Refactor and code designing

electron/preload.js

@@ -6,6 +6,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
   maximizeWindow: () => ipcRenderer.send('window-maximize'),
   closeWindow: () => ipcRenderer.send('window-close'),
 
+  // Open URL in system default browser
+  openExternal: (url) => ipcRenderer.invoke('open-external', url),
+
   // Desktop capturer for screen sharing
   getSources: () => ipcRenderer.invoke('get-sources'),
 
@@ -18,7 +21,6 @@ contextBridge.exposeInMainWorld('electronAPI', {
   fileExists: (filePath) => ipcRenderer.invoke('file-exists', filePath),
   ensureDir: (dirPath) => ipcRenderer.invoke('ensure-dir', dirPath),
 
-  // ── Database operations (all SQL lives in main process) ───────────
   db: {
     initialize: () => ipcRenderer.invoke('db:initialize'),