feat: 添加线索引擎、NLQ、场景检测、前端界面等核心功能模块

backend/app/llm/factory.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from app.config import EGRESS_PROVIDERS, LLMProviderName, Settings, get_settings
 from app.llm.base import LLMProvider
-from app.llm.providers import DashScopeProvider, VllmProvider
+from app.llm.providers import DashScopeProvider, MockProvider, VllmProvider
 
 
 class EgressPolicyError(RuntimeError):
@@ -27,5 +27,7 @@ def get_llm_provider(settings: Settings | None = None) -> LLMProvider:
         )
     if settings.llm_provider == LLMProviderName.vllm:
         return VllmProvider(base_url=settings.vllm_base_url, model=settings.vllm_model)
+    if settings.llm_provider == LLMProviderName.mock:
+        return MockProvider()
 
     raise ValueError(f"未知的 LLM Provider: {settings.llm_provider}")