feat: 收视分析后端 API + 前端 service

backend/app/main.py

@@ -17,6 +17,7 @@ from app.api.yearly_targets import router as yearly_targets_router
 from app.api.dashboard import router as dashboard_router
 from app.api.schedules import router as schedules_router
 from app.api.knowledge import router as knowledge_router
+from app.api.analytics import router as analytics_router
 from app.core.config import settings
 
 app = FastAPI(title="军事科技工作台", version="0.1.0")
@@ -51,6 +52,7 @@ app.include_router(users_router)
 app.include_router(dashboard_router)
 app.include_router(schedules_router)
 app.include_router(knowledge_router)
+app.include_router(analytics_router)
 
 # 挂载静态文件目录（题图海报）
 _static_dir = Path(__file__).parent.parent / "static"