change(ci/desktop): move desktop app build into check job

.github/workflows/js-tests.yml

@@ -24,25 +24,3 @@ jobs:
           # --ignore-scripts: TS & tests don't need native deps
           command: npm ci --ignore-scripts
       - run: npm run --prefix ${{ matrix.package }} check
-
-  # Production build of the desktop renderer. `typecheck` runs `tsc` only,
-  # which does NOT exercise Vite/Rolldown module resolution — so an
-  # unresolvable package export (e.g. a transitive @assistant-ui/tap that no
-  # longer exports "./react-shim") slips past typecheck and only explodes when
-  # users build apps/desktop from source on install/update. Run the real
-  # `vite build` here so that class of break fails in CI instead.
-  desktop-build:
-    name: Build desktop app
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
-        with:
-          node-version: 22
-          cache: npm
-      # Keep install scripts here: the production build may need node-pty's
-      # native binary. retry handles the transient install-time fetch flakes.
-      - uses: ./.github/actions/retry
-        with:
-          command: npm ci
-      - run: npm run --prefix apps/desktop build