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/pages/index/index.wxml

@@ -0,0 +1,41 @@
+<view class="home">
+  <view class="header">
+    <view class="greeting">{{greeting}}</view>
+    <view class="location-badge" bind:tap="chooseLocation">{{locationText}}</view>
+  </view>
+
+  <view class="hero">
+    <view class="hero-emoji">🎁</view>
+    <view class="hero-title">今天吃啥？</view>
+    <view class="hero-subtitle">开个盲盒</view>
+  </view>
+
+  <view class="modes">
+    <mode-card
+      type="takeout"
+      icon="🛵"
+      title="外卖盲盒"
+      desc="随机高质量外卖"
+      actionText="开个外卖盒"
+      bind:open="onOpenBox"
+    />
+    <mode-card
+      type="fridge"
+      icon="🥬"
+      title="冰箱盲盒"
+      desc="有啥食材做啥菜"
+      actionText="开个冰箱盒"
+      bind:open="onOpenBox"
+    />
+    <mode-card
+      type="explore"
+      icon="🍱"
+      title="探店盲盒"
+      desc="发现隐藏好店"
+      actionText="开个附近盒"
+      bind:open="onOpenBox"
+    />
+  </view>
+
+  <view class="daily-tip">{{dailyTip}}</view>
+</view>