feat: 添加平台管理、计算模块适配器及前端页面更新

- 新增 platform API 端点和存储
- 新增 llama_factory 适配器
- 新增前端 compute、guide、system 等视图页面
- 新增 echarts 插件和 mock 数据
- 更新 Docker 配置、后端配置及文档
- 更新前端路由、API、侧边栏等组件

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/core/config.py

@@ -1,4 +1,4 @@
-from dataclasses import dataclass
+from dataclasses import dataclass
 from functools import lru_cache
 import os
 
@@ -15,6 +15,11 @@ class Settings:
     app_name: str = os.getenv("APP_NAME", "YG Fine-Tune Platform API")
     app_env: str = os.getenv("APP_ENV", "local")
     api_prefix: str = os.getenv("API_PREFIX", "/api")
+    app_mode: str = os.getenv("APP_MODE", "local")
+    local_db_path: str = os.getenv("LOCAL_DB_PATH", "./runtime/platform.db")
+    compute_mode: str = os.getenv("COMPUTE_MODE", "simulator")
+    compute_status_sync_mode: str = os.getenv("COMPUTE_STATUS_SYNC_MODE", "polling")
+    compute_poll_interval_seconds: int = _int_env("COMPUTE_POLL_INTERVAL_SECONDS", 3)
     log_level: str = os.getenv("LOG_LEVEL", "INFO")
     log_dir: str = os.getenv("LOG_DIR", "./logs")
     log_file_prefix: str = os.getenv("LOG_FILE_PREFIX", "backend")
@@ -26,3 +31,4 @@ class Settings:
 @lru_cache
 def get_settings() -> Settings:
     return Settings()
+