feat: 增加案例/任务日志/LLM配置/系统配置管理功能\n\n- 扩展案例数据至30个\n- 新增Case, TaskLog, LLMConfig, SystemConfig的API路由\n- 完善initial_data导入脚本\n- 创建前端管理页面admin.html，支持完整增删改查\n- 更新导航菜单，增加系统管理入口

platform/backend/app/main.py

@@ -9,7 +9,7 @@ from pathlib import Path
 
 from .database import engine, get_db, init_db
 from .models import Base
-from .api import topics, system, articles, publishing, auth, admin, audit, optimizer_logs
+from .api import topics, system, articles, publishing, auth, admin, audit, optimizer_logs, cases, task_logs, llm_configs, system_configs
 from .initial_data import import_initial_data
 
 app = FastAPI(title="宇之然内容创作平台", version="0.1.0")
@@ -38,6 +38,10 @@ app.include_router(auth.router)
 app.include_router(admin.router)
 app.include_router(audit.router)
 app.include_router(optimizer_logs.router)
+app.include_router(cases.router)
+app.include_router(task_logs.router)
+app.include_router(llm_configs.router)
+app.include_router(system_configs.router)
 
 # 挂载前端
 FRONTEND_DIR = Path(__file__).parent.parent.parent / "frontend"