fix(ci): 清理 .claude/worktrees 防止 submodule 錯誤

問題: Runner 上的 .claude/worktrees 被誤認為 submodule
解決: 在 checkout 前清理 worktrees 目錄

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/cd.yaml

@@ -103,7 +103,12 @@ jobs:
       api: ${{ inputs.force_deploy == true && 'true' || steps.filter.outputs.api }}
       web: ${{ inputs.force_deploy == true && 'true' || steps.filter.outputs.web }}
     steps:
+      - name: Clean worktrees
+        run: rm -rf .claude/worktrees 2>/dev/null || true
+
       - uses: actions/checkout@v4
+        with:
+          clean: true
 
       - uses: dorny/paths-filter@v3
         id: filter

.github/workflows/ci.yaml

@@ -44,7 +44,12 @@ jobs:
     needs: pre-flight
     timeout-minutes: 10
     steps:
+      - name: Clean worktrees
+        run: rm -rf .claude/worktrees 2>/dev/null || true
+
       - uses: actions/checkout@v4
+        with:
+          clean: true
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v3