Add manual opener tool calls to Assistant model and API

- Introduced `manual_opener_tool_calls` field in the Assistant model to support custom tool calls.
- Updated AssistantBase and AssistantUpdate schemas to include the new field.
- Implemented normalization and migration logic for handling manual opener tool calls in the API.
- Enhanced runtime metadata to include manual opener tool calls in responses.
- Updated tests to validate the new functionality and ensure proper handling of tool calls.
- Refactored tool ID normalization to support legacy tool names for backward compatibility.

web/pages/ToolLibrary.tsx

@@ -733,7 +733,7 @@ export const ToolLibraryPage: React.FC = () => {
             <Input
               value={toolId}
               onChange={(e) => setToolId(e.target.value)}
-              placeholder="例如: voice_message_prompt（留空自动生成）"
+              placeholder="例如: voice_msg_prompt（留空自动生成）"
               disabled={Boolean(editingTool)}
             />
             <p className="text-[11px] text-muted-foreground">