feat: 系统配置 + 用户签名

- 新增 sys_config 表，存储应用版本号、标语、描述
- 关于小菜弹窗版本号改为从数据库动态获取
- 用户表新增 slogan 字段（个性签名）
- 编辑资料页面支持修改签名
- 管理后台新增系统配置管理页面
- 更新 CLAUDE.md 文档

server/src/db/init.ts

@@ -165,6 +165,56 @@ async function runMigrations(conn: mysql.Connection) {
       ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
     `)
   }
+
+  // users 表添加 slogan（个性签名）
+  const hasSlogan = await columnExists(conn, 'users', 'slogan')
+  if (!hasSlogan) {
+    console.log('[DB] Migrating: adding slogan to users')
+    await conn.query("ALTER TABLE users ADD COLUMN slogan VARCHAR(100) DEFAULT '记账小能手' COMMENT '个性签名' AFTER avatar_url")
+  }
+
+  // 系统配置表
+  const hasSysConfig = await tableExists(conn, 'sys_config')
+  if (!hasSysConfig) {
+    console.log('[DB] Migrating: creating sys_config table')
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS sys_config (
+        config_key VARCHAR(50) PRIMARY KEY COMMENT '配置键',
+        config_value TEXT NOT NULL COMMENT '配置值',
+        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+    // 插入默认配置
+    await conn.query(`
+      INSERT IGNORE INTO sys_config (config_key, config_value) VALUES
+      ('app_version', '1.0.0'),
+      ('app_slogan', '温暖 x 轻松的个人记账小程序'),
+      ('app_description', '让记账从负担变成享受')
+    `)
+  }
+
+  // 反馈表
+  const hasFeedbacks = await tableExists(conn, 'feedbacks')
+  if (!hasFeedbacks) {
+    console.log('[DB] Migrating: creating feedbacks table')
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS feedbacks (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        user_id INT NOT NULL,
+        type ENUM('bug', 'feature', 'ux', 'other') NOT NULL DEFAULT 'other' COMMENT '反馈类型',
+        content TEXT NOT NULL COMMENT '反馈内容',
+        contact VARCHAR(100) DEFAULT '' COMMENT '联系方式',
+        status ENUM('pending', 'processed', 'ignored') DEFAULT 'pending' COMMENT '处理状态',
+        admin_reply TEXT DEFAULT '' COMMENT '管理员回复',
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+        INDEX idx_user (user_id),
+        INDEX idx_status (status),
+        INDEX idx_created (created_at),
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+  }
 }
 
 export async function initDatabase() {

server/src/db/schema.sql

@@ -4,6 +4,7 @@ CREATE TABLE IF NOT EXISTS users (
   session_key VARCHAR(100),
   nickname VARCHAR(50) DEFAULT '小菜' COMMENT '用户昵称',
   avatar_url VARCHAR(500) DEFAULT '' COMMENT '头像URL',
+  slogan VARCHAR(100) DEFAULT '记账小能手' COMMENT '个性签名',
   role ENUM('user', 'admin') DEFAULT 'user' COMMENT '角色',
   created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
@@ -130,3 +131,9 @@ CREATE TABLE IF NOT EXISTS feedbacks (
   INDEX idx_created (created_at),
   FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS sys_config (
+  config_key VARCHAR(50) PRIMARY KEY COMMENT '配置键',
+  config_value TEXT NOT NULL COMMENT '配置值',
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

server/src/db/seed.sql

@@ -15,3 +15,9 @@ INSERT IGNORE INTO categories (user_id, name, icon, color, type, sort_order) VAL
 (0, '副业', 'TrendingUp', '#7BC67E', 'income', 2),
 (0, '理财', 'PieChart', '#7BC67E', 'income', 3),
 (0, '其他收入', 'Plus', '#BFB3B3', 'income', 4);
+
+-- 系统配置
+INSERT IGNORE INTO sys_config (config_key, config_value) VALUES
+('app_version', '1.0.0'),
+('app_slogan', '温暖 x 轻松的个人记账小程序'),
+('app_description', '让记账从负担变成享受');