全面清理冗余与过度分层

后端优化：
- 合并 api/routes/stats.py 到 api/routes/proxies.py，统计接口变更为 /api/proxies/stats
- 内联 services/settings_service.py：settings.py 和 scheduler.py 直接使用 SettingsRepository
- 简化 repositories/proxy_repo.py：提取 _row_to_proxy 辅助函数，消除重复构造代码
- 更新 api/lifespan.py 和 api/deps.py，移除对 settings_service 的依赖
- 从 requirements.txt 移除 websockets 依赖（已废弃的 WebSocket 功能残留）

前端适配：
- 更新 frontend/src/api/index.js：stats 接口路径同步为 /api/proxies/stats
- 清理 api/index.js 中未使用的 createRequestConfig 和多余 JSDoc 注释

脚本优化：
- 移除 script/stop.bat 末尾的 pause，避免自动化调用时挂起

api/routes/__init__.py

@@ -1,8 +1,7 @@
 from fastapi import APIRouter
-from . import stats, proxies, plugins, scheduler, settings
+from . import proxies, plugins, scheduler, settings
 
 api_router = APIRouter()
-api_router.include_router(stats.router)
 api_router.include_router(proxies.router)
 api_router.include_router(plugins.router)
 api_router.include_router(scheduler.router)

api/routes/proxies.py

@@ -1,9 +1,11 @@
-"""代理相关路由"""
+"""代理相关路由（含统计信息）"""
 from typing import Optional
 from fastapi import APIRouter, Depends, Query
 from services.proxy_service import ProxyService
+from services.scheduler_service import SchedulerService
 from models.schemas import ProxyListRequest, BatchDeleteRequest
-from api.deps import get_proxy_service
+from api.deps import get_proxy_service, get_scheduler_service
+from core.log import logger
 
 router = APIRouter(prefix="/api/proxies", tags=["proxies"])
 
@@ -16,6 +18,20 @@ def error_response(message: str, code: int = 500):
     return {"code": code, "message": message, "data": None}
 
 
+@router.get("/stats")
+async def get_stats(
+    proxy_service: ProxyService = Depends(get_proxy_service),
+    scheduler_service: SchedulerService = Depends(get_scheduler_service),
+):
+    try:
+        stats = await proxy_service.get_stats()
+        stats["scheduler_running"] = scheduler_service.running
+        return success_response("获取统计信息成功", stats)
+    except Exception as e:
+        logger.error(f"Get stats failed: {e}")
+        return error_response("获取统计信息失败")
+
+
 @router.post("")
 async def list_proxies(
     request: ProxyListRequest,

api/routes/scheduler.py

@@ -1,11 +1,13 @@
 """调度器相关路由"""
 from fastapi import APIRouter, Depends
 from services.scheduler_service import SchedulerService
-from services.settings_service import SettingsService
+from repositories.settings_repo import SettingsRepository
+from core.db import get_db
 from api.deps import get_scheduler_service
 from core.log import logger
 
 router = APIRouter(prefix="/api/scheduler", tags=["scheduler"])
+settings_repo = SettingsRepository()
 
 
 def success_response(message: str, data=None):
@@ -25,11 +27,11 @@ async def start_scheduler(
             return success_response("验证调度器已在运行", {"running": True})
         await scheduler.start()
         # 持久化设置
-        settings_service = SettingsService()
-        settings = await settings_service.get_settings()
-        settings["auto_validate"] = True
-        from models.schemas import SettingsSchema
-        await settings_service.save_settings(SettingsSchema(**settings))
+        async with get_db() as db:
+            settings = await settings_repo.get_all(db)
+            settings["auto_validate"] = True
+            from models.schemas import SettingsSchema
+            await settings_repo.save(db, SettingsSchema(**settings).model_dump())
         return success_response("验证调度器已启动", {"running": True})
     except Exception as e:
         logger.error(f"Start scheduler failed: {e}")
@@ -45,11 +47,11 @@ async def stop_scheduler(
             return success_response("验证调度器未运行", {"running": False})
         await scheduler.stop()
         # 持久化设置
-        settings_service = SettingsService()
-        settings = await settings_service.get_settings()
-        settings["auto_validate"] = False
-        from models.schemas import SettingsSchema
-        await settings_service.save_settings(SettingsSchema(**settings))
+        async with get_db() as db:
+            settings = await settings_repo.get_all(db)
+            settings["auto_validate"] = False
+            from models.schemas import SettingsSchema
+            await settings_repo.save(db, SettingsSchema(**settings).model_dump())
         return success_response("验证调度器已停止", {"running": False})
     except Exception as e:
         logger.error(f"Stop scheduler failed: {e}")

api/routes/settings.py

@@ -1,11 +1,12 @@
 """设置相关路由"""
-from fastapi import APIRouter, Depends
-from services.settings_service import SettingsService
+from fastapi import APIRouter
+from core.db import get_db
+from repositories.settings_repo import SettingsRepository
 from models.schemas import SettingsSchema
-from api.deps import get_settings_service
 from core.log import logger
 
 router = APIRouter(prefix="/api/settings", tags=["settings"])
+settings_repo = SettingsRepository()
 
 
 def success_response(message: str, data=None):
@@ -17,9 +18,10 @@ def error_response(message: str, code: int = 500):
 
 
 @router.get("")
-async def get_settings(service: SettingsService = Depends(get_settings_service)):
+async def get_settings():
     try:
-        settings = await service.get_settings()
+        async with get_db() as db:
+            settings = await settings_repo.get_all(db)
         return success_response("获取设置成功", settings)
     except Exception as e:
         logger.error(f"Get settings failed: {e}")
@@ -27,12 +29,10 @@ async def get_settings(service: SettingsService = Depends(get_settings_service))
 
 
 @router.post("")
-async def save_settings(
-    request: SettingsSchema,
-    service: SettingsService = Depends(get_settings_service),
-):
+async def save_settings(request: SettingsSchema):
     try:
-        success = await service.save_settings(request)
+        async with get_db() as db:
+            success = await settings_repo.save(db, request.model_dump())
         if not success:
             return error_response("保存设置失败")
         return success_response("保存设置成功", request.model_dump())

api/routes/stats.py

@@ -1,30 +0,0 @@
-"""统计信息路由"""
-from fastapi import APIRouter, Depends
-from services.proxy_service import ProxyService
-from services.scheduler_service import SchedulerService
-from api.deps import get_proxy_service, get_scheduler_service
-from core.log import logger
-
-router = APIRouter(prefix="/api/stats", tags=["stats"])
-
-
-def success_response(message: str, data=None):
-    return {"code": 200, "message": message, "data": data}
-
-
-def error_response(message: str, code: int = 500):
-    return {"code": code, "message": message, "data": None}
-
-
-@router.get("")
-async def get_stats(
-    proxy_service: ProxyService = Depends(get_proxy_service),
-    scheduler_service: SchedulerService = Depends(get_scheduler_service),
-):
-    try:
-        stats = await proxy_service.get_stats()
-        stats["scheduler_running"] = scheduler_service.running
-        return success_response("获取统计信息成功", stats)
-    except Exception as e:
-        logger.error(f"Get stats failed: {e}")
-        return error_response("获取统计信息失败")