join(os.getcwd(), 'curated_list.json')
+CARD_DIR = os.path.join(os.getcwd(), 'keychain_cards')
+IMG_CACHE_DIR = os.path.join(os.getcwd(), 'image_cache')
+OUTPUT_PDF = os.path.join(os.getcwd(), 'keychain_3x3_perfect.pdf')
+
+# A4 at 300 DPI
+PAGE_W, PAGE_H = 2480, 3508
+COLS, ROWS = 3, 3
+PAGE_MARGIN = 150
+
+# Ensure directories exist
+for d in [CARD_DIR, IMG_CACHE_DIR]:
+    os.makedirs(d, exist_ok=True)
+
+def clean_filename(name):
+    return re.sub(r'[\\/*?:"<>|]', "_", name)
+
+def get_ean_from_plu(plu):
+    return f"000000{str(plu).zfill(4)}00"
+
+def get_cached_image(url, plu):
+    cache_path = os.path.join(IMG_CACHE_DIR, f"{plu}.jpg")
+
+    # Si el archivo ya existe en el cache, lo usamos sin importar la URL
+    if os.path.exists(cache_path):
+        return cache_path
+
+    # Si no existe y la URL es un placeholder, no podemos descargar nada
+    if url == "URL_PLACEHOLDER":
+        print(f"⚠️ {plu} tiene placeholder y no se encontró en {IMG_CACHE_DIR}")
+        return None
+
+    # Lógica de descarga original para URLs reales
+    try:
+        headers = {'User-Agent': 'Mozilla/5.0'}
+        res = requests.get(url, headers=headers, timeout=10, verify=False)
+        if res.status_code == 200:
+            with open(cache_path, 'wb') as f:
+                f.write(res.content)
+            return cache_path
+    except Exception as e:
+        print(f"❌ Error descargando {plu}: {e}")
+    return None
+
+def generate_card(item):
+    name = item['name']
+    plu = item['plu']
+    img_url = item['image']
+
+    safe_name = clean_filename(name).replace(' ', '_')
+    final_path = os.path.join(CARD_DIR, f"PLU_{plu}_{safe_name}.png")
+
+    if os.path.exists(final_path):
+        return final_path
+
+    local_img_path = get_cached_image(img_url, plu)
+    card = Image.new('RGB', (300, 450), color='white')
+    draw = ImageDraw.Draw(card)
+    draw.rectangle([0, 0, 299, 449], outline="black", width=3)
+
+    if local_img_path:
+        try:
+            img = Image.open(local_img_path).convert("RGB")
+            w, h = img.size
+            size = min(w, h)
+            img = img.crop(((w-size)//2, (h-size)//2, (w+size)//2, (h+size)//2))
+            img = img.resize((200, 200), Image.Resampling.LANCZOS)
+            card.paste(img, (50, 40))
+        except:
+            draw.text((150, 140), "[IMG ERROR]", anchor="mm", fill="red")
+    else:
+        draw.text((150, 140), "[NOT FOUND]", anchor="mm", fill="red")
+
+    try:
+        f_name = ImageFont.truetype("arialbd.ttf", 22)
+        f_plu = ImageFont.truetype("arial.ttf", 18)
+    except:
+        f_name = f_plu = ImageFont.load_default()
+
+    draw.text((150, 260), name.upper(), fill="black", font=f_name, anchor="mm")
+    draw.text((150, 295), f"PLU: {plu}", fill="#333333", font=f_plu, anchor="mm")
+
+    EAN = barcode.get_barcode_class('ean13')
+    ean = EAN(get_ean_from_plu(plu), writer=ImageWriter())
+    tmp = f"tmp_{plu}"
+    ean.save(tmp, options={'module_height': 12.0, 'font_size': 10, 'text_distance': 4})
+
+    if os.path.exists(f"{tmp}.png"):
+        b_img = Image.open(f"{tmp}.png")
+        b_img = b_img.resize((280, 120))
+        card.paste(b_img, (10, 320))
+        os.remove(f"{tmp}.png")
+
+    card.save(final_path)
+    print(f"    - Card created: {name} ({plu})")
+    return final_path
+
+def create_pdf():
+    all_files = sorted([f for f in os.listdir(CARD_DIR) if f.endswith('.png')])
+    if not all_files:
+        print("❌ No cards found to put in PDF.")
+        return
+
+    available_w = PAGE_W - (PAGE_MARGIN * 2)
+    available_h = PAGE_H - (PAGE_MARGIN * 2)
+    slot_w, slot_h = available_w // COLS, available_h // ROWS
+
+    target_w = int(slot_w * 0.9)
+    target_h = int(target_w * (450 / 300))
+
+    if target_h > (slot_h * 0.9):
+        target_h = int(slot_h * 0.9)
+        target_w = int(target_h * (300 / 450))
+
+    pages = []
+    current_page = Image.new('RGB', (PAGE_W, PAGE_H), 'white')
+
+    print(f"📄 Organizing {len(all_files)} cards into {COLS}x{ROWS} grid...")
+
+    for i, filename in enumerate(all_files):
+        item_idx = i % (COLS * ROWS)
+        if item_idx == 0 and i > 0:
+            pages.append(current_page)
+            current_page = Image.new('RGB', (PAGE_W, PAGE_H), 'white')
+
+        row, col = item_idx // COLS, item_idx % COLS
+        img_path = os.path.join(CARD_DIR, filename)
+        card_img = Image.open(img_path).convert('RGB')
+        card_img = card_img.resize((target_w, target_h), Image.Resampling.LANCZOS)
+
+        x = PAGE_MARGIN + (col * slot_w) + (slot_w - target_w) // 2
+        y = PAGE_MARGIN + (row * slot_h) + (slot_h - target_h) // 2
+        current_page.paste(card_img, (x, y))
+
+    pages.append(current_page)
+    pages[0].save(OUTPUT_PDF, save_all=True, append_images=pages[1:], resolution=300.0, quality=100)
+    print(f"✅ Created {OUTPUT_PDF}. Now go print it and stop crying.")
+
+if __name__ == "__main__":
+    if not os.path.exists(JSON_FILE):
+        print(f"❌ Missing {JSON_FILE}")
+    else:
+        with open(JSON_FILE, 'r', encoding='utf-8') as f:
+            data = json.load(f)
+
+        print(f"Step 1: Processing {len(data)} cards...")
+        for entry in data:
+            generate_card(entry)
+
+        print("\nStep 2: Generating PDF...")
+        create_pdf()

extensions/python/KeyGenerator/excel_parser.py

@@ -0,0 +1,51 @@
+import pandas as pd
+import json
+import os
+
+file_path = os.path.join(os.getcwd(), 'PLU+FSMA+list+v1.0.xlsx')
+sheet_name = 'Non FTL' 
+new_url_base = "https://server-ifps.accurateig.com/assets/commodities/"
+
+def get_one_of_each():
+    if not os.path.exists(file_path):
+        print("❌ Excel file not found.")
+        return
+
+    # 1. Load Excel
+    df = pd.read_excel(file_path, sheet_name=sheet_name)
+
+    # 2. Drop rows missing the essentials
+    df = df.dropna(subset=['IMAGE', 'PLU', 'COMMODITY'])
+
+    # 3. CRITICAL: Drop duplicates by COMMODITY only
+    # This ignores Variety and Size, giving us exactly one row per fruit type.
+    df_unique = df.drop_duplicates(subset=['COMMODITY'], keep='first')
+
+    data_output = []
+
+    for _, row in df_unique.iterrows():
+        # Extract filename from the messy URL in Excel
+        original_link = str(row['IMAGE'])
+        filename = original_link.split('/')[-1]
+        
+        # Build the final working URL
+        image_url = f"{new_url_base}{filename}"
+        
+        # Get the clean Commodity name
+        commodity = str(row['COMMODITY']).title()
+        plu_code = str(row['PLU'])
+
+        data_output.append({
+            "name": commodity,
+            "plu": plu_code,
+            "image": image_url
+        })
+
+    # 4. Save to JSON
+    with open('one_of_each.json', 'w', encoding='utf-8') as f:
+        json.dump(data_output, f, indent=4, ensure_ascii=False)
+
+    print(f"✅ Success! Generated 'one_of_each.json' with {len(data_output)} unique commodities.")
+
+if __name__ == "__main__":
+    get_one_of_each()

extensions/python/ScannerCOM/scanner.py

@@ -0,0 +1,41 @@
+import serial
+import requests
+import time
+
+# --- CONFIGURATION ---
+COM_PORT = 'COM5'  # Change to /dev/ttyUSB0 on Linux
+BAUD_RATE = 115200
+# The IP of the PC running your Flask WebUI
+SERVER_URL = "https://scanner.sekidesu.xyz/scan"  # Change to your server's URL
+
+def run_bridge():
+    try:
+        # Initialize serial connection
+        ser = serial.Serial(COM_PORT, BAUD_RATE, timeout=0.1)
+        print(f"Connected to {COM_PORT} at {BAUD_RATE} bauds.")
+        print("Ready to scan. Try not to break it.")
+
+        while True:
+            # Read line from scanner (most scanners send \r or \n at the end)
+            if ser.in_waiting > 0:
+                barcode = ser.readline().decode('utf-8').strip()
+                
+                if barcode:
+                    print(f"Scanned: {barcode}")
+                    try:
+                        # Send to your existing Flask server
+                        # We use the same parameter 'content' so your server doesn't know the difference
+                        resp = requests.get(SERVER_URL, params={'content': barcode})
+                        print(f"Server responded: {resp.status_code}")
+                    except Exception as e:
+                        print(f"Failed to send to server: {e}")
+            
+            time.sleep(0.01) # Don't melt your CPU
+
+    except serial.SerialException as e:
+        print(f"Error opening {COM_PORT}: {e}")
+    except KeyboardInterrupt:
+        print("\nBridge stopped by user. Quitter.")
+
+if __name__ == "__main__":
+    run_bridge()

extensions/python/ScannerCOM/scannerV2.py

@@ -0,0 +1,36 @@
+import serial
+import requests
+import time
+import argparse
+import sys
+
+def run_bridge():
+    parser = argparse.ArgumentParser(description="Scanner Bridge for the technically impaired")
+    parser.add_argument('--port', default='COM5', help='Serial port (default: COM5)')
+    parser.add_argument('--baud', type=int, default=115200, help='Baud rate (default: 115200)')
+    parser.add_argument('--url', default='https://scanner.sekidesu.xyz/scan', help='Server URL')
+    args = parser.parse_args()
+
+    try:
+        ser = serial.Serial(args.port, args.baud, timeout=0.1)
+        print(f"Connected to {args.port} at {args.baud} bauds.")
+        
+        while True:
+            if ser.in_waiting > 0:
+                barcode = ser.readline().decode('utf-8', errors='ignore').strip()
+                if barcode:
+                    print(f"Scanned: {barcode}")
+                    try:
+                        resp = requests.get(args.url, params={'content': barcode}, timeout=5)
+                        print(f"Server responded: {resp.status_code}")
+                    except Exception as e:
+                        print(f"Failed to send to server: {e}")
+            time.sleep(0.01)
+
+    except serial.SerialException as e:
+        print(f"Error opening {args.port}: {e}")
+    except KeyboardInterrupt:
+        print("\nBridge stopped. Finally.")
+
+if __name__ == "__main__":
+    run_bridge()

extensions/python/ScannerHID/gui_scanner.py

@@ -0,0 +1,155 @@
+import tkinter as tk
+from tkinter import ttk
+import threading
+import requests
+import usb.core
+import usb.util
+import usb.backend.libusb1
+import os
+import time
+
+VENDOR_ID = 0xFFFF
+PRODUCT_ID = 0x0035
+
+HID_MAP = {
+    4: 'a', 5: 'b', 6: 'c', 7: 'd', 8: 'e', 9: 'f', 10: 'g', 11: 'h', 12: 'i',
+    13: 'j', 14: 'k', 15: 'l', 16: 'm', 17: 'n', 18: 'o', 19: 'p', 20: 'q',
+    21: 'r', 22: 's', 23: 't', 24: 'u', 25: 'v', 26: 'w', 27: 'x', 28: 'y', 29: 'z',
+    30: '1', 31: '2', 32: '3', 33: '4', 34: '5', 35: '6', 36: '7', 37: '8', 38: '9', 39: '0',
+    44: ' ', 45: '-', 46: '=', 55: '.', 56: '/'
+}
+
+class POSBridgeApp:
+    def __init__(self, root):
+        self.root = root
+        self.root.title("POS Hardware Bridge")
+        self.root.geometry("500x320")
+        self.running = True
+        
+        # UI Setup
+        ttk.Label(root, text="Target POS Endpoint:").pack(pady=(15, 2))
+        self.url_var = tk.StringVar(value="https://scanner.sekidesu.xyz/scan")
+        self.url_entry = ttk.Entry(root, textvariable=self.url_var, width=60)
+        self.url_entry.pack(pady=5)
+        
+        self.status_var = tk.StringVar(value="Status: Booting...")
+        self.status_label = ttk.Label(root, textvariable=self.status_var, font=("Segoe UI", 10, "bold"))
+        self.status_label.pack(pady=10)
+        
+        ttk.Label(root, text="Activity Log:").pack()
+        self.log_listbox = tk.Listbox(root, width=70, height=8, bg="#1e1e1e", fg="#00ff00", font=("Consolas", 9))
+        self.log_listbox.pack(pady=5, padx=10)
+        
+        # Bind the close button to kill threads cleanly
+        self.root.protocol("WM_DELETE_WINDOW", self.on_close)
+
+        # Fire up the USB listener in a background thread
+        self.usb_thread = threading.Thread(target=self.usb_listen_loop, daemon=True)
+        self.usb_thread.start()
+
+    def log(self, message):
+        # Tkinter requires GUI updates to happen on the main thread
+        self.root.after(0, self._append_log, message)
+
+    def _append_log(self, message):
+        self.log_listbox.insert(0, time.strftime("[%H:%M:%S] ") + message)
+        if self.log_listbox.size() > 15:
+            self.log_listbox.delete(15)
+
+    def update_status(self, text, color="black"):
+        self.root.after(0, self._set_status, text, color)
+
+    def _set_status(self, text, color):
+        self.status_var.set(f"Status: {text}")
+        self.status_label.config(foreground=color)
+
+    def on_close(self):
+        self.running = False
+        self.root.destroy()
+
+    def send_to_pos(self, barcode):
+        url = self.url_var.get()
+        self.log(f"Captured: {barcode}. Sending...")
+        try:
+            resp = requests.get(url, params={'content': barcode}, timeout=3)
+            self.log(f"Success: POS returned {resp.status_code}")
+        except requests.RequestException as e:
+            self.log(f"HTTP Error: Backend unreachable")
+
+    def usb_listen_loop(self):
+        import sys
+        # PyInstaller extracts files to a temp _MEIPASS folder at runtime
+        if getattr(sys, 'frozen', False):
+            base_path = sys._MEIPASS
+        else:
+            base_path = os.path.dirname(os.path.abspath(__file__))
+            
+        dll_path = os.path.join(base_path, "libusb-1.0.dll")
+        
+        if not os.path.exists(dll_path):
+            self.update_status(f"CRITICAL: DLL missing at {dll_path}", "red")
+            return
+            
+        backend = usb.backend.libusb1.get_backend(find_library=lambda x: dll_path)
+        
+        while self.running:
+            # Reconnect loop
+            dev = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID, backend=backend)
+            
+            if dev is None:
+                self.update_status("Scanner unplugged. Waiting...", "red")
+                time.sleep(2)
+                continue
+                
+            try:
+                dev.set_configuration()
+                cfg = dev.get_active_configuration()
+                intf = cfg[(0,0)]
+                endpoint = usb.util.find_descriptor(
+                    intf,
+                    custom_match=lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN
+                )
+                
+                self.update_status("Scanner Locked & Ready", "green")
+                current_barcode = ""
+                
+                # Active reading loop
+                while self.running:
+                    try:
+                        data = dev.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize, timeout=1000)
+                        
+                        keycode = data[2]
+                        modifier = data[0]
+                        is_shift = modifier == 2 or modifier == 32
+                        
+                        if keycode == 0:
+                            continue 
+                            
+                        if keycode == 40: # Enter key signifies end of scan
+                            if current_barcode:
+                                # Spawn a micro-thread for the HTTP request so we don't block the next scan
+                                threading.Thread(target=self.send_to_pos, args=(current_barcode,), daemon=True).start()
+                                current_barcode = ""
+                        elif keycode in HID_MAP:
+                            char = HID_MAP[keycode]
+                            if is_shift and char.isalpha():
+                                char = char.upper()
+                            current_barcode += char
+                            
+                    except usb.core.USBError as e:
+                        # 10060/110 are normal timeouts when no barcode is being actively scanned
+                        if e.args[0] in (10060, 110): 
+                            continue
+                        else:
+                            self.log(f"Hardware interrupt lost. Reconnecting...")
+                            break # Breaks inner loop to trigger outer reconnect loop
+                            
+            except Exception as e:
+                self.log(f"USB Error: {e}")
+                time.sleep(2) # Prevent rapid crash loops
+
+if __name__ == '__main__':
+    # You must run pip install requests if you haven't already
+    root = tk.Tk()
+    app = POSBridgeApp(root)
+    root.mainloop()

extensions/python/checkHIDDevices.py

@@ -0,0 +1,25 @@
+import usb.core
+import usb.backend.libusb1
+import os
+
+# Grab the exact path to the DLL in your current folder
+current_dir = os.path.dirname(os.path.abspath(__file__))
+dll_path = os.path.join(current_dir, "libusb-1.0.dll")
+
+if not os.path.exists(dll_path):
+    print(f"I don't see the DLL at: {dll_path}")
+    exit(1)
+
+# Force pyusb to use this specific file
+backend = usb.backend.libusb1.get_backend(find_library=lambda x: dll_path)
+
+print("Scanning with forced local DLL backend...")
+devices = usb.core.find(find_all=True, backend=backend)
+
+found = False
+for d in devices:
+    found = True
+    print(f"Found Device -> VID: {hex(d.idVendor)} PID: {hex(d.idProduct)}")
+
+if not found:
+    print("Python is still blind. The DLL might be the wrong architecture (32-bit vs 64-bit).")

extensions/python/hidScanner.py

@@ -0,0 +1,85 @@
+import usb.core
+import usb.util
+import usb.backend.libusb1
+import os
+import sys
+
+# Your exact scanner IDs
+VENDOR_ID = 0xFFFF
+PRODUCT_ID = 0x0035
+
+# Basic HID to ASCII translation dictionary
+HID_MAP = {
+    4: 'a', 5: 'b', 6: 'c', 7: 'd', 8: 'e', 9: 'f', 10: 'g', 11: 'h', 12: 'i',
+    13: 'j', 14: 'k', 15: 'l', 16: 'm', 17: 'n', 18: 'o', 19: 'p', 20: 'q',
+    21: 'r', 22: 's', 23: 't', 24: 'u', 25: 'v', 26: 'w', 27: 'x', 28: 'y', 29: 'z',
+    30: '1', 31: '2', 32: '3', 33: '4', 34: '5', 35: '6', 36: '7', 37: '8', 38: '9', 39: '0',
+    44: ' ', 45: '-', 46: '=', 55: '.', 56: '/'
+}
+
+def main():
+    # Force the local DLL backend
+    current_dir = os.path.dirname(os.path.abspath(__file__))
+    dll_path = os.path.join(current_dir, "libusb-1.0.dll")
+    
+    if not os.path.exists(dll_path):
+        print(f"Error: Missing {dll_path}")
+        sys.exit(1)
+        
+    backend = usb.backend.libusb1.get_backend(find_library=lambda x: dll_path)
+
+    # Find the scanner using the forced backend
+    dev = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID, backend=backend)
+
+    if dev is None:
+        print("Scanner not found. Check Zadig driver again.")
+        sys.exit(1)
+
+    # Claim device
+    dev.set_configuration()
+    cfg = dev.get_active_configuration()
+    intf = cfg[(0,0)]
+
+    endpoint = usb.util.find_descriptor(
+        intf,
+        custom_match=lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN
+    )
+
+    print("Scanner locked. Waiting for barcodes...")
+    
+    current_barcode = ""
+
+    while True:
+        try:
+            # Read 8 bytes from the scanner
+            data = dev.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize, timeout=1000)
+            
+            keycode = data[2]
+            modifier = data[0]
+            is_shift = modifier == 2 or modifier == 32
+
+            if keycode == 0:
+                continue 
+                
+            if keycode == 40: # Enter key
+                print(f"Captured Barcode: {current_barcode}")
+                current_barcode = "" 
+            elif keycode in HID_MAP:
+                char = HID_MAP[keycode]
+                if is_shift and char.isalpha():
+                    char = char.upper()
+                current_barcode += char
+
+        except usb.core.USBError as e:
+            if e.args[0] == 10060 or e.args[0] == 110: 
+                continue
+            else:
+                print(f"USB Error: {e}")
+                break
+        except KeyboardInterrupt:
+            print("\nExiting and releasing scanner...")
+            usb.util.dispose_resources(dev)
+            break
+
+if __name__ == '__main__':
+    main()

extensions/python/migrateLegacyDB.py

@@ -0,0 +1,29 @@
+import sqlite3
+
+DB_FILE = 'db/pos_database.db'
+
+def upgrade_db():
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+<<<<<<< HEAD
+=======
+            # Add stock column
+            # conn.execute("ALTER TABLE products ADD COLUMN stock REAL DEFAULT 0")
+            # print("Successfully added 'stock' column.")
+            
+            # # App.py also expects unit_type, adding it to prevent future headaches
+            # conn.execute("ALTER TABLE products ADD COLUMN unit_type TEXT DEFAULT 'unit'")
+            # print("Successfully added 'unit_type' column.")
+>>>>>>> 1a048a0e074ee26bd45dda9731c78c2ecef42fba
+
+            conn.execute("ALTER TABLE dicom ADD COLUMN image_url TEXT;")
+            print("Successfully added 'image_url' column.")
+
+            conn.commit()
+            print("Migration complete. Your data is intact.")
+            
+    except sqlite3.OperationalError as e:
+        print(f"Skipped: {e}. (This usually means the columns already exist, so you're fine).")
+
+if __name__ == '__main__':
+    upgrade_db()

requirements.txt

@@ -2,4 +2,5 @@ Flask==3.1.3
 Flask-Login==0.6.3
 Flask-SocketIO==5.6.1
 requests==2.32.5
-eventlet==0.36.1
+eventlet==0.36.1
+python-dotenv==1.2.2

static/cookieStuff.js

@@ -0,0 +1,17 @@
+function setCookie(name, value, days = 365) {
+    const d = new Date();
+    d.setTime(d.getTime() + (days * 24 * 60 * 60 * 1000));
+    let expires = "expires=" + d.toUTCString();
+    document.cookie = name + "=" + value + ";" + expires + ";path=/;SameSite=Lax";
+}
+
+function getCookie(name) {
+    let nameEQ = name + "=";
+    let ca = document.cookie.split(';');
+    for (let i = 0; i < ca.length; i++) {
+        let c = ca[i];
+        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
+        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
+    }
+    return null;
+}

static/style.css

@@ -0,0 +1,274 @@
+    :root {
+        --bg: #ebedef;
+        --card-bg: #ffffff;
+        --text-main: #2e3338;
+        --text-muted: #4f5660;
+        --border: #e3e5e8;
+        --navbar-bg: #ffffff;
+        --input-bg: #e3e5e8;
+        --table-head: #f2f3f5;
+        --accent: #5865f2;
+        --accent-hover: #4752c4;
+        --danger: #ed4245;
+    }
+
+    [data-theme="dark"] {
+        --bg: #36393f;
+        --card-bg: #2f3136;
+        --text-main: #dcddde;
+        --text-muted: #b9bbbe;
+        --border: #202225;
+        --navbar-bg: #202225;
+        --input-bg: #202225;
+        --table-head: #292b2f;
+    }
+
+    [data-theme="dark"] .table {
+        --bs-table-color: var(--text-main);
+        color: var(--text-main);
+    }
+
+    [data-theme="dark"] .btn-close {
+        filter: invert(1) grayscale(100%) brightness(200%);
+    }
+
+    [data-theme="dark"] .text-muted {
+        color: var(--text-muted) !important;
+    }
+
+    [data-theme="dark"] .modal-body .text-muted {
+        color: #f6f6f7 !important;
+    }
+
+    [data-theme="dark"] .btn-close {
+        filter: invert(1) grayscale(100%) brightness(200%);
+    }
+
+    [data-theme="dark"] .form-select {
+        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23dcddde' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e") !important;
+    }
+
+    [data-theme="dark"] .modal-content {
+        background-color: var(--card-bg);
+        border-color: var(--border);
+    }
+
+    .rounded-circle {
+        border: 1px solid var(--border);
+    }
+
+    body {
+        background: var(--bg);
+        color: var(--text-main);
+        font-family: "gg sans", "Segoe UI", sans-serif;
+        transition: background 0.2s, color 0.2s;
+    }
+
+    .navbar {
+        background: var(--navbar-bg) !important;
+        border-bottom: 1px solid var(--border);
+    }
+
+    .navbar-brand {
+        color: var(--text-main) !important;
+        font-weight: 700;
+    }
+
+    .nav-link,
+    .dropdown-item {
+        color: var(--text-main) !important;
+    }
+
+    .dropdown-menu {
+        background: var(--card-bg);
+        border: 1px solid var(--border);
+    }
+
+    .dropdown-item:hover {
+        background: var(--input-bg);
+    }
+
+    .dropdown-item.text-danger {
+        color: var(--danger) !important;
+    }
+
+    .discord-card {
+        background: var(--card-bg);
+        border: 1px solid var(--border);
+        border-radius: 8px;
+        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+    }
+
+    .form-control,
+    .form-control:focus {
+        background: var(--input-bg);
+        color: var(--text-main);
+        border: none;
+        box-shadow: none;
+    }
+
+    .form-control:focus {
+        outline: 2px solid var(--accent);
+    }
+
+    .form-control::placeholder {
+        color: var(--text-muted);
+    }
+
+    .btn-accent {
+        background: var(--accent);
+        color: #fff;
+        border: none;
+    }
+
+    .btn-accent:hover {
+        background: var(--accent-hover);
+        color: #fff;
+    }
+
+    .btn-danger-discord {
+        background: var(--danger);
+        color: #fff;
+        border: none;
+    }
+
+    .btn-danger-discord:hover {
+        background: #c23235;
+        color: #fff;
+    }
+
+    .price-tag {
+        font-size: 2.8rem;
+        font-weight: 800;
+        color: var(--accent);
+    }
+
+    .table {
+        color: var(--text-main);
+        --bs-table-color: var(--text-main);
+        --bs-table-bg: transparent;
+        --bs-table-border-color: var(--border);
+    }
+
+    #select-all {
+        transform: scale(1.3);
+        margin-top: 2px;
+    }
+
+
+
+    .table thead th {
+        background: var(--table-head);
+        color: var(--text-muted);
+        font-size: 0.72rem;
+        text-transform: uppercase;
+        border-bottom: 1px solid var(--border);
+    }
+
+    .table tbody td {
+        border-bottom: 1px solid var(--border);
+        vertical-align: middle;
+    }
+
+    /* ── Bulk bar ── */
+    .bulk-bar {
+        background: var(--accent);
+        color: #fff;
+        border-radius: 8px;
+    }
+
+    .bulk-bar .form-control {
+        width: 110px;
+        background: rgba(0, 0, 0, 0.2) !important;
+        color: #fff !important;
+        border: 1px solid rgba(255, 255, 255, 0.25) !important;
+    }
+
+    .bulk-bar .form-control::placeholder {
+        color: rgba(255, 255, 255, 0.6);
+    }
+
+    .new-product-prompt {
+        background: var(--accent);
+        color: #fff;
+        border-radius: 8px;
+    }
+
+    #display-img {
+        width: 100%;
+        max-width: 250px;
+        height: auto;
+        max-height: 250px;
+        object-fit: contain;
+    }
+
+    input[type="checkbox"] {
+        cursor: pointer;
+    }
+
+    @media (max-width: 576px) {
+        .col-barcode {
+            display: none;
+        }
+
+        .btn-edit-sm,
+        .btn-del-sm {
+            padding: 4px 7px;
+            font-size: 0.75rem;
+        }
+    }
+
+    .modal-content {
+        background: var(--card-bg);
+        color: var(--text-main);
+        border: 1px solid var(--border);
+    }
+
+    .modal-header,
+    .modal-footer {
+        border-color: var(--border);
+    }
+
+    .btn-close {
+        filter: var(--bs-theme-placeholder, invert(0.7) grayscale(100%) brightness(200%));
+    }
+
+    .form-select {
+        background-color: var(--input-bg) !important;
+        color: var(--text-main) !important;
+        border: none !important;
+        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23adb5bd' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e") !important;
+        background-repeat: no-repeat !important;
+        background-position: right 0.75rem center !important;
+        background-size: 16px 12px !important;
+    }
+
+    .login-box {
+        max-width: 400px;
+        margin: 100px auto;
+        padding: 40px;
+        background: var(--card-bg);
+        border: 1px solid var(--border);
+        border-radius: 8px;
+        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
+    }
+
+    .btn-login {
+        background: var(--accent);
+        color: #fff;
+        font-weight: 600;
+        padding: 10px;
+        border: none;
+    }
+
+    .btn-login:hover {
+        background: var(--accent-hover);
+        color: #fff;
+    }
+
+    .error-alert {
+        background: var(--danger);
+        color: #fff;
+        border-radius: 4px;
+        font-size: 0.9rem;
+    }

static/themeStuff.js

@@ -0,0 +1,39 @@
+function applyTheme(t) {
+    document.documentElement.setAttribute('data-theme', t);
+    localStorage.setItem('theme', t);
+    
+    const isDark = (t === 'dark');
+    const themeIcon = document.getElementById('theme-icon');
+    const themeLabel = document.getElementById('theme-label');
+
+    if (themeIcon) {
+        themeIcon.className = isDark ? 'bi bi-sun me-2' : 'bi bi-moon-stars me-2';
+    }
+    if (themeLabel) {
+        themeLabel.innerText = isDark ? 'Modo Claro' : 'Modo Oscuro';
+    }
+}
+
+function toggleTheme() {
+    const current = document.documentElement.getAttribute('data-theme');
+    applyTheme(current === 'dark' ? 'light' : 'dark');
+}
+
+function initTheme() {
+    const savedTheme = localStorage.getItem('theme');
+    if (savedTheme) {
+        applyTheme(savedTheme);
+    } else {
+        const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
+        applyTheme(prefersDark ? 'dark' : 'light');
+    }
+}
+
+// Listen for system theme changes only if the user hasn't set a manual override
+window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', e => {
+    if (!localStorage.getItem('theme')) {
+        applyTheme(e.matches ? 'dark' : 'light');
+    }
+});
+
+initTheme();

templates/dicom.html

@@ -0,0 +1,378 @@
+{% extends "macros/base.html" %}
+{% from 'macros/modals.html' import confirm_modal %}
+
+{% block title %}Dicom{% endblock %}
+
+{% block content %}
+<div class="row g-3">
+    <div class="col-12">
+        <div class="discord-card p-3">
+            
+            <div class="d-flex justify-content-between align-items-center mb-3 gap-3">
+                <div class="position-relative flex-grow-1">
+                    <input type="text" id="dicom-search" class="form-control ps-5 py-2"
+                        placeholder="Buscar cliente por nombre..." onkeyup="filterDicom()">
+                    <i class="bi bi-search position-absolute top-50 start-0 translate-middle-y ms-3 text-muted"></i>
+                </div>
+                <button class="btn btn-accent text-nowrap py-2 px-3 fw-bold" onclick="openNewModal()">
+                    <i class="bi bi-plus-lg me-1"></i> Nuevo Deudor
+                </button>
+            </div>
+
+            <div class="table-responsive">
+                <table class="table mb-0" id="dicom-table">
+                    <thead>
+                        <tr>
+                            <th style="width: 60px;">Foto</th>
+                            <th>Nombre</th>
+                            <th>Deuda Total</th>
+                            <th>Última Nota</th>
+                            <th>Actualizado</th>
+                            <th class="text-end">Acciones</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for d in debtors %}
+                        <tr>
+                            <td>
+                                {% if d[5] %}
+                                <img src="{{ d[5] }}" class="rounded shadow-sm" style="width: 40px; height: 40px; object-fit: cover; cursor: pointer;" 
+                                    onclick="window.open(this.src, '_blank')">
+                                {% else %}
+                                <div class="bg-secondary rounded" style="width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; opacity: 0.3;">
+                                    <i class="bi bi-person text-white"></i>
+                                </div>
+                                {% endif %}
+                            </td>
+                            <td class="fw-bold align-middle">{{ d[1] }}</td>
+                            <td class="fw-bold price-cell align-middle fs-5" data-value="{{ d[2] }}"></td>
+                            <td class="text-muted small align-middle">{{ d[3] }}</td>
+                            <td class="text-muted small align-middle">{{ d[4] }}</td>
+                            <td class="text-end align-middle">
+                                <button class="btn btn-sm btn-outline-secondary" onclick="openQuickEditModal('{{ d[1] }}', '{{ d[3] }}')"
+                                    title="Actualizar Deuda">
+                                    <i class="bi bi-pencil"></i>
+                                </button>
+                                <button class="btn btn-sm btn-outline-danger ms-1"
+                                    onclick="forgiveDebt({{ d[0] }}, '{{ d[1] }}')" title="Eliminar Registro">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    </div>
+</div>
+
+<div class="modal fade" id="dicomModal" tabindex="-1" data-bs-backdrop="static">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+            <div class="modal-header border-0 pb-0">
+                <h5 class="modal-title w-100 text-center text-muted text-uppercase" style="font-size: 0.8rem;" id="dicomModalTitle">
+                    Registrar Movimiento
+                </h5>
+                <button type="button" class="btn-close position-absolute end-0 top-0 m-3" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body pt-2 pb-4">
+                
+                <div class="mb-3">
+                    <label class="small text-muted mb-1">Nombre del Cliente</label>
+                    <input type="text" id="dicom-name" class="form-control form-control-lg fw-bold" placeholder="Ej: Doña Juanita">
+                </div>
+                
+                <div class="mb-3">
+                    <label class="small text-muted mb-1">Monto (CLP)</label>
+                    <input type="number" id="dicom-amount" class="form-control form-control-lg text-center fw-bold fs-4" placeholder="$0">
+                </div>
+
+                <div class="mb-3">
+                    <label class="small text-muted mb-1">Nota (Opcional)</label>
+                    <input type="text" id="dicom-notes" class="form-control" placeholder="Ej: Pan y bebida"
+                        onkeydown="if(event.key === 'Enter') submitDicom('add')">
+                </div>
+
+                <div class="mb-4">
+                    <label class="small text-muted mb-1">Foto / Comprobante (Opcional)</label>
+                    <div class="input-group">
+                        <input type="text" id="dicom-image-url" class="form-control" placeholder="URL de imagen" readonly>
+                        <input type="file" id="dicom-camera-input" accept="image/*" capture="environment" style="display: none;"
+                            onchange="handleDicomUpload(this)">
+                        <button class="btn btn-outline-secondary" type="button"
+                            onclick="document.getElementById('dicom-camera-input').click()">
+                            <i class="bi bi-camera"></i>
+                        </button>
+                    </div>
+                    <div id="dicom-img-preview-container" class="mt-2 text-center d-none">
+                        <img id="dicom-img-preview" src="" class="img-thumbnail rounded" style="max-height: 120px; border-color: var(--border);">
+                    </div>
+                </div>
+
+                <div class="d-flex gap-2">
+                    <button class="btn btn-danger flex-grow-1 py-3 fw-bold" onclick="submitDicom('add')">
+                        <i class="bi bi-cart-plus me-1"></i> Fiar
+                    </button>
+                    <button class="btn btn-success flex-grow-1 py-3 fw-bold" onclick="submitDicom('pay')">
+                        <i class="bi bi-cash-coin me-1"></i> Abonar
+                    </button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<div class="modal fade" id="quickEditModal" tabindex="-1">
+    <div class="modal-dialog modal-dialog-centered modal-sm">
+        <div class="modal-content">
+            <div class="modal-header border-0 pb-0">
+                <h5 class="modal-title w-100 text-center text-muted text-uppercase" style="font-size: 0.8rem;">
+                    Actualizar Deuda
+                </h5>
+                <button type="button" class="btn-close position-absolute end-0 top-0 m-3" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body text-center pt-1 pb-4">
+                <h4 id="quick-edit-name" class="mb-3 fw-bold" style="color: var(--text-main);"></h4>
+                <div class="mb-3 text-start">
+                    <label class="text-muted small mb-1">Monto a agregar/restar (CLP)</label>
+                    <input type="number" id="quick-edit-amount" class="form-control form-control-lg text-center fw-bold fs-4" placeholder="$0"
+                           onkeydown="if(event.key === 'Enter') submitQuickEdit('add')">
+                </div>
+                <div class="mb-4 text-start">
+                    <label class="text-muted small mb-1">Nota Actualizada</label>
+                    <input type="text" id="quick-edit-notes" class="form-control" placeholder="Ej: Pan y bebida"
+                           onkeydown="if(event.key === 'Enter') submitQuickEdit('add')">
+                </div>
+                <div class="d-flex gap-2">
+                    <button class="btn btn-danger flex-grow-1 py-2 fw-bold" onclick="submitQuickEdit('add')">
+                        <i class="bi bi-cart-plus me-1"></i> Fiar
+                    </button>
+                    <button class="btn btn-success flex-grow-1 py-2 fw-bold" onclick="submitQuickEdit('pay')">
+                        <i class="bi bi-cash-coin me-1"></i> Abonar
+                    </button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+{% call confirm_modal('deleteDebtModal', 'Eliminar Registro', 'btn-danger', 'Eliminar Permanente', 'executeForgiveDebt()') %}
+    <div class="text-center">
+        <i class="bi bi-exclamation-triangle-fill text-danger mb-3" style="font-size: 3rem;"></i>
+        <p class="mb-1">¿Estás seguro de que quieres perdonar la deuda y eliminar completamente a <strong id="deleteDebtName" style="color: var(--text-main);"></strong> del registro?</p>
+        <p class="text-muted small">Esta acción no se puede deshacer.</p>
+    </div>
+{% endcall %}
+{% endblock %}
+
+{% block scripts %}
+<script>
+    const clp = new Intl.NumberFormat('es-CL', { style: 'currency', currency: 'CLP', minimumFractionDigits: 0 });
+
+    // Format debts and flip colors (Negative = Debt/Red, Positive = Credit/Green)
+    document.querySelectorAll('.price-cell').forEach(td => {
+        const val = parseFloat(td.getAttribute('data-value'));
+        td.innerText = clp.format(val);
+
+        if (val < 0) {
+            td.classList.add('text-danger');
+        } else if (val > 0) {
+            td.classList.add('text-success');
+        } else {
+            td.classList.add('text-muted');
+        }
+    });
+
+    // Modal Control Functions
+    function openNewModal() {
+        clearDicomForm();
+        bootstrap.Modal.getOrCreateInstance(document.getElementById('dicomModal')).show();
+        setTimeout(() => document.getElementById('dicom-name').focus(), 500);
+    }
+
+    let currentQuickEditName = '';
+
+    function openQuickEditModal(name, notes) {
+        currentQuickEditName = name;
+        
+        document.getElementById('quick-edit-name').innerText = name;
+        document.getElementById('quick-edit-amount').value = '';
+        
+        // Inject the existing note directly into the new input field
+        document.getElementById('quick-edit-notes').value = notes || ''; 
+        
+        const modal = bootstrap.Modal.getOrCreateInstance(document.getElementById('quickEditModal'));
+        modal.show();
+        
+        setTimeout(() => document.getElementById('quick-edit-amount').focus(), 500);
+    }
+
+    async function submitQuickEdit(action) {
+        const amount = document.getElementById('quick-edit-amount').value;
+        const notes = document.getElementById('quick-edit-notes').value; // Grab the newly edited note
+        
+        if (!amount || amount <= 0 || isNaN(amount)) {
+            alert('Ingresa un monto válido mayor a 0.');
+            return;
+        }
+
+        try {
+            const res = await fetch('/api/dicom/update', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ 
+                    name: currentQuickEditName, 
+                    amount: amount, 
+                    notes: notes, // Send the UI value instead of the background variable
+                    action: action, 
+                    image_url: '' 
+                }) 
+            });
+            
+            if (res.ok) {
+                bootstrap.Modal.getInstance(document.getElementById('quickEditModal')).hide();
+                window.location.reload();
+            } else {
+                alert("Error al actualizar la deuda.");
+            }
+        } catch (e) { alert("Error de conexión."); }
+    }
+
+    function clearDicomForm() {
+        document.getElementById('dicom-name').value = '';
+        document.getElementById('dicom-amount').value = '';
+        document.getElementById('dicom-notes').value = '';
+        document.getElementById('dicom-image-url').value = ''; 
+        document.getElementById('dicom-img-preview-container').classList.add('d-none'); 
+    }
+
+    // Image Compression & Upload
+    function compressImage(file, maxWidth, quality) {
+        return new Promise((resolve, reject) => {
+            const reader = new FileReader();
+            reader.readAsDataURL(file);
+            reader.onload = event => {
+                const img = new Image();
+                img.src = event.target.result;
+                img.onload = () => {
+                    const canvas = document.createElement('canvas');
+                    let width = img.width;
+                    let height = img.height;
+                    if (width > maxWidth) {
+                        height = Math.round((height * maxWidth) / width);
+                        width = maxWidth;
+                    }
+                    canvas.width = width;
+                    canvas.height = height;
+                    const ctx = canvas.getContext('2d');
+                    ctx.drawImage(img, 0, 0, width, height);
+                    canvas.toBlob(blob => resolve(blob), 'image/jpeg', quality);
+                };
+            };
+        });
+    }
+
+    async function handleDicomUpload(input) {
+        const name = document.getElementById('dicom-name').value.trim();
+        if (!name) {
+            alert("Primero ingresa el nombre del cliente arriba para asociar la foto.");
+            input.value = '';
+            return;
+        }
+
+        const file = input.files[0];
+        if (!file) return;
+
+        try {
+            const compressedBlob = await compressImage(file, 800, 0.7);
+            const formData = new FormData();
+            formData.append('image', compressedBlob, `debt_${name}_${Date.now()}.jpg`);
+            formData.append('barcode', `debt_${name}`); 
+
+            const res = await fetch('/upload_image', { method: 'POST', body: formData });
+            const data = await res.json();
+
+            if (res.ok) {
+                document.getElementById('dicom-image-url').value = data.image_url;
+                document.getElementById('dicom-img-preview').src = data.image_url;
+                document.getElementById('dicom-img-preview-container').classList.remove('d-none');
+            }
+        } catch (e) {
+            alert("Error procesando imagen.");
+        }
+    }
+
+    // Database Actions
+    async function submitDicom(action) {
+        const name = document.getElementById('dicom-name').value.trim();
+        const amount = document.getElementById('dicom-amount').value;
+        const notes = document.getElementById('dicom-notes').value;
+        const image_url = document.getElementById('dicom-image-url').value; 
+
+        if (!name || amount <= 0 || isNaN(amount)) {
+            alert('Ingresa un nombre y monto válido mayor a 0.');
+            return;
+        }
+
+        try {
+            const res = await fetch('/api/dicom/update', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ name, amount, notes, action, image_url }) 
+            });
+            if (res.ok) {
+                bootstrap.Modal.getInstance(document.getElementById('dicomModal')).hide();
+                window.location.reload();
+            } else {
+                alert("Error al guardar en la base de datos.");
+            }
+        } catch (e) { alert("Error de conexión."); }
+    }
+
+    let debtIdToDelete = null;
+
+    function forgiveDebt(id, name) {
+        debtIdToDelete = id;
+        document.getElementById('deleteDebtName').innerText = name;
+        bootstrap.Modal.getOrCreateInstance(document.getElementById('deleteDebtModal')).show();
+    }
+
+    async function executeForgiveDebt() {
+        if (!debtIdToDelete) return;
+        
+        try {
+            const res = await fetch(`/api/dicom/${debtIdToDelete}`, { method: 'DELETE' });
+            if (res.ok) {
+                window.location.reload();
+            } else {
+                alert("Error al eliminar el registro.");
+            }
+        } catch (e) { 
+            alert("Error de conexión."); 
+        } finally {
+            bootstrap.Modal.getInstance(document.getElementById('deleteDebtModal')).hide();
+        }
+    }
+    
+    // Global listener to accept with the Enter key
+    document.addEventListener('keydown', function(event) {
+        if (event.key === 'Enter') {
+            const deleteModal = document.getElementById('deleteDebtModal');
+            if (deleteModal && deleteModal.classList.contains('show')) {
+                event.preventDefault();
+                executeForgiveDebt();
+            }
+        }
+    });
+
+    // Search
+    function filterDicom() {
+        const q = document.getElementById('dicom-search').value.toLowerCase();
+        document.querySelectorAll('#dicom-table tbody tr').forEach(row => {
+            const name = row.cells[1].innerText.toLowerCase(); // Index 1 is the name column
+            row.style.display = name.includes(q) ? '' : 'none';
+        });
+    }
+</script>
+{% endblock %}

templates/index.html

@@ -1,243 +0,0 @@
-<!DOCTYPE html>
-<html lang="es">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>SekiPOS - Inventory Management</title>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
-    <style>
-        body { 
-            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
-            display: flex; 
-            flex-direction: column;
-            padding: 20px; 
-            background: #f4f7f6; 
-            color: #333;
-            margin: 0;
-        }
-        .header-bar {
-            display: flex;
-            justify-content: space-between;
-            align-items: center;
-            background: white;
-            padding: 10px 25px;
-            border-radius: 10px;
-            margin-bottom: 20px;
-            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
-        }
-        .main-container { display: flex; gap: 25px; }
-        .column { flex: 1; min-width: 400px; }
-        .card { 
-            background: white; 
-            padding: 25px; 
-            border-radius: 15px; 
-            box-shadow: 0 10px 25px rgba(0,0,0,0.05); 
-            text-align: center;
-            margin-bottom: 20px;
-        }
-        #display-img { 
-            max-width: 250px; 
-            max-height: 250px;
-            border-radius: 10px; 
-            margin-bottom: 15px; 
-            object-fit: contain;
-        }
-        .price-tag { font-size: 3em; color: #2c3e50; font-weight: 800; margin: 10px 0; }
-        input { 
-            display: block; 
-            width: 100%; 
-            margin: 12px 0; 
-            padding: 12px; 
-            border: 1px solid #ddd; 
-            border-radius: 8px;
-            box-sizing: border-box;
-        }
-        button { padding: 10px 15px; cursor: pointer; border-radius: 6px; border: none; transition: 0.2s; }
-        .btn-save { background: #2c3e50; color: white; width: 100%; font-size: 1.1em; }
-        .btn-save:hover { background: #34495e; }
-        .btn-edit { background: #f1c40f; color: #000; }
-        .btn-del { background: #e74c3c; color: white; }
-        
-        table { width: 100%; border-collapse: collapse; background: white; border-radius: 10px; overflow: hidden; }
-        th, td { padding: 15px; border-bottom: 1px solid #eee; text-align: left; }
-        th { background: #fafafa; }
-
-    #new-product-prompt {
-        display: none;
-        background: #3498db;
-        color: white;
-        padding: 12px 20px;
-        border-radius: 10px;
-        margin-bottom: 20px;
-        animation: slideDown 0.4s ease;
-        
-        /* This is what you were missing */
-        display: none; /* JS will change this to flex */
-        justify-content: space-between;
-        align-items: center; 
-    }
-
-        @keyframes slideDown {
-            from { transform: translateY(-20px); opacity: 0; }
-            to { transform: translateY(0); opacity: 1; }
-        }
-    </style>
-</head>
-<body>
-
-    <div class="header-bar">
-        <h2 style="margin:0;">SekiPOS v1.0</h2>
-        <div>
-            <span>Usuario: <b>{{ user.username }}</b></span> | 
-            <a href="/logout" style="color: #e74c3c; text-decoration: none; font-weight: bold;">Cerrar Sesión</a>
-        </div>
-    </div>
-
-    <div class="main-container">
-        <div class="column">
-            <!-- Notification for New Items -->
-            <div id="new-product-prompt">
-                <span style="flex-grow: 1;">¡Nuevo! Barcode <b><span id="new-barcode-display"></span></b>. ¿Deseas agregarlo?</span>
-                <button onclick="dismissPrompt()" style="background:rgba(255,255,255,0.2); color:white; margin-left: 15px;">Omitir</button>
-            </div>
-
-            <!-- Visual Display Card -->
-            <div class="card" id="scan-display">
-                <h2 style="color: #7f8c8d; margin-top:0;">Último Escaneado</h2>
-                <img id="display-img" src="./static/placeholder.png" alt="Producto">
-                <h1 id="display-name" style="margin: 10px 0;">Escanea un producto</h1>
-                <div class="price-tag" id="display-price">$0</div>
-                <p id="display-barcode" style="color: #bdc3c7; font-family: monospace;"></p>
-            </div>
-
-            <!-- Form Card -->
-            <div class="card">
-                <h3 id="form-title" style="margin-top:0;">Agregar/Editar Producto</h3>
-                <form action="/upsert" method="POST" id="product-form">
-                    <input type="text" name="barcode" id="form-barcode" placeholder="Barcode" required>
-                    <input type="text" name="name" id="form-name" placeholder="Nombre del Producto" required>
-                    <input type="number" name="price" id="form-price" placeholder="Precio (CLP)" required>
-                    <input type="text" name="image_url" id="form-image" placeholder="URL de Imagen">
-                    <button type="submit" class="btn-save">Guardar en Inventario</button>
-                </form>
-            </div>
-        </div>
-
-        <div class="column">
-            <div class="card">
-                <h3 style="text-align: left; margin-top:0;">Inventario</h3>
-                <input type="text" id="searchInput" onkeyup="searchTable()" placeholder="Buscar por nombre o código...">
-                
-                <table id="inventoryTable">
-                    <thead>
-                        <tr>
-                            <th>Código</th>
-                            <th>Nombre</th>
-                            <th>Precio</th>
-                            <th>Acciones</th>
-                        </tr>
-                    </thead>
-                    <tbody>
-                        {% for p in products %}
-                        <tr>
-                            <td style="font-family: monospace;">{{ p[0] }}</td>
-                            <td>{{ p[1] }}</td>
-                            <td class="price-cell" data-value="{{ p[2] }}"></td>
-                            <td style="white-space: nowrap;">
-                                <button class="btn-edit" onclick="editProduct('{{ p[0] }}', '{{ p[1] }}', '{{ p[2] }}', '{{ p[3] }}')">Editar</button>
-                                <form action="/delete/{{ p[0] }}" method="POST" style="display:inline;">
-                                    <button type="submit" class="btn-del" onclick="return confirm('¿Eliminar producto?')">Borrar</button>
-                                </form>
-                            </td>
-                        </tr>
-                        {% endfor %}
-                    </tbody>
-                </table>
-            </div>
-        </div>
-    </div>
-
-    <script>
-        var socket = io();
-
-        // Chilean Peso Formatter (e.g., 1500 -> $1.500)
-        const clpFormatter = new Intl.NumberFormat('es-CL', {
-            style: 'currency',
-            currency: 'CLP',
-            minimumFractionDigits: 0
-        });
-
-        function formatTablePrices() {
-            document.querySelectorAll('.price-cell').forEach(td => {
-                const val = parseFloat(td.getAttribute('data-value'));
-                td.innerText = clpFormatter.format(val);
-            });
-        }
-        formatTablePrices();
-
-        socket.on('new_scan', function(data) {
-            dismissPrompt();
-            document.getElementById('display-name').innerText = data.name;
-            document.getElementById('display-price').innerText = clpFormatter.format(data.price);
-            document.getElementById('display-barcode').innerText = data.barcode;
-            document.getElementById('display-img').src = data.image || './static/placeholder.png';
-        });
-
-        socket.on('scan_error', function(data) {
-            const prompt = document.getElementById('new-product-prompt');
-            document.getElementById('new-barcode-display').innerText = data.barcode;
-            document.getElementById('display-price').innerText = "$ ???";
-            prompt.style.display = 'flex';
-            
-            // Update big display card with internet data (if any)
-            if (data.name) {
-                document.getElementById('display-name').innerText = data.name + " (Nuevo)";
-                document.getElementById('display-price').innerText = "$ ???";
-                document.getElementById('display-img').src = data.image || './static/placeholder.png';
-            } else {
-                document.getElementById('display-name').innerText = "Producto Desconocido";
-                document.getElementById('display-img').src = './static/placeholder.png';
-            }
-            document.getElementById('display-barcode').innerText = data.barcode;
-
-            // Pre-fill form
-            document.getElementById('form-barcode').value = data.barcode;
-            document.getElementById('form-name').value = data.name || '';
-            document.getElementById('form-image').value = data.image || '';
-            document.getElementById('form-price').value = '';
-            document.getElementById('form-title').innerText = "Crear Nuevo: " + (data.name || data.barcode);
-            document.getElementById('form-price').focus();
-        });
-
-        function dismissPrompt() {
-            document.getElementById('new-product-prompt').style.display = 'none';
-        }
-
-        function editProduct(barcode, name, price, image) {
-            dismissPrompt();
-            document.getElementById('form-barcode').value = barcode;
-            document.getElementById('form-name').value = name;
-            document.getElementById('form-price').value = price;
-            document.getElementById('form-image').value = image;
-            document.getElementById('form-title').innerText = "Editando: " + name;
-            window.scrollTo({top: 0, behavior: 'smooth'});
-        }
-
-        function searchTable() {
-            var input = document.getElementById("searchInput");
-            var filter = input.value.toUpperCase();
-            var tr = document.getElementById("inventoryTable").getElementsByTagName("tr");
-
-            for (var i = 1; i < tr.length; i++) {
-                var content = tr[i].textContent || tr[i].innerText;
-                tr[i].style.display = content.toUpperCase().indexOf(filter) > -1 ? "" : "none";
-            }
-        }
-
-        // Handle instant updates for deletions without full refresh
-        socket.on('product_deleted', function(data) {
-            window.location.reload(); 
-        });
-    </script>
-</body>
-</html>

templates/inventory.html

@@ -0,0 +1,757 @@
+{% extends "macros/base.html" %}
+{% from 'macros/modals.html' import confirm_modal, scanner_modal %}
+
+{% block title %}Inventario{% endblock %}
+
+{% block head %}
+<script src="https://unpkg.com/html5-qrcode"></script>
+<style>
+    .table th:last-child, 
+    .table td:last-child {
+        width: 1%;
+        white-space: nowrap;
+        text-align: right;
+    }
+
+    .name-cell {
+        max-width: 200px; /* Adjust based on preference */
+        word-wrap: break-word;
+        overflow: hidden;
+        text-overflow: ellipsis;
+    }
+
+    @media (min-width: 992px) {
+        .name-cell {
+            max-width: 400px;
+        }
+    }
+
+    .sort-asc::after {
+        content: " ↓";
+        font-size: 0.8rem;
+    }
+
+    .sort-desc::after {
+        content: " ↑";
+        font-size: 0.8rem;
+    }
+
+    th[onclick] {
+        cursor: pointer;
+        user-select: none;
+    }
+
+    th[onclick]:hover {
+        background-color: var(--input-bg) !important;
+    }
+</style>
+{% endblock %}
+
+{% block content %}
+<div class="row g-3">
+
+    <!-- ── LEFT COLUMN ── -->
+    <div class="col-12 col-lg-5">
+
+        <!-- New product prompt -->
+        <div id="new-product-prompt"
+            class="new-product-prompt p-3 mb-3 d-none d-flex justify-content-between align-items-center">
+            <span>Nuevo: <b id="new-barcode-display"></b></span>
+            <button onclick="dismissPrompt()" class="btn btn-sm" style="background:rgba(0,0,0,0.25);color:#fff;">
+                Omitir
+            </button>
+        </div>
+
+        <!-- Last scanned card -->
+        <div class="discord-card p-3 mb-3 text-center">
+            <p class="mb-1 fw-semibold"
+                style="color:var(--text-muted); font-size:0.8rem; text-transform:uppercase; letter-spacing:.05em;">
+                Último Escaneado</p>
+            <img id="display-img" src="./static/placeholder.png" class="mb-2" alt="product">
+            <h5 id="display-name" class="mb-1">Esperando scan...</h5>
+            <div class="price-tag" id="display-price">$0</div>
+            <p id="display-barcode" class="mb-0 mt-1" style="font-family:monospace; opacity:.5; font-size:.8rem;">
+            </p>
+        </div>
+
+        <button class="btn btn-accent mb-3 w-100" onclick="startScanner()">
+            <i class="bi bi-qr-code-scan me-2"></i>Escanear con Cámara
+        </button>
+
+        <!-- Edit / Create card -->
+        <div class="discord-card p-3">
+            <h6 id="form-title" class="mb-3 fw-bold">Editar / Crear</h6>
+            <form action="/upsert" method="POST" id="product-form">
+                <input class="form-control mb-2" type="text" name="barcode" id="form-barcode" placeholder="Barcode"
+                    required>
+                <input class="form-control mb-2" type="text" name="name" id="form-name" placeholder="Nombre" required>
+
+                <div class="row g-2 mb-2">
+                    <div class="col-8">
+                        <input class="form-control" type="number" name="price" id="form-price"
+                            placeholder="Precio (CLP)" required>
+                    </div>
+                    <div class="col-4">
+                        <select class="form-select" name="unit_type" id="form-unit-type">
+                            <option value="unit">Unidad</option>
+                            <option value="kg">Kg</option>
+                        </select>
+                    </div>
+                </div>
+
+                <input class="form-control mb-2" type="number" step="1" name="stock" id="form-stock"
+                    placeholder="Stock Inicial">
+
+                <div class="input-group mb-3">
+                    <input class="form-control" type="text" name="image_url" id="form-image" placeholder="URL Imagen">
+                    <input type="file" id="camera-input" accept="image/*" capture="environment" style="display: none;"
+                        onchange="handleFileUpload(this)">
+                    <button class="btn btn-outline-secondary" type="button"
+                        onclick="document.getElementById('camera-input').click()">
+                        <i class="bi bi-camera"></i>
+                    </button>
+                </div>
+
+                <div class="d-flex gap-2">
+                    <button type="submit" class="btn btn-accent flex-grow-1">
+                        <i class="bi bi-floppy me-1"></i>Guardar
+                    </button>
+                    <button type="button" class="btn btn-secondary" onclick="clearForm()">
+                        <i class="bi bi-eraser"></i>
+                    </button>
+                </div>
+            </form>
+        </div>
+    </div>
+
+    <!-- ── RIGHT COLUMN ── -->
+    <div class="col-12 col-lg-7">
+        <div class="discord-card p-3">
+
+            <!-- Bulk actions bar -->
+            <div id="bulk-bar" class="bulk-bar p-2 mb-3 d-flex justify-content-between align-items-center">
+                <span><b id="selected-count">0</b> seleccionados</span>
+                <div class="d-flex align-items-center gap-2">
+                    <input type="number" id="bulk-price-input" class="form-control form-control-sm"
+                        placeholder="Precio">
+                    <button onclick="applyBulkPrice()" class="btn btn-sm"
+                        style="background:#fff; color:var(--accent); font-weight:600;">OK</button>
+                    <button onclick="applyBulkDelete()" class="btn btn-sm btn-danger-discord">
+                        <i class="bi bi-trash"></i>
+                    </button>
+                    <button onclick="clearSelection()" class="btn btn-sm"
+                        style="background: rgba(255,255,255,0.2); color:#fff;">
+                        <i class="bi bi-x-lg"></i>
+                    </button>
+                </div>
+            </div>
+
+            <!-- Search -->
+            <div class="position-relative mb-3">
+                <input type="text" id="searchInput" class="form-control pe-5" onkeyup="searchTable()"
+                    placeholder="Filtrar productos...">
+                <button class="btn btn-link position-absolute end-0 top-50 translate-middle-y text-muted"
+                    onclick="clearSearch()" id="clearSearchBtn" style="display: none; text-decoration: none;">
+                    <i class="bi bi-x-lg"></i>
+                </button>
+            </div>
+
+            <!-- Table -->
+            <div class="table-responsive">
+                <table class="table table-borderless mb-0" id="inventoryTable">
+                    <thead>
+                        <tr>
+                            <th style="width:36px;"><input class="form-check-input" type="checkbox" id="select-all"
+                                    onclick="toggleAll(this)"></th>
+                            <th class="col-barcode" onclick="sortTable(1)">Código</th>
+                            <th onclick="sortTable(2)">Nombre</th>
+                            <th onclick="sortTable(3)">Stock</th>
+                            <th onclick="sortTable(4)">Precio</th>
+                            <th>Acciones</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for p in products %}
+                        <tr data-barcode="{{ p[0] }}">
+                            <td><input class="form-check-input product-checkbox" type="checkbox"
+                                    onclick="updateBulkBar()"></td>
+                            <td class="col-barcode">{{ p[0] }}</td>
+                            <td class="name-cell">{{ p[1] }}</td>
+                            <td>
+                                {% if p[5] == 'kg' %}
+                                <span class="text-muted d-inline-block text-center" style="width: 45px;">-</span>
+                                {% else %}
+                                {{ p[4] | int }} <small class="text-muted">Uni</small>
+                                {% endif %}
+                            </td>
+                            <td class="price-cell" data-value="{{ p[2] }}"></td>
+                            <td class="text-nowrap">
+                                <button class="btn btn-accent btn-sm"
+                                    onclick="editProduct('{{ p[0] }}', '{{ p[1] }}', '{{ p[2] }}', '{{ p[3] }}', '{{ p[4] }}', '{{ p[5] }}')"
+                                    data-bs-toggle="modal" data-bs-target="#editModal">
+                                    <i class="bi bi-pencil"></i>
+                                </button>
+                                <button class="btn btn-danger-discord btn-sm btn-del-sm" data-bs-toggle="modal"
+                                    data-bs-target="#deleteModal" data-barcode="{{ p[0] }}" data-name="{{ p[1] }}">
+                                    <i class="bi bi-trash"></i>
+                                </button>
+                            </td>
+                        </tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    </div>
+</div>
+
+{% call confirm_modal('editModal', 'Editar Producto', 'btn-accent', 'Editar', 'confirmEdit()') %}
+<p>¿Quieres editar <strong id="editProductName"></strong>?</p>
+{% endcall %}
+
+{% call confirm_modal('deleteModal', 'Eliminar Producto', 'btn-danger-discord', 'Eliminar', 'confirmDelete()') %}
+<p>¿Seguro que quieres eliminar <strong id="deleteProductName"></strong>?</p>
+<p class="text-muted small">Esta acción no se puede deshacer.</p>
+{% endcall %}
+
+{% call confirm_modal('bulkConfirmModal', 'Confirmar Cambio Masivo', 'btn-accent', 'Confirmar Cambios',
+'executeBulkPrice()') %}
+<div class="text-center">
+    <i class="bi bi-exclamation-triangle text-warning" style="font-size: 3rem;"></i>
+    <p class="mt-3">Vas a actualizar <strong id="bulk-count-text">0</strong> productos al precio de <strong
+            id="bulk-price-text"></strong>.</p>
+</div>
+{% endcall %}
+
+{% call confirm_modal('bulkDeleteModal', 'Confirmar Eliminación Masiva', 'btn-danger-discord', 'Eliminar
+permanentemente', 'executeBulkDelete()') %}
+<div class="text-center">
+    <i class="bi bi-exclamation-octagon text-danger" style="font-size: 3rem;"></i>
+    <p class="mt-3">Vas a eliminar <strong id="bulk-delete-count">0</strong> productos permanentemente.</p>
+    <p class="text-muted small">Esta acción borrará los datos y las imágenes de la caché.</p>
+</div>
+{% endcall %}
+
+{{ scanner_modal() }}
+{% endblock %}
+
+{% block scripts %}
+<script>
+    /* ── Socket.IO ── */
+    const socket = io();
+    const clp = new Intl.NumberFormat('es-CL', { style: 'currency', currency: 'CLP', minimumFractionDigits: 0 });
+
+    function formatAll() {
+        document.querySelectorAll('.price-cell').forEach(td => {
+            td.innerText = clp.format(td.getAttribute('data-value'));
+        });
+    }
+    formatAll();
+
+    // Inside socket.on('new_scan')
+    socket.on('new_scan', d => {
+        // Update the "Last Scanned" card
+        document.getElementById('display-name').innerText = d.name;
+        document.getElementById('display-price').innerText = clp.format(d.price);
+        document.getElementById('display-barcode').innerText = d.barcode;
+        document.getElementById('display-img').src = d.image || './static/placeholder.png';
+
+        let title = 'Editando: ' + d.name;
+        if (d.note) title += ` (${d.note})`;
+
+        // Update the actual form
+        updateForm(d.barcode, d.name, d.price, d.image, title, d.stock, d.unit_type);
+    });
+
+    socket.on('scan_error', d => {
+        const prompt = document.getElementById('new-product-prompt');
+        document.getElementById('new-barcode-display').innerText = d.barcode;
+        prompt.classList.remove('d-none');
+
+        // Update the "Last Scanned" card so it doesn't show old data
+        document.getElementById('display-name').innerText = d.name || "Producto Nuevo";
+        document.getElementById('display-price').innerText = clp.format(0);
+        document.getElementById('display-barcode').innerText = d.barcode;
+        document.getElementById('display-img').src = d.image || './static/placeholder.png';
+
+        // Clear the price and set the name in the form
+        updateForm(d.barcode, d.name || '', '', d.image || '', 'Crear: ' + d.barcode);
+    });
+
+    socket.on('scale_update', function (data) {
+        console.log("Current Weight:", data.grams + "g");
+        // If the unit type is 'kg', update the stock field automatically
+        const unitType = document.getElementById('form-unit-type').value;
+        if (unitType === 'kg') {
+            document.getElementById('form-stock').value = data.kilograms;
+        }
+    });
+
+    socket.on('scale_update', function (data) {
+        const unitType = document.getElementById('form-unit-type').value;
+        if (unitType === 'kg') {
+            document.getElementById('form-stock').value = data.kilograms;
+        }
+    });
+
+    // Replace your existing updateForm function with this one
+    function updateForm(b, n, p, i, t, stock, unit) {
+        dismissPrompt();
+        document.getElementById('form-barcode').value = b;
+        document.getElementById('form-name').value = n;
+
+        // Force integers here to nuke the decimals once and for all
+        document.getElementById('form-price').value = p ? parseInt(p, 10) : '';
+        document.getElementById('form-stock').value = stock ? parseInt(stock, 10) : 0;
+
+        document.getElementById('form-unit-type').value = unit || 'unit';
+        document.getElementById('form-image').value = i || '';
+        document.getElementById('form-title').innerText = t;
+
+        // Add a timestamp to the URL if it's a local cache image
+        let displayImg = i || './static/placeholder.png';
+        if (displayImg.includes('/static/cache/')) {
+            displayImg += (displayImg.includes('?') ? '&' : '?') + 't=' + Date.now();
+        }
+
+        document.getElementById('form-image').value = i || '';
+        document.getElementById('form-title').innerText = t;
+        document.getElementById('display-img').src = displayImg;
+        document.getElementById('display-name').innerText = n || 'Producto Nuevo';
+        document.getElementById('display-price').innerText = clp.format(p || 0);
+        document.getElementById('display-barcode').innerText = b;
+
+        toggleStockInput(); // Show/hide stock input based on unit type
+    }
+
+    function dismissPrompt() {
+        document.getElementById('new-product-prompt').classList.add('d-none');
+    }
+
+    function editProduct(b, n, p, i, stock, unit) {
+        document.getElementById('editProductName').innerText = n;
+        const modal = document.getElementById('editModal');
+        modal.dataset.barcode = b;
+        modal.dataset.name = n;
+        modal.dataset.price = p;
+        modal.dataset.image = i;
+        modal.dataset.stock = stock;
+        modal.dataset.unit = unit;
+    }
+
+    function confirmEdit() {
+        const m = document.getElementById('editModal');
+        updateForm(m.dataset.barcode, m.dataset.name, m.dataset.price, m.dataset.image, 'Editando: ' + m.dataset.name, m.dataset.stock, m.dataset.unit);
+        window.scrollTo({ top: 0, behavior: 'smooth' });
+        bootstrap.Modal.getInstance(m).hide();
+    }
+
+    function confirmDelete() {
+        const modal = document.getElementById('deleteModal');
+        const form = document.createElement('form');
+        form.action = `/delete/${modal.dataset.barcode}`;
+        form.method = 'POST';
+        form.style.display = 'none';
+        document.body.appendChild(form);
+        form.submit();
+    }
+
+    // Delete modal setup
+    document.getElementById('deleteModal').addEventListener('show.bs.modal', e => {
+        const button = e.relatedTarget;
+        document.getElementById('deleteProductName').innerText = button.dataset.name;
+        document.getElementById('deleteModal').dataset.barcode = button.dataset.barcode;
+    });
+
+    /* ── Bulk selection ── */
+    function toggleAll(src) {
+        const visibleRows = document.querySelectorAll('#inventoryTable tbody tr:not([style*="display: none"])');
+        visibleRows.forEach(row => {
+            const cb = row.querySelector('.product-checkbox');
+            if (cb) cb.checked = src.checked;
+        });
+        updateBulkBar();
+    }
+
+    function updateBulkBar() {
+        document.getElementById('selected-count').innerText =
+            document.querySelectorAll('.product-checkbox:checked').length;
+    }
+
+    function clearForm() {
+        document.getElementById('product-form').reset();
+        document.getElementById('form-title').innerText = 'Editar / Crear';
+        // Reset preview card
+        document.getElementById('display-img').src = './static/placeholder.png';
+        document.getElementById('display-name').innerText = 'Esperando scan...';
+        document.getElementById('display-price').innerText = '$0';
+        document.getElementById('display-barcode').innerText = '';
+
+        toggleStockInput(); // Show/hide stock input based on default unit type
+    }
+
+    async function handleFileUpload(input) {
+        const barcode = document.getElementById('form-barcode').value;
+        if (!barcode) {
+            alert("Primero escanea o ingresa un código de barras.");
+            input.value = '';
+            return;
+        }
+
+        const file = input.files[0];
+        if (!file) return;
+
+        // Show a "loading" state if you feel like being fancy
+        const originalBtnContent = document.querySelector('button[onclick*="camera-input"]').innerHTML;
+        document.querySelector('button[onclick*="camera-input"]').innerHTML = '<span class="spinner-border spinner-border-sm"></span>';
+
+        try {
+            const compressedBlob = await compressImage(file, 800, 0.7); // Max 800px, 70% quality
+
+            const formData = new FormData();
+            formData.append('image', compressedBlob, `photo_${barcode}.jpg`);
+            formData.append('barcode', barcode);
+
+            const res = await fetch('/upload_image', {
+                method: 'POST',
+                body: formData
+            });
+            const data = await res.json();
+
+            if (res.ok) {
+                document.getElementById('form-image').value = data.image_url;
+                document.getElementById('display-img').src = data.image_url;
+            } else {
+                alert("Error al subir imagen: " + data.error);
+            }
+        } catch (err) {
+            console.error(err);
+            alert("Error procesando imagen.");
+        } finally {
+            document.querySelector('button[onclick*="camera-input"]').innerHTML = originalBtnContent;
+        }
+    }
+
+    // The compression engine
+    function compressImage(file, maxWidth, quality) {
+        return new Promise((resolve, reject) => {
+            const reader = new FileReader();
+            reader.readAsDataURL(file);
+            reader.onload = event => {
+                const img = new Image();
+                img.src = event.target.result;
+                img.onload = () => {
+                    const canvas = document.createElement('canvas');
+                    let width = img.width;
+                    let height = img.height;
+
+                    if (width > maxWidth) {
+                        height = Math.round((height * maxWidth) / width);
+                        width = maxWidth;
+                    }
+
+                    canvas.width = width;
+                    canvas.height = height;
+
+                    const ctx = canvas.getContext('2d');
+                    ctx.drawImage(img, 0, 0, width, height);
+
+                    canvas.toBlob(blob => {
+                        resolve(blob);
+                    }, 'image/jpeg', quality);
+                };
+                img.onerror = err => reject(err);
+            };
+            reader.onerror = err => reject(err);
+        });
+    }
+
+    function applyBulkPrice() {
+        const price = document.getElementById('bulk-price-input').value;
+        const checked = document.querySelectorAll('.product-checkbox:checked');
+
+        if (!price || checked.length === 0) return;
+
+        // Set text in the pretty modal
+        document.getElementById('bulk-count-text').innerText = checked.length;
+        document.getElementById('bulk-price-text').innerText = clp.format(price);
+
+        // Show the modal
+        const bulkModal = new bootstrap.Modal(document.getElementById('bulkConfirmModal'));
+        bulkModal.show();
+    }
+
+    async function executeBulkPrice() {
+        const price = document.getElementById('bulk-price-input').value;
+        const checked = document.querySelectorAll('.product-checkbox:checked');
+        const barcodes = Array.from(checked).map(cb => cb.closest('tr').getAttribute('data-barcode'));
+
+        const res = await fetch('/bulk_price_update', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ barcodes, new_price: price })
+        });
+
+        if (res.ok) {
+            checked.forEach(cb => {
+                const cell = cb.closest('tr').querySelector('.price-cell');
+                cell.setAttribute('data-value', price);
+                cell.innerText = clp.format(price);
+                cb.checked = false;
+            });
+            document.getElementById('bulk-price-input').value = '';
+            updateBulkBar();
+
+            // Hide modal
+            const modalEl = document.getElementById('bulkConfirmModal');
+            bootstrap.Modal.getInstance(modalEl).hide();
+        }
+    }
+
+    function applyBulkDelete() {
+        const checked = document.querySelectorAll('.product-checkbox:checked');
+        if (checked.length === 0) return;
+
+        document.getElementById('bulk-delete-count').innerText = checked.length;
+        const delModal = new bootstrap.Modal(document.getElementById('bulkDeleteModal'));
+        delModal.show();
+    }
+
+    async function executeBulkDelete() {
+        const checked = document.querySelectorAll('.product-checkbox:checked');
+        const barcodes = Array.from(checked).map(cb => cb.closest('tr').getAttribute('data-barcode'));
+
+        const res = await fetch('/bulk_delete', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ barcodes })
+        });
+
+        if (res.ok) {
+            checked.forEach(cb => {
+                cb.closest('tr').remove(); // Remove the row from the table immediately
+            });
+            updateBulkBar();
+
+            const modalEl = document.getElementById('bulkDeleteModal');
+            bootstrap.Modal.getInstance(modalEl).hide();
+        } else {
+            alert("Error al eliminar productos.");
+        }
+    }
+
+    /* ── Search ── */
+    function searchTable() {
+        const input = document.getElementById('searchInput');
+        const q = input.value.toUpperCase();
+        const clearBtn = document.getElementById('clearSearchBtn');
+
+        // Show/hide clear button based on input
+        clearBtn.style.display = q.length > 0 ? 'block' : 'none';
+
+        document.querySelectorAll('#inventoryTable tbody tr').forEach(tr => {
+            tr.style.display = tr.innerText.toUpperCase().includes(q) ? '' : 'none';
+        });
+
+        document.getElementById('select-all').checked = false;
+    }
+
+    function clearSearch() {
+        const input = document.getElementById('searchInput');
+        input.value = '';
+        searchTable();
+        input.focus();
+    }
+
+   let sortDirections = [true, true, true, true, true]; 
+
+    function sortTable(colIdx) {
+        const table = document.getElementById("inventoryTable");
+        const tbody = table.querySelector("tbody");
+        const ths = table.querySelectorAll("thead th");
+        const rows = Array.from(tbody.querySelectorAll("tr"));
+        const isAscending = sortDirections[colIdx];
+
+        const sortedRows = rows.sort((a, b) => {
+            let valA = a.cells[colIdx].innerText.trim();
+            let valB = b.cells[colIdx].innerText.trim();
+
+            // Specific logic for numeric columns
+            if (colIdx === 3 || colIdx === 4) {
+                // If it's Stock (3) or Price (4), strip everything but numbers
+                // This handles the "Uni" text and the currency symbols
+                valA = parseFloat(valA.replace(/[^\d.-]/g, '')) || 0;
+                valB = parseFloat(valB.replace(/[^\d.-]/g, '')) || 0;
+            } else {
+                valA = valA.toLowerCase();
+                valB = valB.toLowerCase();
+            }
+
+            if (valA < valB) return isAscending ? -1 : 1;
+            if (valA > valB) return isAscending ? 1 : -1;
+            return 0;
+        });
+
+        ths.forEach(th => th.classList.remove('sort-asc', 'sort-desc'));
+        
+        ths[colIdx].classList.add(isAscending ? 'sort-asc' : 'sort-desc');
+
+        sortDirections[colIdx] = !isAscending;
+        sortedRows.forEach(row => tbody.appendChild(row));
+        document.getElementById('select-all').checked = false;
+    }
+
+    let html5QrCode;
+    let currentCameraId;
+
+    async function startScanner() {
+        const modal = new bootstrap.Modal(document.getElementById('scannerModal'));
+        modal.show();
+
+        if (!html5QrCode) {
+            html5QrCode = new Html5Qrcode("reader");
+        }
+
+        try {
+            const devices = await Html5Qrcode.getCameras();
+            const select = document.getElementById('camera-select');
+            select.innerHTML = '';
+
+            if (devices && devices.length) {
+                devices.forEach((device, index) => {
+                    const option = document.createElement('option');
+                    option.value = device.id;
+                    option.dataset.index = index;
+                    option.text = device.label || `Cámara ${index + 1}`;
+                    select.appendChild(option);
+                });
+
+                const savedIndex = getCookie('cameraIndex');
+                const targetIndex = (savedIndex !== null && savedIndex < devices.length) ? savedIndex : devices.length - 1;
+
+                currentCameraId = devices[targetIndex].id;
+                select.value = currentCameraId;
+
+                launchCamera(currentCameraId);
+            } else {
+                alert("No se encontraron cámaras.");
+            }
+        } catch (err) {
+            console.error("Error obteniendo cámaras:", err);
+            alert("Error de permisos de cámara. Revisa la conexión HTTPS.");
+        }
+    }
+
+    let torchEnabled = false;
+
+    function isTorchSupported() {
+        if (!html5QrCode || !html5QrCode.isScanning) return false;
+        const settings = html5QrCode.getRunningTrackSettings();
+        return "torch" in settings;
+    }
+
+    async function toggleTorch() {
+        if (!isTorchSupported()) return;
+
+        torchEnabled = !torchEnabled;
+        try {
+            await html5QrCode.applyVideoConstraints({
+                advanced: [{ torch: torchEnabled }]
+            });
+
+            const btn = document.getElementById('torch-btn');
+            if (torchEnabled) {
+                btn.classList.replace('btn-outline-secondary', 'btn-accent');
+                btn.innerHTML = '<i class="bi bi-lightbulb-fill"></i>';
+            } else {
+                btn.classList.replace('btn-accent', 'btn-outline-secondary');
+                btn.innerHTML = '<i class="bi bi-lightbulb"></i>';
+            }
+        } catch (err) {
+            console.error("Torch error:", err);
+        }
+    }
+
+    async function launchCamera(cameraId) {
+        const config = { fps: 10, qrbox: { width: 250, height: 150 } };
+
+        if (html5QrCode.isScanning) {
+            await html5QrCode.stop();
+        }
+
+        try {
+            await html5QrCode.start(
+                cameraId,
+                config,
+                (decodedText) => {
+                    stopScanner();
+                    bootstrap.Modal.getInstance(document.getElementById('scannerModal')).hide();
+                    fetch(`/scan?content=${decodedText}`)
+                        .then(res => {
+                            if (res.status === 404) console.log("Nuevo producto detectado");
+                        });
+                }
+            );
+
+            setTimeout(() => {
+                html5QrCode.applyVideoConstraints({
+                    focusMode: "continuous",
+                    advanced: [{ zoom: 2.0 }],
+                });
+                const torchBtn = document.getElementById('torch-btn');
+                if (isTorchSupported()) {
+                    torchBtn.style.setProperty('display', 'block', 'important'); // Use !important to override inline styles
+                    torchEnabled = false;
+                    torchBtn.classList.replace('btn-accent', 'btn-outline-secondary');
+                    torchBtn.innerHTML = '<i class="bi bi-lightbulb"></i>';
+                } else {
+                    torchBtn.style.display = 'none';
+                    console.log("Torch not supported on this device/browser.");
+                }
+            }, 250);
+
+        } catch (err) {
+            console.error("Camera start error:", err);
+        }
+    }
+
+    function stopScanner() {
+        if (html5QrCode && html5QrCode.isScanning) {
+            document.getElementById('torch-btn').style.display = 'none';
+            html5QrCode.stop().then(() => {
+                html5QrCode.clear();
+            }).catch(err => console.error("Stop error", err));
+        }
+    }
+
+    function switchCamera(cameraId) {
+        if (cameraId) {
+            const select = document.getElementById('camera-select');
+            const selectedOption = select.options[select.selectedIndex];
+
+            if (selectedOption && selectedOption.dataset.index !== undefined) {
+                setCookie('cameraIndex', selectedOption.dataset.index, 365);
+            }
+
+            currentCameraId = cameraId;
+            launchCamera(cameraId);
+        }
+    }
+
+    function toggleStockInput() {
+        const unitSelect = document.getElementById('form-unit-type');
+        const stockInput = document.getElementById('form-stock');
+
+        if (unitSelect.value === 'kg') {
+            stockInput.classList.add('d-none');
+            stockInput.disabled = true;
+            stockInput.value = '';
+        } else {
+            stockInput.classList.remove('d-none');
+            stockInput.disabled = false;
+        }
+    }
+
+    document.getElementById('form-unit-type').addEventListener('change', toggleStockInput);
+</script>
+{% endblock %}

templates/login.html

@@ -1,25 +1,38 @@
 <!DOCTYPE html>
-<html>
+<html lang="es" data-theme="light">
+
 <head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>SekiPOS Login</title>
-    <style>
-        body { font-family: sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; background: #2c3e50; }
-        .login-box { background: white; padding: 40px; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.3); text-align: center; }
-        input { display: block; width: 250px; margin: 10px auto; padding: 12px; border: 1px solid #ccc; border-radius: 6px; }
-        button { background: #3498db; color: white; border: none; padding: 12px 24px; border-radius: 6px; cursor: pointer; font-size: 1.1em; }
-    </style>
+    <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.png') }}" type="image/x-icon">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
 </head>
+
 <body>
-    <div class="login-box">
-        <h2>SekiPOS Access</h2>
+    <div class="login-box text-center">
+        <h2 class="fw-bold mb-1">SekiPOS</h2>
+        <p class="mb-4" style="opacity:.7;">¡Hola de nuevo!</p>
+
         {% with messages = get_flashed_messages() %}
-          {% if messages %}<p style="color: red;">{{ messages[0] }}</p>{% endif %}
+        {% if messages %}
+        <div class="error-alert p-2 mb-3">{{ messages[0] }}</div>
+        {% endif %}
         {% endwith %}
+
         <form method="POST">
-            <input type="text" name="username" placeholder="Username" required>
-            <input type="password" name="password" placeholder="Password" required>
-            <button type="submit">Unlock</button>
+            <input class="form-control mb-3" type="text" name="username" placeholder="Usuario" required autofocus>
+            <input class="form-control mb-3" type="password" name="password" placeholder="Contraseña" required>
+            <button type="submit" class="btn btn-login w-100">
+                Iniciar Sesión
+            </button>
         </form>
     </div>
+    <script src="{{ url_for('static', filename='cookieStuff.js') }}"></script>
+    <script src="{{ url_for('static', filename='themeStuff.js') }}"></script>
+
 </body>
+
 </html>

templates/macros/base.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="es" data-theme="light">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>SekiPOS - {% block title %}{% endblock %}</title>
+    
+    <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.png') }}" type="image/x-icon">
+    
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet">
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
+    
+    <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
+    
+    {% block head %}{% endblock %}
+</head>
+<body>
+    {% include 'macros/navbar.html' %}
+
+    <main class="container-fluid px-3">
+        {% block content %}{% endblock %}
+    </main>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="{{ url_for('static', filename='cookieStuff.js') }}"></script>
+    <script src="{{ url_for('static', filename='themeStuff.js') }}"></script>
+    
+    {% block scripts %}{% endblock %}
+</body>
+</html>

templates/macros/modals.html

@@ -0,0 +1,128 @@
+{% macro confirm_modal(id, title, button_class, button_text, onclick_fn) %}
+<div class="modal fade" id="{{ id }}" tabindex="-1" aria-hidden="true">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title">{{ title }}</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body">
+                {{ caller() }}
+                <div class="d-grid gap-2 mt-3">
+                    <button class="btn {{ button_class }}" onclick="{{ onclick_fn }}">
+                        {{ button_text }}
+                    </button>
+                    <button class="btn btn-secondary" data-bs-dismiss="modal">Cancelar</button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endmacro %}
+
+{% macro scanner_modal() %}
+<div class="modal fade" id="scannerModal" tabindex="-1" data-bs-backdrop="static">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title">Escanear Código</h5>
+                <button type="button" class="btn-close" onclick="stopScanner()" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body">
+                <div class="mb-3 d-flex align-items-end gap-2">
+                    <div class="flex-grow-1">
+                        <label class="form-label small text-muted">Seleccionar Cámara:</label>
+                        <select id="camera-select" class="form-select form-select-sm" onchange="switchCamera(this.value)">
+                            <option value="">Cargando cámaras...</option>
+                        </select>
+                    </div>
+                    <button id="torch-btn" class="btn btn-outline-secondary btn-sm" onclick="toggleTorch()" style="height: 31px; min-width: 40px; display: none;"></button>
+                </div>
+                <div id="reader" style="width: 100%; border-radius: 8px; overflow: hidden;"></div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endmacro %}
+
+{% macro render_receipt(id_suffix="") %}
+<div id="receipt-print-zone{{ id_suffix }}" class="d-none d-print-block">
+    <style>
+        @media print {
+            /* Tell the browser this is a continuous 80mm thermal roll */
+            @page {
+                margin: 0;
+                size: 80mm auto; 
+            }
+
+            /* Nuke the rest of the layout from the document flow so it takes up 0 height */
+            nav, .discord-card, .modal, .row {
+                display: none !important;
+            }
+            
+            body * { 
+                visibility: hidden; 
+            }
+
+            /* Resurrect the receipt and put it in the top left corner */
+            #receipt-print-zone{{ id_suffix }}, #receipt-print-zone{{ id_suffix }} * { 
+                visibility: visible; 
+            }
+            #receipt-print-zone{{ id_suffix }} {
+                position: absolute; 
+                left: 0; 
+                top: 0; 
+                width: 80mm;
+                padding: 2mm 5mm; 
+                margin: 0; 
+                display: block !important;
+                font-family: 'Courier New', Courier, monospace; 
+                font-size: 10px; 
+                color: #000;
+            }
+        }
+        
+        .receipt-table { width: 100%; border-collapse: collapse; font-family: monospace; font-size: 12px; }
+        .receipt-header { text-align: center; margin-bottom: 10px; border-bottom: 1px dashed #000; padding-bottom: 5px; }
+        .receipt-total-row { border-top: 1px dashed #000; margin-top: 5px; padding-top: 5px; font-weight: bold; }
+    </style>
+
+    <div class="receipt-header">
+        <h3 style="margin: 0; font-weight: 800;">SekiPOS</h3>
+        <div style="font-size: 10px; margin-bottom: 5px;" id="receipt-type{{ id_suffix }}">Comprobante de Venta</div>
+        <div style="font-size: 11px; font-weight: bold;">
+            Ticket Nº <span id="receipt-ticket-id{{ id_suffix }}"></span>
+        </div>
+        <div id="receipt-date{{ id_suffix }}" style="font-size: 11px;"></div>
+    </div>
+
+    <table class="receipt-table">
+        <thead>
+            <tr>
+                <th style="width: 15%; text-align: left;">Cant</th>
+                <th style="width: 60%; padding-left: 5px; text-align: left;">Desc</th>
+                <th style="width: 25%; text-align: right;">Total</th>
+            </tr>
+        </thead>
+        <tbody id="receipt-items-print{{ id_suffix }}"></tbody>
+    </table>
+
+    <div class="receipt-total-row d-flex justify-content-between">
+        <span>TOTAL:</span>
+        <span id="receipt-total-print{{ id_suffix }}"></span>
+    </div>
+
+    <div id="receipt-payment-info{{ id_suffix }}">
+        <div class="d-flex justify-content-between">
+            <span>RECIBIDO:</span>
+            <span id="receipt-paid-print{{ id_suffix }}"></span>
+        </div>
+        <div class="d-flex justify-content-between">
+            <span>VUELTO:</span>
+            <span id="receipt-change-print{{ id_suffix }}"></span>
+        </div>
+    </div>
+
+    <div style="text-align: center; margin-top: 20px; font-size: 10px;">¡Gracias por su compra!</div>
+</div>
+{% endmacro %}

templates/macros/navbar.html

@@ -0,0 +1,54 @@
+<nav class="navbar navbar-expand-md sticky-top px-3 mb-3">
+    <span class="navbar-brand">
+        SekiPOS
+        <small class="text-muted fw-normal" style="font-size:0.65rem;">v2.1</small>
+    </span>
+
+    <div class="ms-3 gap-2 d-flex">
+        <a href="/inventory" class="btn btn-sm {{ 'btn-primary' if active_page == 'inventory' else 'btn-outline-primary' }}">
+            <i class="bi bi-box-seam me-1"></i>Inventario
+        </a>
+        <a href="/checkout"
+            class="btn btn-sm {{ 'btn-primary' if active_page == 'checkout' else 'btn-outline-primary' }}">
+            <i class="bi bi-cart-fill me-1"></i>Caja
+        </a>
+        <a href="/sales" class="btn btn-sm {{ 'btn-primary' if active_page == 'sales' else 'btn-outline-primary' }}">
+            <i class="bi bi-receipt me-1"></i>Ventas
+        </a>
+        <a href="/dicom" class="btn btn-sm {{ 'btn-danger' if active_page == 'dicom' else 'btn-outline-danger' }}">
+            <i class="bi bi-journal-x me-1"></i>Dicom
+        </a>
+    </div>
+
+    <div class="ms-auto">
+        <div class="dropdown">
+            <button class="btn btn-accent dropdown-toggle" type="button" data-bs-toggle="dropdown">
+                <i class="bi bi-person-circle me-1"></i>
+                <span class="d-none d-sm-inline">{{ user.username }}</span>
+            </button>
+            <ul class="dropdown-menu dropdown-menu-end shadow">
+                <li>
+                    <button class="dropdown-item" onclick="toggleTheme()">
+                        <i class="bi bi-moon-stars me-2"></i>Modo Oscuro
+                    </button>
+                </li>
+                <li>
+                    <a class="dropdown-item" href="/export/db">
+                        <i class="bi bi-database-down me-2"></i>Descargar DB
+                    </a>
+                </li>
+                <li>
+                    <a class="dropdown-item" href="/export/images">
+                        <i class="bi bi-images me-2"></i>Descargar Imágenes
+                    </a>
+                </li>
+                <li><hr class="dropdown-divider"></li>
+                <li>
+                    <a class="dropdown-item text-danger" href="/logout">
+                        <i class="bi bi-box-arrow-right me-2"></i>Salir
+                    </a>
+                </li>
+            </ul>
+        </div>
+    </div>
+</nav>

templates/sales.html

@@ -0,0 +1,279 @@
+{% extends "macros/base.html" %}
+{% from 'macros/modals.html' import confirm_modal, scanner_modal, render_receipt %}
+
+{% block title %}Ventas{% endblock %}
+
+{% block head %}
+<!--HEAD-->
+{% endblock %}
+
+{% block content %}
+{{ render_receipt() }}
+
+<div class="row g-3 mb-3">
+    <div class="col-12 col-md-4">
+        <div class="discord-card p-3 shadow-sm text-center">
+            <h6 class="text-muted text-uppercase mb-1" style="font-size: 0.75rem; font-weight: 700;">
+                {% if selected_date %}Día Seleccionado{% else %}Ventas de Hoy{% endif %}
+            </h6>
+            <h2 class="price-cell mb-0" style="color: var(--accent); font-weight: 800;" data-value="{{ stats.daily }}">
+            </h2>
+        </div>
+    </div>
+    <div class="col-12 col-md-4">
+        <div class="discord-card p-3 shadow-sm text-center">
+            <h6 class="text-muted text-uppercase mb-1" style="font-size: 0.75rem; font-weight: 700;">Últimos 7
+                Días</h6>
+            <h2 class="price-cell mb-0" style="color: var(--accent); font-weight: 800;" data-value="{{ stats.week }}">
+            </h2>
+        </div>
+    </div>
+    <div class="col-12 col-md-4">
+        <div class="discord-card p-3 shadow-sm text-center">
+            <h6 class="text-muted text-uppercase mb-1" style="font-size: 0.75rem; font-weight: 700;">Este Mes
+            </h6>
+            <h2 class="price-cell mb-0" style="color: var(--accent); font-weight: 800;" data-value="{{ stats.month }}">
+            </h2>
+        </div>
+    </div>
+</div>
+
+<div class="discord-card p-3 shadow-sm">
+    <div class="d-flex justify-content-between align-items-center mb-3">
+        <h4 class="mb-0"><i class="bi bi-receipt-cutoff me-2"></i>Historial</h4>
+        <div class="d-flex align-items-center gap-2">
+            <label for="date-filter" class="form-label mb-0 text-muted small d-none d-sm-block">Filtrar
+                Día:</label>
+            <input type="date" id="date-filter" class="form-control form-control-sm"
+                style="background: var(--input-bg); color: var(--text-main); border-color: var(--border);"
+                value="{{ selected_date or '' }}" onchange="filterByDate(this.value)">
+            {% if selected_date %}
+            <a href="/sales" class="btn btn-sm btn-outline-secondary" title="Limpiar filtro"><i
+                    class="bi bi-x-lg"></i></a>
+            {% endif %}
+        </div>
+    </div>
+    <div class="table-responsive">
+        <table class="table table-hover">
+            <thead>
+                <tr>
+                    <th>Nº Ticket</th>
+                    <th>Fecha y Hora</th>
+                    <th>Método</th>
+                    <th>Total</th>
+                    <th class="text-nowrap" style="width: 1%;">Acciones</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for s in sales %}
+                <tr>
+                    <td class="font-monospace text-muted">#{{ s[0] }}</td>
+                    <td class="utc-date">{{ s[1] }}</td>
+                    <td class="text-capitalize">{{ s[3] }}</td>
+                    <td class="price-cell fw-bold" data-value="{{ s[2] }}"></td>
+                    <td class="text-nowrap">
+                        <button class="btn btn-sm btn-outline-secondary py-0 px-2"
+                                onclick="viewSale({{ s[0] }}, '{{ s[1] }}', {{ s[2] }})">
+                            <i class="bi bi-eye"></i> <span class="d-none d-lg-inline">Ver Detalle</span>
+                        </button>
+                    </td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+</div>
+</div>
+
+<div class="modal fade" id="receiptModal" tabindex="-1">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title">Detalle de Venta <span id="modal-ticket-id" class="text-muted small"></span>
+                </h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body">
+                <p class="text-muted small mb-2" id="modal-date"></p>
+                <table class="table table-sm">
+                    <thead>
+                        <tr>
+                            <th>Producto</th>
+                            <th>Cant</th>
+                            <th class="text-end">Subtotal</th>
+                        </tr>
+                    </thead>
+                    <tbody id="receipt-items">
+                    </tbody>
+                    <tfoot>
+                        <tr>
+                            <th colspan="2" class="text-end">TOTAL:</th>
+                            <th class="text-end fs-5" id="modal-total" style="color: var(--accent);"></th>
+                        </tr>
+                    </tfoot>
+                </table>
+            </div>
+            <div class="modal-body">
+            </div>
+            <div class="modal-footer d-flex justify-content-between border-0 pt-0">
+                <div class="d-flex gap-2">
+                    <button class="btn btn-outline-danger btn-sm" id="btn-reverse-sale">
+                        <i class="bi bi-arrow-counterclockwise me-1"></i>Anular Venta
+                    </button>
+                    <button class="btn btn-primary btn-sm" id="btn-print-modal">
+                        <i class="bi bi-printer me-1"></i>Re-imprimir
+                    </button>
+                </div>
+                
+                <button type="button" class="btn btn-secondary btn-sm" data-bs-dismiss="modal">Cerrar</button>
+            </div>
+        </div>
+    </div>
+</div>
+
+<div class="modal fade" id="reverseConfirmModal" tabindex="-1">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content border-danger">
+            <div class="modal-header pb-0 border-0">
+                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body text-center pt-0 pb-4">
+                <i class="bi bi-exclamation-triangle-fill text-danger mb-3" style="font-size: 3rem;"></i>
+                <h4 class="mb-3">¿Anular Venta #<span id="reverse-modal-id"></span>?</h4>
+                <p class="text-muted small px-3">Los productos regresarán automáticamente al inventario y el ticket
+                    será eliminado permanentemente.</p>
+
+                <div class="d-flex gap-2 justify-content-center mt-4 px-3">
+                    <button class="btn btn-secondary w-50" data-bs-dismiss="modal">Cancelar</button>
+                    <button class="btn btn-danger w-50" onclick="executeReverseSale()">Sí, Anular</button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}
+{% block scripts %}
+<script>
+    const clp = new Intl.NumberFormat('es-CL', { style: 'currency', currency: 'CLP', minimumFractionDigits: 0 });
+    let saleToReverse = null;
+
+    // Format raw UTC dates from DB into friendly local time
+    document.querySelectorAll('.utc-date').forEach(el => {
+        const date = new Date(el.innerText + " UTC");
+        if (!isNaN(date)) {
+            el.innerText = date.toLocaleString('es-CL', {
+                year: 'numeric', month: '2-digit', day: '2-digit',
+                hour: '2-digit', minute: '2-digit'
+            });
+        }
+    });
+
+    // Format all prices
+    document.querySelectorAll('.price-cell').forEach(td => {
+        td.innerText = clp.format(td.getAttribute('data-value'));
+    });
+
+    async function viewSale(id, rawDate, total) {
+        document.getElementById('modal-ticket-id').innerText = `#${id}`;
+        document.getElementById('modal-total').innerText = clp.format(total);
+
+        const localDate = new Date(rawDate + " UTC").toLocaleString('es-CL');
+        document.getElementById('modal-date').innerText = localDate !== "Invalid Date" ? localDate : rawDate;
+
+        // Configure the Anular button
+        document.getElementById('btn-reverse-sale').setAttribute('onclick', `reverseSale(${id})`);
+        
+        // Configure the Print button
+        document.getElementById('btn-print-modal').setAttribute('onclick', `reprintSale(${id}, ${total}, '${rawDate}')`);
+
+        const tbody = document.getElementById('receipt-items');
+        tbody.innerHTML = '<tr><td colspan="3" class="text-center text-muted">Cargando...</td></tr>';
+
+        const modal = new bootstrap.Modal(document.getElementById('receiptModal'));
+        modal.show();
+
+        try {
+            const res = await fetch(`/api/sale/${id}`);
+            const items = await res.json();
+
+            tbody.innerHTML = items.map(item => `
+                <tr>
+                    <td>
+                        ${item.name}<br>
+                        <small class="text-muted font-monospace" style="font-size: 0.7rem;">${item.barcode}</small>
+                    </td>
+                    <td>${item.qty}</td>
+                    <td class="text-end">${clp.format(item.subtotal)}</td>
+                </tr>
+            `).join('');
+        } catch (err) {
+            tbody.innerHTML = '<tr><td colspan="3" class="text-center text-danger">Error cargando productos</td></tr>';
+        }
+    }
+
+    async function reprintSale(id, total, rawDate) {
+        const tbody = document.getElementById('receipt-items-print');
+        
+        try {
+            const res = await fetch(`/api/sale/${id}`);
+            const items = await res.json();
+
+            tbody.innerHTML = items.map(item => `
+                <tr>
+                    <td>${item.qty}</td>
+                    <td style="padding-left: 5px;">${item.name}</td>
+                    <td style="text-align: right;">${clp.format(item.subtotal)}</td>
+                </tr>
+            `).join('');
+
+            document.getElementById('receipt-ticket-id').innerText = id;
+            document.getElementById('receipt-total-print').innerText = clp.format(total);
+            document.getElementById('receipt-date').innerText = new Date(rawDate + " UTC").toLocaleString('es-CL');
+            document.getElementById('receipt-payment-info').style.display = 'none';
+
+            window.print();
+        } catch (err) {
+            console.error(err);
+            alert("Error al preparar la impresión.");
+        }
+    }
+
+    function filterByDate(dateVal) {
+        if (dateVal) {
+            window.location.href = `/sales?date=${dateVal}`;
+        } else {
+            window.location.href = `/sales`;
+        }
+    }
+
+    function reverseSale(id) {
+        saleToReverse = id;
+        document.getElementById('reverse-modal-id').innerText = id;
+
+        // Hide the receipt modal so we don't have overlapping popups
+        bootstrap.Modal.getInstance(document.getElementById('receiptModal')).hide();
+
+        // Show the new confirmation modal
+        const confirmModal = bootstrap.Modal.getOrCreateInstance(document.getElementById('reverseConfirmModal'));
+        confirmModal.show();
+    }
+
+    async function executeReverseSale() {
+        if (!saleToReverse) return;
+
+        try {
+            const res = await fetch(`/api/sale/${saleToReverse}`, { method: 'DELETE' });
+
+            if (res.ok) {
+                window.location.reload(); // Refresh the dashboard
+            } else {
+                const data = await res.json();
+                alert("Error anulando la venta: " + (data.error || "Desconocido"));
+            }
+        } catch (err) {
+            console.error(err);
+            alert("Error de conexión con el servidor.");
+        }
+    }
+</script>
+{% endblock %}