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/utils/location.js

@@ -0,0 +1,37 @@
+const app = getApp();
+
+function getLocation() {
+  return new Promise((resolve, reject) => {
+    const cached = app.globalData.location;
+    if (cached) {
+      resolve(cached);
+      return;
+    }
+
+    wx.getLocation({
+      type: 'gcj02',
+      success: (res) => {
+        const loc = { latitude: res.latitude, longitude: res.longitude };
+        app.globalData.location = loc;
+        resolve(loc);
+      },
+      fail: (err) => {
+        // 常见错误：未授权、隐私协议未同意
+        const msg = err.errMsg || '';
+        if (msg.indexOf('auth deny') >= 0 || msg.indexOf('authorize') >= 0) {
+          wx.showModal({
+            title: '需要定位权限',
+            content: '请在设置中允许小程序获取位置，或点击右上角手动选择位置',
+            confirmText: '去设置',
+            success: (res) => {
+              if (res.confirm) wx.openSetting();
+            }
+          });
+        }
+        reject(new Error('定位失败'));
+      }
+    });
+  });
+}
+
+module.exports = { getLocation };