fix(ci): install unzip before Bun in E2E job

The Playwright Docker image lacks unzip, which Bun's install script requires.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -38,6 +38,7 @@ jobs:
 
       - name: Install Bun
         run: |
+          apt-get update && apt-get install -y unzip
           curl -fsSL https://bun.sh/install | bash
           echo "$HOME/.bun/bin" >> $GITHUB_PATH