fix(chat): remove regenerate action

src/components/chat/hooks/useAgentChatSession.actions.test.tsx

@@ -359,84 +359,6 @@ describe("useAgentChatSession actions", () => {
     );
   });
 
-  it("asks the backend to undo the previous user turn before regenerating", async () => {
-    listChatSessions.mockResolvedValue([]);
-
-    const { result } = renderHook(() =>
-      useAgentChatSession({
-        projectId: "project-1",
-        onToolCall: jest.fn(),
-      }),
-    );
-
-    await waitFor(() => expect(result.current.isHydrating).toBe(false));
-
-    await act(async () => {
-      await result.current.sendPrompt("重新分析压力异常");
-    });
-    const assistantMessageId = result.current.messages[1]?.id ?? "";
-
-    await act(async () => {
-      await result.current.regenerate(assistantMessageId);
-    });
-
-    expect(streamAgentChat).toHaveBeenNthCalledWith(
-      2,
-      expect.objectContaining({
-        message: "重新分析压力异常",
-        regenerateFromMessageIndex: 0,
-      }),
-    );
-  });
-
-  it("replaces the current chain when regenerating a middle assistant message", async () => {
-    listChatSessions.mockResolvedValue([]);
-
-    const { result } = renderHook(() =>
-      useAgentChatSession({
-        projectId: "project-1",
-        onToolCall: jest.fn(),
-      }),
-    );
-
-    await waitFor(() => expect(result.current.isHydrating).toBe(false));
-
-    await act(async () => {
-      await result.current.sendPrompt("第一轮");
-    });
-
-    await act(async () => {
-      await result.current.sendPrompt("第二轮");
-    });
-
-    const firstAssistantMessageId = result.current.messages[1]?.id ?? "";
-
-    await act(async () => {
-      await result.current.regenerate(firstAssistantMessageId);
-    });
-
-    expect(result.current.messages).toHaveLength(2);
-    expect(result.current.messages[0]).toEqual(
-      expect.objectContaining({
-        role: "user",
-        content: "第一轮",
-      }),
-    );
-    expect(result.current.messages[1]).toEqual(
-      expect.objectContaining({
-        role: "assistant",
-        content: "",
-      }),
-    );
-    expect(streamAgentChat).toHaveBeenNthCalledWith(
-      3,
-      expect.objectContaining({
-        message: "第一轮",
-        regenerateFromMessageIndex: 0,
-      }),
-    );
-  });
-
   it("forks a copied conversation from an assistant message", async () => {
     listChatSessions.mockResolvedValue([]);