refactor: unify into single muyue binary with embedded desktop mode

- Merge muyue + muyue-desktop into one binary (13MB)
- `muyue` starts TUI, `muyue desktop` launches web UI in browser
- Move frontend from cmd/muyue-desktop/frontend/ to web/ (standard Go layout)
- Add web/embed.go with //go:embed all:dist for frontend assets
- Add internal/desktop/ package (server, browser open, SPA routing, signals)
- Split internal/api/api.go into server.go + handlers.go
- Add internal/desktop/desktop.go with SPA fallback and --port/--no-open flags
- Clean package.json: remove unused @xterm/xterm, switch to ESM
- Fix vite.config.js proxy to use port 8095 for dev mode
- Add Makefile targets: frontend, desktop, dev-desktop
- Update all CI workflows: single binary build, web/ paths
- Remove cmd/muyue-desktop/ entirely

💘 Generated with Crush

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

.gitea/workflows/ci-develop.yml

@@ -35,8 +35,8 @@ jobs:
       - 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') }}
+          path: web/node_modules
+          key: ${{ runner.os }}-node-${{ hashFiles('web/package-lock.json') }}
           restore-keys: |
             ${{ runner.os }}-node-
 
@@ -45,7 +45,7 @@ jobs:
 
       - name: Build frontend
         run: |
-          cd cmd/muyue-desktop/frontend
+          cd web
           npm ci
           npm run build
 
@@ -68,7 +68,7 @@ jobs:
           echo "beta_num=${BETA_NUM}" >> $GITHUB_OUTPUT
           echo "Building beta release: ${VERSION}"
 
-      - name: Build CLI (all platforms)
+      - name: Build (all platforms)
         run: |
           mkdir -p dist
           VERSION=${{ steps.version.outputs.version }}
@@ -80,12 +80,6 @@ jobs:
           CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -ldflags="$LDFLAGS" -o dist/muyue-windows-amd64.exe ./cmd/muyue/
           CGO_ENABLED=0 GOOS=windows GOARCH=arm64 go build -ldflags="$LDFLAGS" -o dist/muyue-windows-arm64.exe ./cmd/muyue/
 
-      - name: Build Desktop (linux amd64)
-        run: |
-          VERSION=${{ steps.version.outputs.version }}
-          LDFLAGS="-s -w -X github.com/muyue/muyue/internal/version.Prerelease=${VERSION#v}"
-          CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="$LDFLAGS" -o dist/muyue-desktop-linux-amd64 ./cmd/muyue-desktop/
-
       - name: Package archives
         run: |
           cd dist
@@ -94,10 +88,9 @@ jobs:
           tar czf muyue-linux-arm64.tar.gz muyue-linux-arm64
           tar czf muyue-darwin-amd64.tar.gz muyue-darwin-amd64
           tar czf muyue-darwin-arm64.tar.gz muyue-darwin-arm64
-          tar czf muyue-desktop-linux-amd64.tar.gz muyue-desktop-linux-amd64
           zip muyue-windows-amd64.zip muyue-windows-amd64.exe
           zip muyue-windows-arm64.zip muyue-windows-arm64.exe
-          rm -f muyue-linux-amd64 muyue-linux-arm64 muyue-darwin-amd64 muyue-darwin-arm64 muyue-windows-amd64.exe muyue-windows-arm64.exe muyue-desktop-linux-amd64
+          rm -f muyue-linux-amd64 muyue-linux-arm64 muyue-darwin-amd64 muyue-darwin-arm64 muyue-windows-amd64.exe muyue-windows-arm64.exe
 
       - name: Generate changelog
         id: changelog