refactor(chat): remove frontend state saves

src/components/chat/chatStorage.test.ts

@@ -1,6 +1,9 @@
 import {
   createEmptyChatState,
-  saveActiveChatState,
+  deleteChatSession,
+  listChatSessions,
+  loadChatSessionById,
+  updateChatSessionTitle,
 } from "./chatStorage";
 
 const apiFetch = jest.fn();
@@ -9,7 +12,7 @@ jest.mock("@/lib/apiFetch", () => ({
   apiFetch: (...args: unknown[]) => apiFetch(...args),
 }));
 
-describe("chatStorage backend-only persistence", () => {
+describe("chatStorage backend session operations", () => {
   beforeEach(() => {
     apiFetch.mockReset();
   });
@@ -25,46 +28,106 @@ describe("chatStorage backend-only persistence", () => {
     expect(apiFetch).not.toHaveBeenCalled();
   });
 
-  it("creates a backend conversation when saving the first non-empty state", async () => {
-    apiFetch.mockImplementation(async (url: string, init?: RequestInit) => {
-      if (url.endsWith("/api/v1/agent/chat/session")) {
-        expect(init?.method).toBe("POST");
-        return {
-          ok: true,
-          json: async () => ({ session_id: "chat-new-1" }),
-        } as Response;
-      }
-
-      if (url.endsWith("/api/v1/agent/chat/session/chat-new-1")) {
-        expect(init?.method).toBe("PUT");
-        expect(JSON.parse(String(init?.body))).toMatchObject({
-          title: "新对话",
-          is_title_manually_edited: false,
-        });
-        return {
-          ok: true,
-          json: async () => ({ id: "chat-new-1", session_id: "chat-new-1" }),
-        } as Response;
-      }
-
-      throw new Error(`Unexpected request ${url}`);
-    });
-
-    const savedSessionId = await saveActiveChatState(
-      {
-        title: "新对话",
-        isTitleManuallyEdited: false,
-        messages: [
+  it("lists backend sessions sorted by created time", async () => {
+    apiFetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        sessions: [
           {
-            id: "message-2",
-            role: "user",
-            content: "第一条消息",
+            id: "session-old",
+            title: "旧会话",
+            created_at: "2026-01-01T00:00:00.000Z",
+            updated_at: "2026-01-02T00:00:00.000Z",
+          },
+          {
+            id: "session-new",
+            title: "新会话",
+            created_at: "2026-01-03T00:00:00.000Z",
+            updated_at: "2026-01-03T00:00:00.000Z",
+            is_streaming: true,
+            run_status: "running",
           },
         ],
-        sessionId: undefined,
-      },
-    );
+      }),
+    });
 
-    expect(savedSessionId).toBe("chat-new-1");
+    await expect(listChatSessions()).resolves.toEqual([
+      expect.objectContaining({
+        id: "session-new",
+        title: "新会话",
+        isStreaming: true,
+        runStatus: "running",
+      }),
+      expect.objectContaining({
+        id: "session-old",
+        title: "旧会话",
+      }),
+    ]);
+    expect(apiFetch.mock.calls[0][1]).toMatchObject({ method: "GET" });
+  });
+
+  it("loads a backend session state", async () => {
+    apiFetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        id: "session-1",
+        title: "管网分析",
+        is_title_manually_edited: true,
+        messages: [{ id: "message-1", role: "user", content: "查压力" }],
+        is_streaming: false,
+      }),
+    });
+
+    await expect(loadChatSessionById("session-1")).resolves.toMatchObject({
+      title: "管网分析",
+      isTitleManuallyEdited: true,
+      sessionId: "session-1",
+      messages: [{ id: "message-1", role: "user", content: "查压力" }],
+    });
+    expect(String(apiFetch.mock.calls[0][0])).toContain("/session/session-1");
+    expect(apiFetch.mock.calls[0][1]).toMatchObject({ method: "GET" });
+  });
+
+  it("updates a backend session title through the title endpoint", async () => {
+    apiFetch.mockResolvedValueOnce({
+      ok: true,
+      text: async () => "",
+    });
+
+    await updateChatSessionTitle("session-1", " 新标题 ", {
+      isTitleManuallyEdited: true,
+    });
+
+    expect(String(apiFetch.mock.calls[0][0])).toContain("/session/session-1/title");
+    expect(apiFetch.mock.calls[0][1]).toMatchObject({ method: "PATCH" });
+    expect(JSON.parse(String(apiFetch.mock.calls[0][1]?.body))).toEqual({
+      title: "新标题",
+      is_title_manually_edited: true,
+    });
+  });
+
+  it("deletes a backend session and returns the next active session id", async () => {
+    apiFetch
+      .mockResolvedValueOnce({
+        ok: true,
+        text: async () => "",
+      })
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          sessions: [
+            {
+              id: "session-next",
+              title: "下一会话",
+              created_at: "2026-01-01T00:00:00.000Z",
+              updated_at: "2026-01-01T00:00:00.000Z",
+            },
+          ],
+        }),
+      });
+
+    await expect(deleteChatSession("session-1")).resolves.toBe("session-next");
+    expect(apiFetch.mock.calls[0][1]).toMatchObject({ method: "DELETE" });
+    expect(apiFetch.mock.calls[1][1]).toMatchObject({ method: "GET" });
   });
 });