fix(downloads): support offline fallback drafts

- launch Firefox handoffs through authenticated reconnect
- preserve usable drafts when metadata lookup fails
- reject stale metadata results and retry failed rows only

vite.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from "vite";
+import { defineConfig } from "vitest/config";
 import react from "@vitejs/plugin-react";
 import tailwindcss from '@tailwindcss/vite';
 
@@ -8,6 +8,14 @@ const host = process.env.TAURI_DEV_HOST;
 // https://vite.dev/config/
 export default defineConfig(async () => ({
   plugins: [react(), tailwindcss()],
+  test: {
+    exclude: [
+      "Extensions/**",
+      "**/node_modules/**",
+      "**/dist/**",
+      "**/.{idea,git,cache,output,temp}/**"
+    ]
+  },
 
   // Vite options tailored for Tauri development and only applied in `tauri dev` or `tauri build`
   //