fix: 修复 VoiceController Map.of 兼容性 + ExploreController 参数不匹配

- VoiceController: Map.of() -> Collections.singletonMap() 兼容 Java 8
- ExploreController: 补齐 takeoutService.roll() 缺失的 taste/priceRange/allergies 参数

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

miniapp/components/mode-card/mode-card.wxml

@@ -0,0 +1,10 @@
+<view class="mode-card {{type}}" bind:tap="onTap">
+  <view class="card-icon-wrap">
+    <text class="card-icon">{{icon}}</text>
+  </view>
+  <view class="card-body">
+    <view class="card-title">{{title}}</view>
+    <view class="card-desc">{{desc}}</view>
+  </view>
+  <view class="card-action">{{actionText}}</view>
+</view>