feat: 新增语音记录饮食功能与开发者调试模块

- 集成 @react-native-voice/voice 实现中文语音识别，支持“一句话记录”餐食
- 新增语音录制页面，含波形动画、音量反馈与识别结果确认
- FloatingFoodOverlay 新增语音入口，打通拍照/库/语音三种记录方式
- 添加麦克风与语音识别权限描述（iOS Info.plist 与 Android manifest）
- 实现开发者模式：连续三次点击用户名激活，含日志查看、导出与清除
- 新增 logger 工具类，统一日志存储（AsyncStorage）与按级别输出
- 重构 BackgroundTaskManager 为单例并支持 Promise 初始化，避免重复注册
- 移除 sleep-detail 多余渐变背景，改用 ThemedView 统一主题
- 新增通用 haptic 反馈函数，支持多种震动类型（iOS only）
- 升级 expo-background-task、expo-notifications、expo-task-manager 至兼容版本

app/developer.tsx

@@ -0,0 +1,148 @@
+import { ROUTES } from '@/constants/Routes';
+import { useRouter } from 'expo-router';
+import React from 'react';
+import { ScrollView, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { Ionicons } from '@expo/vector-icons';
+
+export default function DeveloperScreen() {
+  const router = useRouter();
+  const insets = useSafeAreaInsets();
+
+  const developerItems = [
+    {
+      title: '日志',
+      subtitle: '查看应用运行日志',
+      icon: 'document-text-outline',
+      onPress: () => router.push(ROUTES.DEVELOPER_LOGS),
+    },
+  ];
+
+  return (
+    <View style={[styles.container, { paddingTop: insets.top }]}>
+      {/* Header */}
+      <View style={styles.header}>
+        <TouchableOpacity onPress={() => router.back()} style={styles.backButton}>
+          <Ionicons name="chevron-back" size={24} color="#2C3E50" />
+        </TouchableOpacity>
+        <Text style={styles.title}>开发者</Text>
+        <View style={styles.placeholder} />
+      </View>
+
+      <ScrollView style={styles.scrollView} showsVerticalScrollIndicator={false}>
+        <View style={styles.content}>
+          <View style={styles.cardContainer}>
+            {developerItems.map((item, index) => (
+              <TouchableOpacity
+                key={index}
+                style={[
+                  styles.menuItem,
+                  index === developerItems.length - 1 && { borderBottomWidth: 0 }
+                ]}
+                onPress={item.onPress}
+              >
+                <View style={styles.menuItemLeft}>
+                  <View style={styles.iconContainer}>
+                    <Ionicons
+                      name={item.icon as any}
+                      size={20}
+                      color="#9370DB"
+                    />
+                  </View>
+                  <View style={styles.textContainer}>
+                    <Text style={styles.menuItemTitle}>{item.title}</Text>
+                    <Text style={styles.menuItemSubtitle}>{item.subtitle}</Text>
+                  </View>
+                </View>
+                <Ionicons name="chevron-forward" size={20} color="#CCCCCC" />
+              </TouchableOpacity>
+            ))}
+          </View>
+        </View>
+      </ScrollView>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: '#F8F9FA',
+  },
+  header: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    paddingHorizontal: 16,
+    paddingVertical: 12,
+    backgroundColor: '#FFFFFF',
+    borderBottomWidth: 1,
+    borderBottomColor: '#E5E7EB',
+  },
+  backButton: {
+    width: 40,
+    height: 40,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  title: {
+    fontSize: 18,
+    fontWeight: 'bold',
+    color: '#2C3E50',
+  },
+  placeholder: {
+    width: 40,
+  },
+  scrollView: {
+    flex: 1,
+  },
+  content: {
+    padding: 16,
+  },
+  cardContainer: {
+    backgroundColor: '#FFFFFF',
+    borderRadius: 12,
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.05,
+    shadowRadius: 4,
+    elevation: 2,
+    overflow: 'hidden',
+  },
+  menuItem: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    paddingVertical: 16,
+    paddingHorizontal: 16,
+    borderBottomWidth: 1,
+    borderBottomColor: '#F1F3F4',
+  },
+  menuItemLeft: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    flex: 1,
+  },
+  iconContainer: {
+    width: 40,
+    height: 40,
+    borderRadius: 8,
+    backgroundColor: 'rgba(147, 112, 219, 0.1)',
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginRight: 12,
+  },
+  textContainer: {
+    flex: 1,
+  },
+  menuItemTitle: {
+    fontSize: 16,
+    color: '#2C3E50',
+    fontWeight: '600',
+    marginBottom: 2,
+  },
+  menuItemSubtitle: {
+    fontSize: 13,
+    color: '#6B7280',
+  },
+});