Enhance CI workflow for deployment artifact preparation

- Added a check to ensure the build directory exists before proceeding with deployment.
- Updated the artifact copying process to conditionally include the appropriate lock file.
- Improved logging by listing files in the deploy directory for better visibility during CI runs.

.gitea/workflows/ci.yml

@@ -63,8 +63,11 @@ jobs:
 
       - name: Prepare deploy artifact
         run: |
+          ls -la
+          test -d build || (echo "Missing build/ (SvelteKit output). Check Build step." && exit 1)
           mkdir -p deploy
-          cp -r build package.json bun.lockb deploy/
+          cp -r build package.json deploy/
+          (test -f bun.lock && cp bun.lock deploy/) || (test -f bun.lockb && cp bun.lockb deploy/) || true
           cd deploy && bun install --frozen-lockfile --production
 
       - name: Setup SSH known hosts