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/go.mod

@@ -0,0 +1,55 @@
+module photography-backend
+
+go 1.21
+
+require (
+	github.com/gin-gonic/gin v1.9.1
+	github.com/golang-jwt/jwt/v5 v5.2.0
+	gorm.io/gorm v1.25.5
+	gorm.io/driver/postgres v1.5.4
+	github.com/go-redis/redis/v8 v8.11.5
+	github.com/spf13/viper v1.18.2
+	go.uber.org/zap v1.26.0
+	github.com/stretchr/testify v1.8.4
+	github.com/golang-migrate/migrate/v4 v4.17.0
+	github.com/aws/aws-sdk-go-v2 v1.23.5
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.43.0
+	golang.org/x/crypto v0.17.0
+	golang.org/x/image v0.14.0
+)
+
+require (
+	github.com/bytedance/sonic v1.9.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.14.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
+	github.com/jackc/pgx/v5 v5.5.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.11 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/arch v0.3.0 // indirect
+	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)