Add FastAPI backend with agent system

backend/app/agents/tools/__init__.py

@@ -0,0 +1,22 @@
+from app.agents.tools.search import (
+    search_knowledge, get_knowledge_graph_context,
+    build_knowledge_graph, hybrid_search,
+)
+from app.agents.tools.task import get_tasks, create_task, update_task_status
+from app.agents.tools.forum import get_forum_posts, create_forum_post, scan_forum_for_instructions
+
+ALL_TOOLS = [
+    # 知识库工具
+    search_knowledge,
+    get_knowledge_graph_context,
+    build_knowledge_graph,
+    hybrid_search,
+    # 任务工具
+    get_tasks,
+    create_task,
+    update_task_status,
+    # 论坛工具
+    get_forum_posts,
+    create_forum_post,
+    scan_forum_for_instructions,
+]