refactor(chat): remove frontend state saves

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

@@ -24,7 +24,6 @@ jest.mock("@/lib/chatStream", () => ({
 
 const listChatSessions = jest.fn();
 const deleteChatSession = jest.fn();
-const saveActiveChatState = jest.fn();
 const updateChatSessionTitle = jest.fn();
 
 jest.mock("../chatStorage", () => ({
@@ -42,7 +41,6 @@ jest.mock("../chatStorage", () => ({
     messages: [],
     sessionId: "session-loaded",
   })),
-  saveActiveChatState: (...args: unknown[]) => saveActiveChatState(...args),
   updateChatSessionTitle: (...args: unknown[]) => updateChatSessionTitle(...args),
 }));
 
@@ -50,7 +48,6 @@ describe("useAgentChatSession", () => {
   beforeEach(() => {
     listChatSessions.mockReset();
     deleteChatSession.mockReset();
-    saveActiveChatState.mockReset();
     updateChatSessionTitle.mockReset();
     jest.mocked(abortAgentChat).mockReset();
     jest.mocked(forkAgentChat).mockReset();
@@ -65,7 +62,6 @@ describe("useAgentChatSession", () => {
     jest.mocked(resumeAgentChatStream).mockImplementation(async () => undefined);
     jest.mocked(streamAgentChat).mockImplementation(async () => undefined);
     deleteChatSession.mockImplementation(async () => undefined);
-    saveActiveChatState.mockImplementation(async (state) => state.sessionId);
     updateChatSessionTitle.mockImplementation(async () => undefined);
   });