fix: 首页我的计划点击跳转错页 + feat: 新增留言反馈功能

fix:
- 首页'我的计划'卡片误绑 onExercise（跳动作详情），改为 onPlanTap 正确跳训练计划详情页
- 修复后点击计划可正常打开 plan-detail

feat(留言反馈):
- 后端新增 feedback 模块：POST /api/feedback（AuthGuard，content 必填/contact 选填），JsonStore 持久化
- 前端新增 pages/feedback 页面（留言内容 textarea + 联系方式选填 + 提交），profile 菜单新增'意见反馈'入口
- icon-svg 新增 message-circle 图标（反馈页用）

miniprogram/pages/feedback/feedback.js

@@ -0,0 +1,56 @@
+const app = getApp();
+const auth = require('../../utils/auth');
+const fbSvc = require('../../services/feedback');
+
+Page({
+  data: {
+    statusBarHeight: 20,
+    content: '',
+    contact: '',
+    count: 0,
+    maxLen: 1000,
+    submitting: false
+  },
+
+  onLoad() {
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 20 });
+  },
+
+  onContentInput(e) {
+    const content = e.detail.value;
+    this.setData({ content, count: content.length });
+  },
+
+  onContactInput(e) {
+    this.setData({ contact: e.detail.value });
+  },
+
+  onSubmit() {
+    const content = (this.data.content || '').trim();
+    if (!content) {
+      wx.showToast({ title: '请填写留言内容', icon: 'none' });
+      return;
+    }
+    if (this.data.submitting) return;
+    this.setData({ submitting: true });
+    wx.showLoading({ title: '提交中…', mask: true });
+    fbSvc
+      .submit(content, (this.data.contact || '').trim())
+      .then(() => {
+        wx.hideLoading();
+        this.setData({ submitting: false, content: '', contact: '', count: 0 });
+        wx.showModal({
+          title: '已收到反馈',
+          content: '感谢你的留言，我们会认真查看！',
+          showCancel: false,
+          confirmText: '好的'
+        });
+      })
+      .catch((err) => {
+        wx.hideLoading();
+        this.setData({ submitting: false });
+        const msg = (err && err.message) || '提交失败，请稍后再试';
+        wx.showToast({ title: msg, icon: 'none' });
+      });
+  }
+});

miniprogram/pages/feedback/feedback.json

@@ -0,0 +1,8 @@
+{
+  "navigationStyle": "custom",
+  "usingComponents": {
+    "navbar": "/components/navbar/index",
+    "bottom-nav": "/components/bottom-nav/index",
+    "fc-icon": "/components/fc-icon/index"
+  }
+}

miniprogram/pages/feedback/feedback.wxml

@@ -0,0 +1,39 @@
+<view class="page" style="padding-top: {{statusBarHeight}}px;">
+  <navbar title="意见反馈" show-back />
+
+  <view class="intro">
+    <fc-icon name="message-circle" size="28" color="var(--accent)" />
+    <view class="intro__txt">遇到问题或有好点子？留言告诉我们，帮助我们做得更好。</view>
+  </view>
+
+  <view class="card">
+    <view class="field">
+      <view class="field__label">留言内容</view>
+      <textarea
+        class="field__textarea"
+        placeholder="说说你的想法、遇到的问题或建议…"
+        placeholder-class="ph"
+        maxlength="{{maxLen}}"
+        value="{{content}}"
+        bindinput="onContentInput"
+      />
+      <view class="field__count">{{count}}/{{maxLen}}</view>
+    </view>
+
+    <view class="field">
+      <view class="field__label">联系方式<text class="field__opt">（选填）</text></view>
+      <input
+        class="field__input"
+        placeholder="手机号 / 微信，方便我们回访"
+        placeholder-class="ph"
+        value="{{contact}}"
+        bindinput="onContactInput"
+      />
+    </view>
+  </view>
+
+  <view class="submit" bindtap="onSubmit">提交反馈</view>
+
+  <view style="height: 160rpx;"></view>
+  <bottom-nav active="mine" />
+</view>

miniprogram/pages/feedback/feedback.wxss

@@ -0,0 +1,81 @@
+.page {
+  min-height: 100vh;
+  background: var(--page);
+  color: var(--text);
+}
+
+.intro {
+  display: flex;
+  align-items: center;
+  gap: 16rpx;
+  padding: 32rpx 32rpx 8rpx;
+}
+.intro__txt {
+  flex: 1;
+  font-size: 26rpx;
+  line-height: 1.6;
+  color: var(--text-2);
+}
+
+.card {
+  margin: 24rpx 32rpx;
+  background: var(--surface);
+  border: 1rpx solid var(--hairline);
+  border-radius: 24rpx;
+  padding: 8rpx 28rpx;
+}
+
+.field {
+  padding: 24rpx 0;
+  position: relative;
+}
+.field + .field {
+  border-top: 1rpx solid var(--hairline);
+}
+.field__label {
+  font-size: 26rpx;
+  font-weight: 600;
+  color: var(--text);
+  margin-bottom: 16rpx;
+}
+.field__opt {
+  font-weight: 400;
+  color: var(--text-3);
+}
+.field__textarea {
+  width: 100%;
+  height: 220rpx;
+  font-size: 28rpx;
+  line-height: 1.6;
+  color: var(--text);
+}
+.field__count {
+  text-align: right;
+  font-size: 22rpx;
+  color: var(--text-3);
+  margin-top: 8rpx;
+}
+.field__input {
+  font-size: 28rpx;
+  color: var(--text);
+  padding: 8rpx 0;
+}
+.ph {
+  color: var(--text-3);
+}
+
+.submit {
+  margin: 40rpx 32rpx;
+  height: 92rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--accent);
+  color: var(--accent-on);
+  font-size: 30rpx;
+  font-weight: 700;
+  border-radius: 999rpx;
+}
+.submit:active {
+  background: var(--accent-hover);
+}

miniprogram/pages/index/index.wxml

@@ -30,7 +30,7 @@
     <view class="personal__block" wx:if="{{myPlans.length}}">
       <view class="personal__sub">我的计划</view>
       <view class="plan-row">
-        <view class="plan-chip" wx:for="{{myPlans}}" wx:key="id" data-id="{{item.id}}" bindtap="onExercise">
+        <view class="plan-chip" wx:for="{{myPlans}}" wx:key="id" data-id="{{item.id}}" bindtap="onPlanTap">
           <fc-icon name="clipboard-list" size="20" color="var(--accent)" />
           <view class="plan-chip__body">
             <text class="plan-chip__name">{{item.name}}</text>

miniprogram/pages/profile/profile.js

@@ -126,6 +126,7 @@ Page({
   goPlans() { wx.navigateTo({ url: '/pages/my-plans/my-plans' }); },
   goFavPlans() { wx.navigateTo({ url: '/pages/plan-favorites/plan-favorites' }); },
   goOfficial() { wx.navigateTo({ url: '/pages/collection/collection' }); },
+  goFeedback() { wx.navigateTo({ url: '/pages/feedback/feedback' }); },
 
   noop() {}
 });

miniprogram/pages/profile/profile.wxml

@@ -57,6 +57,11 @@
         <text class="cell__label">官方训练计划</text>
         <text class="cell__arrow">›</text>
       </view>
+      <view class="cell" bindtap="goFeedback">
+        <fc-icon class="cell__icon" name="message-circle" size="24" color="var(--text-2)" />
+        <text class="cell__label">意见反馈</text>
+        <text class="cell__arrow">›</text>
+      </view>
     </view>
 
     <view class="logout" bindtap="onLogout">退出登录</view>