ci: cache playwright browsers across runs; drop no-op save step

.gitea/workflows/ci.yml

@@ -84,14 +84,7 @@ jobs:
           done
           [ "$ok" = "1" ] || { echo "::error::dependency install failed after 3 attempts" >&2; exit 1; }
 
-      - name: Save deps cache
-        uses: actions/cache@v4
-        continue-on-error: true
-        with:
-          path: |
-            node_modules
-            $HOME/.bun/install/cache
-          key: ${{ runner.os }}-deps-bun-${{ hashFiles('bun.lock') }}
+      # No explicit save step: caches marked by the restore steps are uploaded automatically at job end.
 
       - name: Build
         run: npm run build
@@ -102,6 +95,15 @@ jobs:
       # Browsers run locally in CI (PW_REMOTE_BROWSER=0 below): the shared remote browser
       # server at 192.168.1.4 cannot reach a stack inside dind, and local chromium keeps
       # the job self-contained.
+      # Browser binaries (~187 MiB) cached across runs: the runner's uplink is flaky and
+      # cdn.playwright.dev downloads time out mid-transfer; once seeded, installs skip the download.
+      - name: Restore browser cache
+        uses: actions/cache@v4
+        continue-on-error: true
+        with:
+          path: $HOME/.cache/ms-playwright
+          key: ${{ runner.os }}-pw-browsers-${{ hashFiles('package.json') }}
+
       - name: Install browsers (local)
         run: npx playwright install --with-deps chromium