feat: add a platform-aware apps download page

Serve desktop and Android builds from the latest Gitea release on /download, and fix the desktop compile and CI flakes that blocked v1.3.0.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/test/fakeApi.ts

@@ -116,6 +116,28 @@ export function fakeApi(initial: FakeUser[]) {
           min_android_version_code: 0,
           bootstrap_required: [...users.values()].some((u) => u.must_change_credentials),
         });
+      case 'GET /api/v1/app/clients':
+        return json({
+          version: '1.3.0',
+          version_code: 1_030_099,
+          notes_md: '',
+          clients: [
+            { client: 'windows', filename: 'pipu-music_1.3.0_x64-setup.exe', size: 20_000_000, download_url: '/api/v1/app/download/windows/1.3.0' },
+            { client: 'linux', filename: 'pipu-music_1.3.0_amd64.AppImage', size: 18_000_000, download_url: '/api/v1/app/download/linux/1.3.0' },
+            { client: 'macos', filename: 'pipu-music_1.3.0_aarch64.dmg', size: 22_000_000, download_url: '/api/v1/app/download/macos/1.3.0' },
+            { client: 'android', filename: 'pipu-music-1.3.0.apk', size: 12_000_000, sha256: 'ab'.repeat(32), download_url: '/api/v1/app/download/android/1.3.0' },
+          ],
+        });
+      case 'GET /api/v1/app/android/latest':
+        return json({
+          version: '1.3.0',
+          version_code: 1_030_099,
+          notes_md: '',
+          size: 12_000_000,
+          sha256: 'ab'.repeat(32),
+          download_url: '/api/v1/app/android/download/1.3.0',
+          min_supported: 0,
+        });
       case 'POST /api/v1/auth/login': {
         const u = [...users.values()].find((x) => x.username === body?.username && x.password === body?.password);
         if (!u) return problem(401, 'auth.invalid_credentials');