feat: 添加SQLite本地数据库支持

- 移除Prisma中不支持SQLite的类型（Json、枚举）
- 使用String类型替代枚举值
- 更新Prisma schema适配SQLite
- 添加数据库初始化脚本scripts/init-db.js
- 更新数据库路径配置
- 添加sql.js依赖
- 删除旧的prisma.ts使用新的db.ts

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

package.json

@@ -1,6 +1,7 @@
 {
   "name": "qia-server",
   "version": "0.1.0",
+  "type": "module",
   "description": "Backend API for 掐日子(qia) app",
   "main": "dist/index.js",
   "scripts": {
@@ -23,6 +24,7 @@
     "express-validator": "^7.1.0",
     "helmet": "^8.0.0",
     "jsonwebtoken": "^9.0.2",
+    "sql.js": "^1.13.0",
     "zod": "^3.23.8"
   },
   "devDependencies": {

prisma/schema.prisma

@@ -31,12 +31,12 @@ model User {
 model Event {
   id           String    @id @default(uuid())
   user_id      String
-  type         EventType // 'anniversary' | 'reminder'
+  type         String    // 'anniversary' | 'reminder' (String for SQLite)
   title        String
   content      String?   // Only for reminders
   date         DateTime  // For anniversaries: the date; For reminders: the reminder date
   is_lunar     Boolean   @default(false)
-  repeat_type  RepeatType @default(none)
+  repeat_type  String     @default("none") // 'yearly' | 'monthly' | 'none' (String for SQLite)
   is_holiday   Boolean   @default(false) // Only for anniversaries
   is_completed Boolean   @default(false) // Only for reminders
   created_at   DateTime  @default(now())
@@ -55,7 +55,7 @@ model Event {
 model Note {
   id        String   @id @default(uuid())
   user_id   String
-  content   String   @db.Text // HTML content from rich text editor
+  content   String   // HTML content from rich text editor
   created_at DateTime @default(now())
   updated_at DateTime @updatedAt
 
@@ -73,7 +73,7 @@ model AICoachConversation {
   user_id     String
   message     String
   response    String
-  parsed_data Json?    // AI parsed event data
+  parsed_data String?    // AI parsed event data (JSON string for SQLite)
   created_at  DateTime @default(now())
 
   // Relations
@@ -83,14 +83,6 @@ model AICoachConversation {
   @@map("ai_coach_conversations")
 }
 
-// Enums
+// Note: Using String types instead of enums for SQLite compatibility
-enum EventType {
+// Event type values: 'anniversary' | 'reminder'
-  anniversary
+// Repeat type values: 'yearly' | 'monthly' | 'none'
-  reminder
-}
-
-enum RepeatType {
-  yearly
-  monthly
-  none
-}

scripts/init-db.js

@@ -0,0 +1,98 @@
+import { createClient } from '@libsql/client';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+// Navigate from scripts/ to server/ root, then to prisma/
+const dbPath = path.join(__dirname, '..', 'prisma', 'dev.db');
+const prismaDir = path.dirname(dbPath);
+
+// Ensure prisma directory exists
+if (!fs.existsSync(prismaDir)) {
+  fs.mkdirSync(prismaDir, { recursive: true });
+  console.log('Created prisma directory');
+}
+
+console.log('Database path:', dbPath);
+
+// Ensure file exists
+if (!fs.existsSync(dbPath)) {
+  fs.writeFileSync(dbPath, '');
+  console.log('Created empty database file');
+}
+
+const db = createClient({
+  url: `file:${dbPath}`,
+});
+
+console.log('LibSQL client created');
+
+// Create tables
+await db.execute(`
+  CREATE TABLE IF NOT EXISTS users (
+    id TEXT PRIMARY KEY,
+    email TEXT UNIQUE NOT NULL,
+    password_hash TEXT NOT NULL,
+    nickname TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+  )
+`);
+console.log('Created users table');
+
+await db.execute(`
+  CREATE TABLE IF NOT EXISTS events (
+    id TEXT PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    type TEXT NOT NULL,
+    title TEXT NOT NULL,
+    content TEXT,
+    date DATETIME NOT NULL,
+    is_lunar INTEGER DEFAULT 0,
+    repeat_type TEXT DEFAULT 'none',
+    is_holiday INTEGER DEFAULT 0,
+    is_completed INTEGER DEFAULT 0,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+  )
+`);
+console.log('Created events table');
+
+await db.execute(`CREATE INDEX IF NOT EXISTS idx_events_user_id ON events(user_id)`);
+await db.execute(`CREATE INDEX IF NOT EXISTS idx_events_type ON events(type)`);
+await db.execute(`CREATE INDEX IF NOT EXISTS idx_events_date ON events(date)`);
+
+await db.execute(`
+  CREATE TABLE IF NOT EXISTS notes (
+    id TEXT PRIMARY KEY,
+    user_id TEXT UNIQUE NOT NULL,
+    content TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+  )
+`);
+console.log('Created notes table');
+
+await db.execute(`
+  CREATE TABLE IF NOT EXISTS ai_coach_conversations (
+    id TEXT PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    message TEXT NOT NULL,
+    response TEXT NOT NULL,
+    parsed_data TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+  )
+`);
+console.log('Created ai_coach_conversations table');
+
+await db.execute(`CREATE INDEX IF NOT EXISTS idx_ai_conversations_user_id ON ai_coach_conversations(user_id)`);
+
+// Verify
+const tables = await db.execute("SELECT name FROM sqlite_master WHERE type='table'");
+console.log('Tables:', tables.rows.map(r => r.name).join(', '));
+
+console.log('\nDatabase initialized successfully!');

src/lib/db.ts

@@ -0,0 +1,20 @@
+import { createClient } from '@libsql/client';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import dotenv from 'dotenv';
+
+// Load .env file
+dotenv.config();
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const dbPath = path.resolve(__dirname, '../../prisma/dev.db');
+
+console.log('Database path:', dbPath);
+
+// Create LibSQL client
+const db = createClient({
+  url: `file:${dbPath}`,
+});
+
+export default db;
+export { dbPath };