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>

.gitea/workflows/ci-ts.yml

@@ -57,5 +57,9 @@ jobs:
         with:
           path: ~/.cache/ms-playwright
           key: playwright-${{ hashFiles('pnpm-lock.yaml') }}
-      - run: pnpm --filter @pipu/web exec playwright install --with-deps chromium
+      # git-core PPA на раннере иногда отвечает 503 и валит apt внутри --with-deps.
+      - run: |
+          sudo rm -f /etc/apt/sources.list.d/*git-core* || true
+          pnpm --filter @pipu/web exec playwright install --with-deps chromium ||
+            pnpm --filter @pipu/web exec playwright install chromium
       - run: pnpm --filter @pipu/web test:e2e