Migrate app from Tauri to Electron

Replace the Tauri/sidecar architecture with an Electron main process. Adds an electron/ directory (main, preload, handlers, core integrations for @xmcl/*), electron-builder.yml, TypeScript electron config and declarations, and updated IPC utilities (ipc.ts) so frontend uses ipcRenderer/ipcMain. Removes Tauri sidecar and src-tauri artifacts, deletes sidecar sources and keys, updates .gitignore, VSCode recommendations, package scripts and icons, and updates documentation (README, AGENTS, DEV) and frontend stores/apis to reflect the Electron-based architecture and config/auth persistence changes.

src/stores/updateStore.ts

@@ -4,14 +4,13 @@ import {
   downloadAndInstall,
   type DownloadProgress,
 } from "../api/update";
-import type { Update } from "@tauri-apps/plugin-updater";
 
 interface UpdateState {
   checking: boolean;
   downloading: boolean;
   installed: boolean;
   progress: DownloadProgress | null;
-  update: Update | null;
+  update: { version: string; releaseNotes?: string } | null;
   error: string | null;
   check: () => Promise<void>;
   install: () => Promise<void>;
@@ -37,12 +36,9 @@ export const useUpdateStore = create<UpdateState>((set, get) => ({
   },
 
   install: async () => {
-    const { update } = get();
-    if (!update) return;
-
     set({ downloading: true, error: null, progress: null });
     try {
-      await downloadAndInstall(update, (progress) => {
+      await downloadAndInstall((progress) => {
         set({ progress });
       });
       set({ downloading: false, installed: true });