feat(ci): skip build if no source changes (cache build output by hash)

.gitea/workflows/build_dashboard.yaml

@@ -23,22 +23,34 @@ jobs:
         with:
           node-version: '24'
 
+      - name: Hash source files
+        id: hash-src
+        run: echo "hash=$(find apps/dashboard-ui -type f \( -name '*.vue' -o -name '*.ts' -o -name '*.js' -o -name '*.css' -o -name '*.json' -o -name '*.html' \) | sort | xargs sha256sum | sha256sum | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"
+
+      - uses: actions/cache@v3
+        id: cache-build
+        with:
+          path: apps/dashboard-ui/dist
+          key: build-dashboard-${{ steps.hash-src.outputs.hash }}
+
       - name: Hash package-lock
         id: hash-npm
         run: echo "hash=$(sha256sum apps/dashboard-ui/package-lock.json | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"
 
       - uses: actions/cache@v3
+        id: cache-npm
         with:
-          path: |
-            ~/.npm
+          path: ~/.npm
           key: npm-dashboard-${{ steps.hash-npm.outputs.hash }}
           restore-keys: npm-dashboard-
 
       - name: Install
+        if: steps.cache-build.outputs.cache-hit != 'true'
         working-directory: apps/dashboard-ui
         run: npm ci || npm install
 
       - name: Build
+        if: steps.cache-build.outputs.cache-hit != 'true'
         working-directory: apps/dashboard-ui
         run: npm run build