feat: support shared pet care tasks and smooth daily page return

tests/miniprogram-startup.test.cjs

@@ -88,13 +88,13 @@ test("缓存 token 过期时只重新登录一次，延迟的旧 401 不清除
   assert.equal(r.logins.length, 1);
 });
 
-function home(login, secure) {
+function home(login, secure, app = { login }) {
   let definition;
   const wx = { getStorageSync: () => [], navigateTo: () => {} };
   vm.runInNewContext(fs.readFileSync("pets-fe/pages/home/home.js", "utf8"), {
     wx,
     Date,
-    getApp: () => ({ login }),
+    getApp: () => app,
     Page: (value) => {
       definition = value;
     },
@@ -193,3 +193,40 @@ test("首页请求失败不显示空数据状态，刷新失败保留已有记
   assert.equal(page.data.pets[0].id, "existing");
   assert.equal(page.data.error, "网络异常");
 });
+
+test("从其他页面回到日常立即显示已有数据，后台刷新不清空内容", async () => {
+  const app = { login: async () => "token", globalData: { token: "token", user: { id: "user-1" } } };
+  const first = home(app.login, data, app);
+  await first.load();
+  first.setData({ pets: [{ id: "pet-1" }], tasks: [{ id: "task-1", completed: true }], undoneCount: 0 });
+  first.onUnload();
+  let finish;
+  const pending = new Promise((resolve) => { finish = resolve; });
+  const next = home(app.login, async (route) => { await pending; return data(route); }, app);
+  next.onLoad();
+  assert.equal(next.data.ready, true);
+  assert.equal(next.data.phase, "ready");
+  assert.equal(next.data.pets[0].id, "pet-1");
+  assert.equal(next.data.tasks[0].completed, true);
+  const refreshing = next.load();
+  await tick();
+  assert.equal(next.data.ready, true);
+  assert.equal(next.data.pets[0].id, "pet-1");
+  finish();
+  await refreshing;
+  assert.equal(next.data.loading, false);
+});
+
+test("日常缓存不跨账号、不显示上一天的任务", async () => {
+  const app = { login: async () => "token", globalData: { user: { id: "new-user" } }, homeSnapshot: {
+    account: "old-user", date: "2026-10-05", data: { pets: [{ id: "private" }] },
+  } };
+  const page = home(app.login, data, app);
+  page.onLoad();
+  assert.equal(page.data.ready, false);
+  assert.equal(page.data.pets.length, 0);
+  app.homeSnapshot.account = "new-user";
+  app.homeSnapshot.date = "2026-10-04";
+  page.onLoad();
+  assert.equal(page.data.ready, false);
+});