fix(ci): T4-04 harden LHCI/Chromatic/smoke gate semantics

.github/workflows/web-ci.yml

@@ -36,10 +36,10 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: TypeScript typecheck (G1 闸门: 0 any)
+      - name: TypeScript typecheck (G1 gate - 0 any)
         run: pnpm typecheck
 
-      - name: ESLint (G1 闸门: 0 warning)
+      - name: ESLint (G1 gate - 0 warning)
         run: pnpm lint
 
       - name: Vitest (单元测试)
@@ -97,7 +97,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: ci
     timeout-minutes: 15
-    if: github.event_name == 'push' || github.event_name == 'pull_request'
+    if: (github.event_name == 'push' || github.event_name == 'pull_request') && secrets.CHROMATIC_TOKEN != ''
     steps:
       - uses: actions/checkout@v4
         with: