添加进度面板，优化消息处理逻辑

src/lib/chatStream.ts

@@ -4,6 +4,15 @@ import { config } from "@config/config";
 export type StreamEvent =
   | { type: "token"; sessionId: string; content: string }
   | { type: "done"; sessionId: string }
+  | {
+      type: "progress";
+      sessionId: string;
+      id: string;
+      phase: string;
+      status: "running" | "completed" | "error";
+      title: string;
+      detail?: string;
+    }
   | {
       type: "error";
       sessionId?: string;
@@ -121,6 +130,10 @@ export const streamAgentChat = async ({
           detail?: string;
           tool?: string;
           params?: Record<string, unknown>;
+          id?: string;
+          phase?: string;
+          status?: "running" | "completed" | "error";
+          title?: string;
         };
         if (event === "token") {
           onEvent({
@@ -128,6 +141,16 @@ export const streamAgentChat = async ({
             sessionId: parsed.session_id ?? "",
             content: parsed.content ?? "",
           });
+        } else if (event === "progress") {
+          onEvent({
+            type: "progress",
+            sessionId: parsed.session_id ?? "",
+            id: parsed.id ?? `${parsed.phase ?? "progress"}-${Date.now()}`,
+            phase: parsed.phase ?? "progress",
+            status: parsed.status ?? "running",
+            title: parsed.title ?? "正在处理",
+            detail: parsed.detail,
+          });
         } else if (event === "done") {
           onEvent({
             type: "done",