refactor: unify system tools as resources

backend/db/models.py

@@ -154,8 +154,6 @@ class Assistant(Base):
     enable_interrupt: Mapped[bool] = mapped_column(Boolean, default=True)
     turn_config: Mapped[dict] = mapped_column(JSON, default=dict)
     startup: Mapped[dict] = mapped_column(JSON, default=dict)
-    # Prompt 助手级系统工具；Workflow 的权限保存在各 Agent 节点中。
-    system_tools: Mapped[list] = mapped_column(JSON, default=list)
     vision_enabled: Mapped[bool] = mapped_column(Boolean, default=False)
     vision_model_resource_id: Mapped[str | None] = mapped_column(
         String(40),

backend/db/session.py

@@ -10,6 +10,7 @@ import json
 
 import settings
 from services.interface_catalog import INTERFACE_DEFINITIONS
+from services.system_tools import SYSTEM_TOOL_SPECS
 from sqlalchemy import text
 from sqlalchemy.ext.asyncio import (
     AsyncSession,
@@ -49,24 +50,31 @@ async def sync_interface_definitions() -> None:
 
 async def sync_default_tools() -> None:
     """Ensure system-provided reusable tools exist without overwriting edits."""
-    default_tools = [
-        {
-            "id": "tool_end_call_default",
-            "name": "结束对话",
-            "function_name": "end_call",
-            "type": "system",
-            "description": "当用户明确要求结束对话，或任务已完成时调用。",
-            "definition": {
-                "schema_version": 1,
-                "type": "system",
-                "config": {
-                    "kind": "end_conversation",
+    default_system_tools = []
+    for kind, spec in SYSTEM_TOOL_SPECS.items():
+        config: dict[str, object] = {"kind": kind}
+        if kind == "end_conversation":
+            config.update(
+                {
                     "message_type": "none",
                     "custom_message": "",
                     "capture_reason": True,
+                }
+            )
+        default_system_tools.append(
+            {
+                **spec,
+                "type": "system",
+                "definition": {
+                    "schema_version": 1,
+                    "type": "system",
+                    "config": config,
                 },
-            },
-        },
+            }
+        )
+
+    default_tools = [
+        *default_system_tools,
         {
             "id": "tool_show_message_default",
             "name": "显示确认消息",