test(frontend): add provider admin acceptance coverage

Add a dedicated acceptance script for providers.html, cover it in the local real-host script regression suite, and document the current frontend review baseline, closure audit, providers action matrix, and remediation task board.

This keeps the frontend acceptance boundary explicit: providers.html now has a repeatable verification entry point for its page-level actions, while non-UI provider operations remain documented as backend-only capabilities.

scripts/README.md

@@ -20,6 +20,7 @@
   - 例如：
     - `real_host_acceptance.sh`
     - `import_remote43_provider.sh`
+    - `verify_provider_admin_actions.sh`
     - `check_deepseek_completion_split.sh`
 - `scripts/test/`
   - 脚本自身的回归与资产检查
@@ -42,6 +43,7 @@ bash ./scripts/test/test_tksea_portal_assets.sh
 bash ./scripts/test/verify_quality_gates.sh
 scripts/deploy/build_local_image.sh
 bash ./scripts/acceptance/real_host_acceptance.sh
+bash ./scripts/acceptance/verify_provider_admin_actions.sh
 ```
 
 ## 统一质量门禁