feat: 实现后端和管理后台基础架构

## 后端架构 (Go + Gin + GORM)
- ✅ 完整的分层架构 (API/Service/Repository)
- ✅ PostgreSQL数据库设计和迁移脚本
- ✅ JWT认证系统和权限控制
- ✅ 用户、照片、分类、标签等核心模型
- ✅ 中间件系统 (认证、CORS、日志)
- ✅ 配置管理和环境变量支持
- ✅ 结构化日志和错误处理
- ✅ Makefile构建和部署脚本

## 管理后台架构 (React + TypeScript)
- ✅ Vite + React 18 + TypeScript现代化架构
- ✅ 路由系统和状态管理 (Zustand + TanStack Query)
- ✅ 基于Radix UI的组件库基础
- ✅ 认证流程和权限控制
- ✅ 响应式设计和主题系统

## 数据库设计
- ✅ 用户表 (角色权限、认证信息)
- ✅ 照片表 (元数据、EXIF、状态管理)
- ✅ 分类表 (层级结构、封面图片)
- ✅ 标签表 (使用统计、标签云)
- ✅ 关联表 (照片-标签多对多)

## 技术特点
- 🚀 高性能: Gin框架 + GORM ORM
- 🔐 安全: JWT认证 + 密码加密 + 权限控制
- 📊 监控: 结构化日志 + 健康检查
- 🎨 现代化: React 18 + TypeScript + Vite
- 📱 响应式: Tailwind CSS + Radix UI

参考文档: docs/development/saved-docs/

backend/migrations/001_create_users.sql

@@ -0,0 +1,30 @@
+-- +migrate Up
+
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    email VARCHAR(100) UNIQUE NOT NULL,
+    password VARCHAR(255) NOT NULL,
+    name VARCHAR(100),
+    avatar VARCHAR(500),
+    role VARCHAR(20) DEFAULT 'user',
+    is_active BOOLEAN DEFAULT true,
+    last_login TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP
+);
+
+-- 创建索引
+CREATE INDEX idx_users_username ON users(username);
+CREATE INDEX idx_users_email ON users(email);
+CREATE INDEX idx_users_role ON users(role);
+CREATE INDEX idx_users_deleted_at ON users(deleted_at);
+
+-- 插入默认管理员用户 (密码: admin123)
+INSERT INTO users (username, email, password, name, role) VALUES 
+('admin', 'admin@photography.com', '$2a$10$D4Zz6m3j1YJzp8Y7zW4l2OXcQ5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0', '管理员', 'admin');
+
+-- +migrate Down
+
+DROP TABLE IF EXISTS users;

backend/migrations/002_create_categories.sql

@@ -0,0 +1,33 @@
+-- +migrate Up
+
+CREATE TABLE categories (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(100) NOT NULL,
+    description TEXT,
+    parent_id INTEGER REFERENCES categories(id),
+    color VARCHAR(7) DEFAULT '#3b82f6',
+    cover_image VARCHAR(500),
+    sort INTEGER DEFAULT 0,
+    is_active BOOLEAN DEFAULT true,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP
+);
+
+-- 创建索引
+CREATE INDEX idx_categories_parent_id ON categories(parent_id);
+CREATE INDEX idx_categories_is_active ON categories(is_active);
+CREATE INDEX idx_categories_sort ON categories(sort);
+CREATE INDEX idx_categories_deleted_at ON categories(deleted_at);
+
+-- 插入默认分类
+INSERT INTO categories (name, description, color, sort) VALUES 
+('风景摄影', '自然风景摄影作品', '#10b981', 1),
+('人像摄影', '人物肖像摄影作品', '#f59e0b', 2),
+('街头摄影', '街头纪实摄影作品', '#ef4444', 3),
+('建筑摄影', '建筑和城市摄影作品', '#3b82f6', 4),
+('抽象摄影', '抽象艺术摄影作品', '#8b5cf6', 5);
+
+-- +migrate Down
+
+DROP TABLE IF EXISTS categories;

backend/migrations/003_create_tags.sql

@@ -0,0 +1,35 @@
+-- +migrate Up
+
+CREATE TABLE tags (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(50) UNIQUE NOT NULL,
+    color VARCHAR(7) DEFAULT '#6b7280',
+    use_count INTEGER DEFAULT 0,
+    is_active BOOLEAN DEFAULT true,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP
+);
+
+-- 创建索引
+CREATE INDEX idx_tags_name ON tags(name);
+CREATE INDEX idx_tags_use_count ON tags(use_count);
+CREATE INDEX idx_tags_is_active ON tags(is_active);
+CREATE INDEX idx_tags_deleted_at ON tags(deleted_at);
+
+-- 插入默认标签
+INSERT INTO tags (name, color) VALUES 
+('自然', '#10b981'),
+('人物', '#f59e0b'),
+('城市', '#3b82f6'),
+('夜景', '#1f2937'),
+('黑白', '#6b7280'),
+('色彩', '#ec4899'),
+('构图', '#8b5cf6'),
+('光影', '#f97316'),
+('街头', '#ef4444'),
+('建筑', '#0891b2');
+
+-- +migrate Down
+
+DROP TABLE IF EXISTS tags;

backend/migrations/004_create_photos.sql

@@ -0,0 +1,55 @@
+-- +migrate Up
+
+CREATE TABLE photos (
+    id SERIAL PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    description TEXT,
+    filename VARCHAR(255) NOT NULL,
+    file_path VARCHAR(500) NOT NULL,
+    file_size BIGINT,
+    mime_type VARCHAR(100),
+    width INTEGER,
+    height INTEGER,
+    category_id INTEGER REFERENCES categories(id),
+    exif JSONB,
+    taken_at TIMESTAMP,
+    location VARCHAR(255),
+    is_public BOOLEAN DEFAULT true,
+    status VARCHAR(20) DEFAULT 'draft',
+    view_count INTEGER DEFAULT 0,
+    like_count INTEGER DEFAULT 0,
+    user_id INTEGER NOT NULL REFERENCES users(id),
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP
+);
+
+-- 创建照片标签关联表
+CREATE TABLE photo_tags (
+    photo_id INTEGER REFERENCES photos(id) ON DELETE CASCADE,
+    tag_id INTEGER REFERENCES tags(id) ON DELETE CASCADE,
+    PRIMARY KEY (photo_id, tag_id)
+);
+
+-- 创建索引
+CREATE INDEX idx_photos_category_id ON photos(category_id);
+CREATE INDEX idx_photos_user_id ON photos(user_id);
+CREATE INDEX idx_photos_status ON photos(status);
+CREATE INDEX idx_photos_is_public ON photos(is_public);
+CREATE INDEX idx_photos_taken_at ON photos(taken_at);
+CREATE INDEX idx_photos_created_at ON photos(created_at);
+CREATE INDEX idx_photos_view_count ON photos(view_count);
+CREATE INDEX idx_photos_like_count ON photos(like_count);
+CREATE INDEX idx_photos_deleted_at ON photos(deleted_at);
+
+-- 为JSONB字段创建GIN索引（支持高效的JSON查询）
+CREATE INDEX idx_photos_exif_gin ON photos USING GIN (exif);
+
+-- 全文搜索索引
+CREATE INDEX idx_photos_title_gin ON photos USING GIN (to_tsvector('english', title));
+CREATE INDEX idx_photos_description_gin ON photos USING GIN (to_tsvector('english', description));
+
+-- +migrate Down
+
+DROP TABLE IF EXISTS photo_tags;
+DROP TABLE IF EXISTS photos;