refactor: Antigravity/Codex 服务重构为插件化适配器架构

- 将 Antigravity 和 Codex 从独立模块迁移至 src/services/provider/adapters/ 插件体系
- 新增 provider_types 和 oauth_token 模块，移除 maintenance_scheduler 中的 OAuth 定时刷新
- 增强 admin API：扩展 keys 和 provider_query 端点，新增 dashboard 路由
- 大幅增强 ProviderDetailDrawer 组件，新增 AntigravityQuotaDialog
- 改进 handler 基类（chat/cli）和错误分类器
- 优化 fetch_scheduler 和 upstream_fetcher
- 前端 UI 组件清理和优化
- 更新测试以匹配新模块结构

src/services/task/impl/video_poller.py

@@ -585,6 +585,7 @@ class VideoTaskPollerAdapter:
             endpoint_sig,
             upstream_key,
             endpoint_headers=extra_headers,
+            header_rules=getattr(endpoint, "header_rules", None),
         )
         if auth_info:
             headers.pop("x-goog-api-key", None)

src/services/task/service.py

@@ -8,6 +8,7 @@ from sqlalchemy.orm import Session
 
 from src.config.settings import config
 from src.core.logger import logger
+from src.core.provider_types import ProviderType
 from src.models.database import ApiKey
 from src.services.candidate.failover import FailoverEngine
 from src.services.candidate.policy import RetryPolicy, SkipPolicy
@@ -598,7 +599,7 @@ class TaskService:
         if stage <= 0 and request_body_ref.get("_rectified", False):
             stage = 1
 
-        if stage >= 2 or (stage >= 1 and provider_type_norm != "antigravity"):
+        if stage >= 2 or (stage >= 1 and provider_type_norm != ProviderType.ANTIGRAVITY):
             logger.warning("  [{}] Thinking 错误：已整流仍失败，终止重试", request_id)
             self._mark_thinking_error_failed(
                 candidate_record_id,
@@ -631,7 +632,7 @@ class TaskService:
             request_body_ref["_rectified_this_turn"] = True
             request_body_ref["_rectify_stage"] = next_stage
 
-            if provider_type_norm == "antigravity":
+            if provider_type_norm == ProviderType.ANTIGRAVITY:
                 try:
                     from src.core.metrics import antigravity_degradation_total
 
@@ -1501,6 +1502,7 @@ class TaskService:
             provider_format,
             upstream_key,
             endpoint_headers=extra_headers,
+            header_rules=getattr(endpoint, "header_rules", None),
         )
 
         client = await HTTPClientPool.get_default_client_async()