fix(ci): staging E2E/API tests shell由sh改为bash\n\nsh不支持set -eu中的pipefail及bash特性，导致staging job秒挂。\n两处修改：\n- Staging E2E Tests: Run Playwright E2E on staging\n- Staging API Integration Tests: Run API integration tests on staging

.gitea/workflows/ci-pipeline.yml

@@ -1094,7 +1094,7 @@ jobs:
       shell: sh
       run: bash scripts/ci/step_timer_start.sh
     - name: Run Playwright E2E on staging
-      shell: sh
+      shell: bash
       run: |
         set -eu
         # DooD模式下不能用-v挂载（宿主机路径与CI容器路径不一致）
@@ -1159,7 +1159,7 @@ jobs:
       shell: sh
       run: bash scripts/ci/step_timer_start.sh
     - name: Run API integration tests on staging
-      shell: sh
+      shell: bash
       run: |
         set -eu
         # DooD模式下不能用-v挂载（宿主机路径与CI容器路径不一致）