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>

prisma/migrations/20260617062135_add_analytics_and_user_fields/migration.sql

@@ -0,0 +1,111 @@
+-- CreateTable
+CREATE TABLE "users" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "email" TEXT NOT NULL,
+    "password_hash" TEXT,
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- CreateTable
+CREATE TABLE "user_states" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "attention_level" INTEGER NOT NULL DEFAULT 50,
+    "emotion_stability" INTEGER NOT NULL DEFAULT 50,
+    "stress_level" INTEGER NOT NULL DEFAULT 50,
+    "practice_stage" INTEGER NOT NULL DEFAULT 0,
+    "consistency_score" INTEGER NOT NULL DEFAULT 0,
+    "streak_days" INTEGER NOT NULL DEFAULT 0,
+    "total_sessions_completed" INTEGER NOT NULL DEFAULT 0,
+    "onboarding_completed" BOOLEAN NOT NULL DEFAULT false,
+    "onboarding_variant" TEXT,
+    "timezone" TEXT NOT NULL DEFAULT 'Asia/Shanghai',
+    "last_session_date" DATETIME,
+    "updated_at" DATETIME NOT NULL,
+    CONSTRAINT "user_states_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "analytics_events" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "event" TEXT NOT NULL,
+    "metadata" TEXT NOT NULL DEFAULT '{}',
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- CreateTable
+CREATE TABLE "sessions" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "task_type" TEXT NOT NULL,
+    "task_description" TEXT NOT NULL,
+    "duration_seconds" INTEGER NOT NULL DEFAULT 300,
+    "completed" BOOLEAN NOT NULL DEFAULT false,
+    "focus_score" INTEGER,
+    "emotion_score" INTEGER,
+    "notes" TEXT,
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "sessions_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "tasks" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "type" TEXT NOT NULL,
+    "difficulty" INTEGER NOT NULL DEFAULT 1,
+    "duration" INTEGER NOT NULL DEFAULT 5,
+    "description" TEXT NOT NULL,
+    "reason_json" TEXT NOT NULL DEFAULT '{}',
+    "status" TEXT NOT NULL DEFAULT 'pending',
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "tasks_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "reward_events" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "type" TEXT NOT NULL,
+    "message" TEXT NOT NULL,
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "reward_events_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "weekly_summaries" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "summary" TEXT,
+    "week_start" DATETIME NOT NULL,
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "weekly_summaries_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "users_email_key" ON "users"("email");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "user_states_user_id_key" ON "user_states"("user_id");
+
+-- CreateIndex
+CREATE INDEX "analytics_events_user_id_created_at_idx" ON "analytics_events"("user_id", "created_at");
+
+-- CreateIndex
+CREATE INDEX "analytics_events_event_created_at_idx" ON "analytics_events"("event", "created_at");
+
+-- CreateIndex
+CREATE INDEX "sessions_user_id_created_at_idx" ON "sessions"("user_id", "created_at");
+
+-- CreateIndex
+CREATE INDEX "tasks_user_id_created_at_idx" ON "tasks"("user_id", "created_at");
+
+-- CreateIndex
+CREATE INDEX "tasks_user_id_status_idx" ON "tasks"("user_id", "status");
+
+-- CreateIndex
+CREATE INDEX "reward_events_user_id_created_at_idx" ON "reward_events"("user_id", "created_at");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "weekly_summaries_user_id_key" ON "weekly_summaries"("user_id");

prisma/migrations/migration_lock.toml

@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "sqlite"

prisma/schema.prisma

@@ -57,6 +57,8 @@ model UserState {
   streakDays              Int      @default(0) @map("streak_days")
   totalSessionsCompleted  Int      @default(0) @map("total_sessions_completed")
   onboardingCompleted     Boolean  @default(false) @map("onboarding_completed")
+  onboardingVariant       String?  @map("onboarding_variant")
+  timezone                String   @default("Asia/Shanghai")
   lastSessionDate         DateTime? @map("last_session_date")
   updatedAt               DateTime @updatedAt @map("updated_at")
 
@@ -65,6 +67,18 @@ model UserState {
   @@map("user_states")
 }
 
+model AnalyticsEvent {
+  id        String   @id @default(uuid())
+  userId    String   @map("user_id")
+  event     String
+  metadata  String   @default("{}")
+  createdAt DateTime @default(now()) @map("created_at")
+
+  @@index([userId, createdAt])
+  @@index([event, createdAt])
+  @@map("analytics_events")
+}
+
 model Session {
   id              String    @id @default(uuid())
   userId          String    @map("user_id")