feat: integrate Electron for desktop app

- Add electron-vite + Electron Forge tooling
- Create Electron main process with embedded Express server
- Create preload script with native dialog IPC bridge
- Refactor server.ts to export createExpressApp() (dual web/electron)
- Adapt renderQueue.ts for packaged binaries + pre-built bundle
- Add ensureBrowser() for Chrome Headless Shell pre-download
- Add scripts/bundle-remotion.js for packaging
- Data persists in ~/Library/Application Support/Bradly/
- Web mode preserved via npm run dev:web

server.ts

@@ -6,7 +6,7 @@ import { createServer as createViteServer } from "vite";
 import multer from "multer";
 
 // ═══ Uploads directory ═══
-const UPLOADS_DIR = path.join(process.cwd(), "uploads");
+const UPLOADS_DIR = process.env.BRADLY_UPLOADS_DIR || path.join(process.cwd(), "uploads");
 if (!fs.existsSync(UPLOADS_DIR)) {
   fs.mkdirSync(UPLOADS_DIR, { recursive: true });
 }
@@ -40,6 +40,14 @@ const mediaUpload = multer({
 });
 
 async function startServer() {
+  const app = await createExpressApp();
+  const PORT = 3000;
+  app.listen(PORT, "0.0.0.0", () => {
+    console.log(`Server running on http://localhost:${PORT}`);
+  });
+}
+
+export async function createExpressApp() {
   const app = express();
   const PORT = 3000;
 
@@ -299,23 +307,26 @@ async function startServer() {
     });
   });
 
-  if (process.env.NODE_ENV !== "production") {
-    const vite = await createViteServer({
-      server: { middlewareMode: true },
-      appType: "spa",
-    });
-    app.use(vite.middlewares);
-  } else {
-    const distPath = path.join(process.cwd(), "dist");
-    app.use(express.static(distPath));
-    app.get("*", (req, res) => {
-      res.sendFile(path.join(distPath, "index.html"));
-    });
+  if (!process.env.BRADLY_ELECTRON) {
+    if (process.env.NODE_ENV !== "production") {
+      const vite = await createViteServer({
+        server: { middlewareMode: true },
+        appType: "spa",
+      });
+      app.use(vite.middlewares);
+    } else {
+      const distPath = path.join(process.cwd(), "dist");
+      app.use(express.static(distPath));
+      app.get("*", (req, res) => {
+        res.sendFile(path.join(distPath, "index.html"));
+      });
+    }
   }
 
-  app.listen(PORT, "0.0.0.0", () => {
-    console.log(`Server running on http://localhost:${PORT}`);
-  });
+  return app;
 }
 
-startServer();
+// Direct execution (web mode only)
+if (!process.env.BRADLY_ELECTRON) {
+  startServer();
+}