feat: 宠物加性格/过敏/备注字段 + 身份卡照护信息 + 微信取手机号

- Pet 增 personality/allergy/notes；建档表单加「性格标签(多选)/过敏/备注」
- IDCard 增 color/personality/owner/phone(脱敏)/allergy/notes/疫苗驱虫状态/发证机构
- 微信取手机号：POST /api/user/phone 用 getPhoneNumber 的 code 换手机号存库
  (BindPhoneByCode 走 getuserphonenumber，复用 access_token)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pets-fe/pages/petform/petform.wxml

@@ -74,6 +74,16 @@
       <view class="field"><label>毛色</label>
         <input class="input" placeholder="例如：橘白 / 奶牛 / 黑" placeholder-class="placeholder"
                value="{{form.color}}" maxlength="16" bindinput="onColor"/></view>
+      <view class="field"><label>性格标签</label><view class="mini-options">
+        <view wx:for="{{personaTags}}" wx:key="*this" class="option {{personaSel[item] ? 'selected' : ''}}"
+              data-v="{{item}}" bindtap="togglePersona">{{item}}</view>
+      </view></view>
+      <view class="field"><label>过敏情况</label>
+        <input class="input" placeholder="没有就填「无」" placeholder-class="placeholder"
+               value="{{form.allergy}}" maxlength="32" bindinput="onAllergy"/></view>
+      <view class="field"><label>备注（身份卡背面显示）</label>
+        <textarea class="textarea" placeholder="如：肠胃敏感，请勿喂陌生食物" placeholder-class="placeholder"
+                  value="{{form.notes}}" maxlength="80" bindinput="onNotes"></textarea></view>
       <view class="field"><label>当前阶段</label><view class="mini-options">
         <view wx:for="{{stages}}" wx:key="*this" class="option {{form.stage === item ? 'selected' : ''}}"
               data-v="{{item}}" bindtap="pickStage">{{item}}</view>