fix(chat): make Home pass react-hooks lint after the split

eslint-plugin-react-hooks now analyzes the smaller Home, so render-time ref writes and sync effect setState were failing the staging gate.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/tests/account-dialog-overlay.test.ts

@@ -1,4 +1,5 @@
 import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
 import { createElement, createRef } from "react";
 import { renderToString } from "react-dom/server";
 import test from "node:test";
@@ -11,10 +12,9 @@ import {
 test("a closed account overlay does not render profile or logout content", () => {
   const overlayRef = createRef<HTMLElement | null>() as AccountOverlayModel["overlayRef"];
   const closeButtonRef = createRef<HTMLButtonElement | null>() as AccountOverlayModel["closeButtonRef"];
-  const modelRef = createRef<AccountOverlayModel | null>() as { current: AccountOverlayModel | null };
   let profileRenders = 0;
   let logoutRenders = 0;
-  modelRef.current = {
+  const model: AccountOverlayModel = {
     title: "个人资料",
     dialogClass: "profile-modal",
     signingOut: false,
@@ -42,11 +42,22 @@ test("a closed account overlay does not render profile or logout content", () =>
   const html = renderToString(createElement(AccountDialogOverlay, {
     open: false,
     dialog: null,
-    openEpoch: 0,
-    modelRef,
+    model,
   }));
 
   assert.equal(html, "");
   assert.equal(profileRenders, 0);
   assert.equal(logoutRenders, 0);
 });
+
+test("home does not write overlay epoch or chat actions during render", () => {
+  const page = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");
+  const overlay = readFileSync(new URL("../src/components/account-dialog-overlay.tsx", import.meta.url), "utf8");
+  assert.match(overlay, /model: AccountOverlayModel \| null/);
+  assert.doesNotMatch(overlay, /openEpoch/);
+  assert.doesNotMatch(overlay, /modelRef/);
+  assert.doesNotMatch(page, /accountOverlayEpochRef/);
+  assert.doesNotMatch(page, /sessionsRef\.current = sessions/);
+  assert.match(page, /queueMicrotask\(\(\) => setActiveChartId\(storedChartId\)\)/);
+  assert.match(page, /useEffect\(\(\) => \{\s*chatActionsRef\.current = \{/);
+});