Add immediate startup login and loading states for mini program home

pets-fe/pages/home/home.wxml

@@ -1,5 +1,16 @@
-<page-layout id="page-layout" title="{{locationName}}" subtitle="{{headerSubtitle}}" location="{{true}}" bind:locationtap="refreshEnvironment">
+<startup-state wx:if="{{phase==='auth' || phase==='auth-error'}}" error="{{error}}" bind:retry="load" />
+<page-layout wx:else id="page-layout" title="{{locationName}}" subtitle="{{headerSubtitle}}" location="{{true}}" bind:locationtap="refreshEnvironment">
 <view class="screen">
+  <home-skeleton wx:if="{{loading && !ready}}" />
+  <view wx:elif="{{!ready && error}}" class="card home-error">
+    <app-icon kind="paw" size="54" />
+    <view class="error-title">暂时没能准备好首页</view>
+    <view class="muted">{{error}}</view>
+    <button class="primary" bindtap="load">重新加载</button>
+  </view>
+  <block wx:else>
+  <view wx:if="{{error}}" class="refresh-error"><text>更新失败，保留上次的日常记录</text><text class="link" bindtap="load">重试</text></view>
+  <view wx:elif="{{loading}}" class="refresh-hint">正在更新今天的小日常…</view>
   <view class="hero">
     <view class="hero-copy">
       <text class="hero-small">今日的主角</text>
@@ -21,9 +32,16 @@
         <view class="muted">选择同行的狗狗，一起出门转转。</view>
       </view>
     </view>
+    <view wx:if="{{!pets.length}}" class="first-pet">
+      <view class="first-pet-title">认识你的第一位毛孩子</view>
+      <view class="muted">先建立档案，再一起出门收集小快乐。</view>
+      <button class="primary start" bindtap="addPet">添加毛孩子</button>
+    </view>
+    <block wx:else>
     <view class="picker-label">这次带谁？可以多选</view>
     <pet-picker pets="{{pets}}" selected="{{selected}}" bind:change="pick" />
     <button class="primary start" bindtap="start">开始遛狗 →</button>
+    </block>
   </view>
   <view class="stats">
     <view>
@@ -75,6 +93,7 @@
       今天还没有任务，给狗狗安排一件小事吧
     </view>
   </view>
+  </block>
 </view>
 </page-layout>
-<tab-bar current="/pages/home/home" />
+<tab-bar wx:if="{{ready}}" current="/pages/home/home" />