feat: implement auth token synchronization between Electron and web app

- Added IPC channels for getting and setting auth tokens in Electron.
- Implemented functions to sync tokens from localStorage to Electron and vice versa.
- Updated components to ensure tokens are retrieved from Electron when not available locally.
- Enhanced user authentication flow by integrating token management across windows.

surfsense_desktop/src/preload.ts

@@ -68,4 +68,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
   // Browse files via native dialog
   browseFiles: () => ipcRenderer.invoke(IPC_CHANNELS.BROWSE_FILES),
   readLocalFiles: (paths: string[]) => ipcRenderer.invoke(IPC_CHANNELS.READ_LOCAL_FILES, paths),
+
+  // Auth token sync across windows
+  getAuthTokens: () => ipcRenderer.invoke(IPC_CHANNELS.GET_AUTH_TOKENS),
+  setAuthTokens: (bearer: string, refresh: string) =>
+    ipcRenderer.invoke(IPC_CHANNELS.SET_AUTH_TOKENS, { bearer, refresh }),
 });