fix(ci): remove build-check job from CI workflow (#66)

* ci: remove build-check job from CI workflow

The cross-platform build verification is redundant in CI since the
build and release pipeline (build.yml) already performs full builds
on every release. This reduces CI runner time and costs.

* ci: restrict build-check to Linux PRs and pin R2 action to v1.4

- Build-check now only runs on pull requests (skipped on main merge)
  with only Linux/amd64 enabled; macOS and Windows are commented out
  since the Build & Publish workflow handles all platforms on release.
- Pin ryand56/r2-upload-action from floating v1 tag to v1.4 to fix
  the upload failure seen in the v1.1.0 release build.

.github/workflows/build.yml

@@ -176,7 +176,7 @@ jobs:
             artifacts/release/yellowjacket-windows-amd64.exe
 
       - name: Upload to R2
-        uses: ryand56/r2-upload-action@v1
+        uses: ryand56/r2-upload-action@v1.4
         with:
           r2-account-id: ${{ secrets.R2_ACCOUNT_ID }}
           r2-access-key-id: ${{ secrets.R2_ACCESS_KEY_ID }}

.github/workflows/ci.yml

@@ -141,8 +141,6 @@ jobs:
 
   # ──────────────────────────────────────────────
   # Frontend: type-check
-  # (full build is verified by the build-check job
-  #  via Wails which handles path resolution)
   # ──────────────────────────────────────────────
   frontend:
     name: Frontend Type Check
@@ -170,11 +168,13 @@ jobs:
         run: pnpm exec tsc --noEmit
 
   # ──────────────────────────────────────────────
-  # Build verification: ensure it compiles on all
-  # target platforms (no artifacts uploaded)
+  # Build verification: ensure it compiles
+  # (only runs on PRs; release builds are handled
+  #  by the Build & Publish workflow)
   # ──────────────────────────────────────────────
   build-check:
     name: Build Check (${{ matrix.platform }})
+    if: github.event_name == 'pull_request'
     needs: [go-checks, go-test, codegen-check, frontend]
     strategy:
       fail-fast: false
@@ -184,12 +184,12 @@ jobs:
             os: ubuntu-latest
             build-name: yellowjacket
             apt-deps: libasound2-dev
-          - platform: darwin/universal
-            os: macos-latest
-            build-name: yellowjacket
-          - platform: windows/amd64
-            os: windows-latest
-            build-name: yellowjacket.exe
+          # - platform: darwin/universal
+          #   os: macos-latest
+          #   build-name: yellowjacket
+          # - platform: windows/amd64
+          #   os: windows-latest
+          #   build-name: yellowjacket.exe
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6