feat: 电子药箱小程序 - 4Tab药品管理

- 电子药箱: 药品库存管理 + 手动录入 + 今日用药打卡
- 药品百科: 搜索 + 分类筛选 + 20种药品静态数据
- 惠教中心: 4条药品使用指南课程
- 我的: 家庭成员信息管理
- 自定义TabBar + navigation-bar组件
- SVG药品分类插图

miniprogram/components/my-video/my-video.wxml

@@ -0,0 +1,33 @@
+<!--components/my-video.wxml-->
+<view class="live-content">
+  <video id="videoPlayer" 
+        class="video"
+        danmu-list="{{danmuList}}"
+        enable-danmu="{{false}}"
+        show-fullscreen-btn 
+        show-center-play-btn='{{false}}'
+        enable-progress-gesture="{{false}}"
+        show-play-btn="{{true}}"
+        controls="{{true}}"
+        object-fit="contain"
+        picture-in-picture-mode="{{[]}}"
+        show-background-playback-button="{{false}}"
+        src="{{src}}"
+        bindended="handleEnded"
+        binderror="handleError"
+        bindpause="handlePause"
+        bindtimeupdate="handleTimeUpdate"
+        bindfullscreenchange="handleFullscreenChange"
+        bindloadedmetadata="handleLoadedMetadata"
+        >
+        <cover-view class="cover"></cover-view>
+        <image wx:if="{{!playing}}" src="{{backgroundUrl}}" mode="aspectFill" class="poster-image"></image>
+        <view class="video-poster" wx:if="{{!playing}}" catchtap="handlePosterTap">
+            <view class="play-button">
+                <view class="play-icon">
+                    ▶
+                </view>
+            </view>
+        </view>
+    </video>
+</view>