fix(ci): add frontend build step before Go vet/test/build

All three CI workflows now build the React frontend (npm ci && npm run
build) before any Go steps, so the go:embed directive in
cmd/muyue-desktop/main.go finds the dist/ directory.

- ci-develop.yml: already rewritten, included in this commit
- ci-main.yml: add Node 22 setup, cache, frontend build, desktop binary
  builds for all platforms, updated changelog download table
- ci-pr.yml: add Node 22 setup, cache, frontend build, desktop binary
  build check

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

.gitea/workflows/ci-pr.yml

@@ -15,6 +15,11 @@ jobs:
         with:
           go-version: '1.24.3'
 
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
       - name: Cache Go modules
         uses: actions/cache@v4
         with:
@@ -25,9 +30,23 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
 
+      - name: Cache Node modules
+        uses: actions/cache@v4
+        with:
+          path: cmd/muyue-desktop/frontend/node_modules
+          key: ${{ runner.os }}-node-${{ hashFiles('cmd/muyue-desktop/frontend/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
       - name: Download dependencies
         run: go mod download
 
+      - name: Build frontend
+        run: |
+          cd cmd/muyue-desktop/frontend
+          npm ci
+          npm run build
+
       - name: Vet
         run: go vet ./...
 
@@ -37,4 +56,5 @@ jobs:
       - name: Build
         run: |
           go build -o muyue ./cmd/muyue/
+          go build -o muyue-desktop ./cmd/muyue-desktop/
           ./muyue version