[feature] adds web_search and fetch_url tool calls

web/src/lib/api.ts

@@ -23,6 +23,20 @@ export type Message = {
   role: "system" | "user" | "assistant" | "tool";
   content: string;
   name: string | null;
+  metadata: unknown | null;
+};
+
+export type ToolCallEvent = {
+  toolCallId: string;
+  name: string;
+  status: "completed" | "failed";
+  summary: string;
+  args: Record<string, unknown>;
+  startedAt: string;
+  completedAt: string;
+  durationMs: number;
+  error?: string;
+  resultPreview?: string;
 };
 
 export type ChatDetail = {
@@ -113,6 +127,7 @@ type CompletionResponse = {
 
 type CompletionStreamHandlers = {
   onMeta?: (payload: { chatId: string; callId: string; provider: Provider; model: string }) => void;
+  onToolCall?: (payload: ToolCallEvent) => void;
   onDelta?: (payload: { text: string }) => void;
   onDone?: (payload: { text: string; usage?: { inputTokens?: number; outputTokens?: number; totalTokens?: number } }) => void;
   onError?: (payload: { message: string }) => void;
@@ -415,6 +430,7 @@ export async function runCompletionStream(
     }
 
     if (eventName === "meta") handlers.onMeta?.(payload);
+    else if (eventName === "tool_call") handlers.onToolCall?.(payload);
     else if (eventName === "delta") handlers.onDelta?.(payload);
     else if (eventName === "done") handlers.onDone?.(payload);
     else if (eventName === "error") handlers.onError?.(payload);