feat: guided light meditation + Edge TTS neural voice audio

- Add continuous guided light-body-scan meditation (16 segments, 97% coverage)
- Edge TTS API endpoint with Xiaoxiao neural voice at -40% rate
- Pre-generated chime WAVs and guidance MP3s in public/audio/
- Mute toggle in practice page, sequenced non-overlapping audio
- Fix middleware to serve /audio and /api/audio/tts without auth
- All LLM output localized to Chinese; fix blank home/settings pages
- DeepSeek API compat: json_object, increased max_tokens
- Analytics, cron reminders, onboarding flow fixes

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/engines/reward-generator.ts

@@ -23,56 +23,56 @@ interface RewardContext {
 // ---------------------------------------------------------------------------
 
 const FIRST_SESSION_MESSAGES = [
-  "Your first practice is complete. This is where the path begins — not with a destination, but with a single step.",
-  "Day one. You didn't just think about it — you did it. That's the difference that makes all the difference.",
-  "Welcome to your practice. The door is open now. Walk through it again tomorrow.",
+  "第一次练习完成了。这条路始于足下，不在于终点。",
+  "第一天。你不是只想了想，你做到了。这就是一切的区别。",
+  "欢迎开始你的练习。门已经打开了。明天，再走进来。",
 ];
 
 const STREAK_3_MESSAGES = [
-  "Three days in a row. A pattern is forming. Your mind is starting to expect this — that's the habit taking root.",
-  "Day three. The first two days were willpower. Today is the beginning of momentum.",
+  "连续三天。一个模式正在形成。你的心智开始期待这一刻——习惯正在扎根。",
+  "第三天。前两次靠的是意志力。今天，是势头的开始。",
 ];
 
 const STREAK_7_MESSAGES = [
-  "Seven days. A full week of showing up for yourself. Most people never make it this far. You did.",
-  "One week of daily practice. Your brain is literally rewiring. Neuroplasticity isn't a metaphor — it's what's happening right now.",
+  "七天。一整周都在为自己出现。大多数人从未走到这么远。你做到了。",
+  "一周的每日练习。你的大脑正在实实在在地重塑。神经可塑性不是比喻——它正在发生。",
 ];
 
 const STREAK_14_MESSAGES = [
-  "Two weeks. Research says it takes 21 days to form a habit — you're two-thirds there, and it already feels different, doesn't it?",
-  "Fourteen consecutive days. You're not 'trying to meditate' anymore. You're someone who practices. The identity has shifted.",
+  "两周。研究表明形成习惯需要21天——你已经走了三分之二，感觉已经不一样了，不是吗？",
+  "连续十四天。你不再在「尝试冥想」。你是一个在练习的人。身份已经转变。",
 ];
 
 const STREAK_30_MESSAGES = [
-  "Thirty days. A month of daily practice. Whatever you were before you started — anxious, scattered, reactive — you're becoming someone else now. Someone who can watch their own mind and choose.",
-  "One month. This isn't a streak anymore. It's a practice. It's part of who you are. The question is no longer 'will I practice today?' but 'when?'",
+  "三十天。一个月的每日练习。无论你开始前是什么样子——焦虑、散乱、反应——你正在变成另一个人。一个能观察自己的心并做出选择的人。",
+  "一个月。这不再是一个连续记录。这是一项练习。它是你的一部分。问题不再是「我今天要不要练习？」，而是「什么时候？」",
 ];
 
 const STAGE_UP_MESSAGES: Record<number, string[]> = {
   1: [
-    "You've reached the Foundation stage. The basics are in place. Now we build depth — longer sessions, subtler awareness.",
-    "Stage up: Foundation. You've moved from trying to training. The practice is becoming familiar territory.",
+    "你已经进入基础阶段。基本功已经到位。现在开始深入——更长的练习，更细微的觉察。",
+    "阶段提升：基础。你从尝试进入了训练。练习正在成为熟悉的领域。",
   ],
   2: [
-    "Growing stage reached. Your consistency is solid and your awareness is sharpening. This is where practice starts to change how you move through the world.",
-    "Stage up: Growing. You're past the awkward beginner phase. Your sessions have texture and depth now.",
+    "成长阶段已到。你的坚持是稳固的，你的觉知正在敏锐。这就是练习开始改变你如何在这个世界上行走的地方。",
+    "阶段提升：成长。你度过了笨拙的初学者阶段。你的练习现在有了质感和深度。",
   ],
   3: [
-    "Established. Fifteen sessions and strong consistency. Your inner world is becoming legible to you. This is emotional literacy in action.",
-    "Stage up: Established. Your practice has roots. What started as a daily exercise is becoming a way of being.",
+    "稳固阶段。十五次练习和强劲的坚持度。你的内心世界正在变得清晰可读。这就是情绪素养在行动。",
+    "阶段提升：稳固。你的练习扎下了根。从每天的练习开始，逐渐成为一种存在方式。",
   ],
   4: [
-    "Advanced. This is rare territory. Most people never develop this level of inner awareness. Your practice now informs everything you do.",
-    "Stage up: Advanced. You're not just practicing awareness — you're living it. The boundary between 'practice' and 'life' is dissolving.",
+    "进阶。这是稀有的领域。大多数人从未发展出这个层次的内心觉知。你的练习现在渗透到你做的每一件事中。",
+    "阶段提升：进阶。你不只是在练习觉知——你在活出它。「练习」和「生活」之间的界限正在消融。",
   ],
 };
 
 const GENERIC_COMPLETION_MESSAGES = [
-  "Done. You showed up, you practiced, you reflected. That's the whole game — and you're playing it.",
-  "Practice complete. Notice how you feel right now compared to before. That shift is the point.",
-  "Another session in the books. Not every practice will feel profound — but every practice counts.",
-  "You did the work today. Not tomorrow, not 'when things calm down' — today. That's discipline, and discipline is self-love.",
-  "Session finished. Your future self — the one with more clarity, more calm, more choice — thanks you.",
+  "完成。你出现了，你练习了，你反思了。这就是全部——而你在做着。",
+  "练习完成。留意你现在的感受和之前的区别。那个转变就是意义所在。",
+  "又一次练习记录在册。不是每一次练习都会感觉深刻——但每一次练习都很重要。",
+  "你今天完成了功课。不是明天，不是「等事情平静下来的时候」——是今天。这就是自律，自律就是自爱。",
+  "练习结束。你未来的自己——那个更清晰、更平静、更有选择权的自己——在感谢你。",
 ];
 
 // ---------------------------------------------------------------------------