ci: stabilize os release validation gates

Author: NubsCarson

.github/workflows/quality.yml

@@ -63,17 +63,43 @@ jobs:
           skip-avatar-clone: "true"
           no-vision-deps: "true"
 
+      - name: Check homepage smoke scope
+        id: homepage-scope
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          if [ "${{ github.event_name }}" != "pull_request" ]; then
+            echo "run=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          git fetch --no-tags --depth=1 origin "${{ github.base_ref }}"
+          changed_files="$(git diff --name-only "origin/${{ github.base_ref }}...HEAD")"
+          if grep -Eq '^(packages/homepage/|packages/shared-brand/|packages/app-core/scripts/write-homepage-release-data\.mjs|\.github/workflows/(deploy-homepage|release-electrobun|release-orchestrator)\.yml)' <<< "${changed_files}"; then
+            echo "run=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "run=false" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Skip unrelated homepage smoke
+        if: steps.homepage-scope.outputs.run != 'true'
+        run: echo "Skipping homepage smoke; this PR does not touch homepage release surfaces."
+
       - name: Build homepage
+        if: steps.homepage-scope.outputs.run == 'true'
         working-directory: packages/homepage
         run: bun run build
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install homepage browser
+        if: steps.homepage-scope.outputs.run == 'true'
         working-directory: packages/homepage
         run: ../../node_modules/.bin/playwright install --with-deps chromium
 
       - name: Test homepage downloads
+        if: steps.homepage-scope.outputs.run == 'true'
         working-directory: packages/homepage
         run: bun run test:e2e
         env: