v2.4.1: Replace raw wrapper script editor with structured config UI

Replace the raw textarea script editor with a structured form for Java
wrapper configuration. Users now manage two lists (JVM flags to strip,
args to inject with server/always condition) instead of editing bash/batch
scripts directly. Scripts are generated at launch time from the structured
config. Includes collapsible script preview for power users.

main.js

@@ -1539,3 +1539,45 @@ ipcMain.handle('profile-update', async (event, id, updates) => {
   }
 });
 
+// Java Wrapper Config IPC
+ipcMain.handle('load-wrapper-config', () => {
+  const { loadWrapperConfig } = require('./backend/launcher');
+  return loadWrapperConfig();
+});
+
+ipcMain.handle('save-wrapper-config', (event, config) => {
+  try {
+    const { saveWrapperConfig } = require('./backend/launcher');
+    saveWrapperConfig(config);
+    return { success: true };
+  } catch (error) {
+    console.error('Error saving wrapper config:', error);
+    return { success: false, error: error.message };
+  }
+});
+
+ipcMain.handle('reset-wrapper-config', () => {
+  try {
+    const { resetWrapperConfig } = require('./backend/launcher');
+    const config = resetWrapperConfig();
+    return { success: true, config };
+  } catch (error) {
+    console.error('Error resetting wrapper config:', error);
+    return { success: false, error: error.message };
+  }
+});
+
+ipcMain.handle('get-default-wrapper-config', () => {
+  const { getDefaultWrapperConfig } = require('./backend/launcher');
+  return getDefaultWrapperConfig();
+});
+
+ipcMain.handle('preview-wrapper-script', (event, config, platform) => {
+  const { generateWrapperScript } = require('./backend/launcher');
+  return generateWrapperScript(config || require('./backend/launcher').loadWrapperConfig(), platform || process.platform, '/path/to/java');
+});
+
+ipcMain.handle('get-current-platform', () => {
+  return process.platform;
+});
+