refactor: 标准化项目结构 frontend/ + backend/ + SQLite + run.sh

- 目录重构: app/ -> frontend/，与 backend/ 并列
- 数据库: 默认 SQLite（零配置），修复 DSN() bug
- run.sh: 一键启动前后端，支持 start/stop/restart/status
- Makefile: install/dev/build/lint/clean 快捷命令
- vite.config.ts: 配置 dev server 端口 5173 + API 代理到 8080
- config.yaml: SQLite 默认配置，开箱即用
- docs/: 完整开发文档（项目结构/API/数据库/规范/部署）
- 修复: GORM foreign key 关联声明
- 修复: go get gorm.io/driver/sqlite 依赖

backend/go.mod

@@ -10,7 +10,8 @@ require (
 	golang.org/x/crypto v0.18.0
 	gorm.io/driver/mysql v1.5.2
 	gorm.io/driver/postgres v1.5.4
-	gorm.io/gorm v1.25.5
+	gorm.io/driver/sqlite v1.6.0
+	gorm.io/gorm v1.30.0
 )
 
 require (
@@ -35,6 +36,7 @@ require (
 	github.com/leodido/go-urn v1.2.4 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/mattn/go-sqlite3 v1.14.22 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
@@ -53,7 +55,7 @@ require (
 	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
 	golang.org/x/net v0.19.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/text v0.20.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

backend/go.sum

@@ -64,6 +64,8 @@ github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0V
 github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
+github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -128,8 +130,8 @@ golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
 golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.20.0 h1:gK/Kv2otX8gz+wn7Rmb3vT96ZwuoxnQlY+HlJVj7Qug=
+golang.org/x/text v0.20.0/go.mod h1:D4IsuqiFMhST5bX19pQ9ikHC2GsaKyk/oF+pn3ducp4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
@@ -146,7 +148,9 @@ gorm.io/driver/mysql v1.5.2 h1:QC2HRskSE75wBuOxe0+iCkyJZ+RqpudsQtqkp+IMuXs=
 gorm.io/driver/mysql v1.5.2/go.mod h1:pQLhh1Ut/WUAySdTHwBpBv6+JKcj+ua4ZFx1QQTBzb8=
 gorm.io/driver/postgres v1.5.4 h1:Iyrp9Meh3GmbSuyIAGyjkN+n9K+GHX9b9MqsTL4EJCo=
 gorm.io/driver/postgres v1.5.4/go.mod h1:Bgo89+h0CRcdA33Y6frlaHHVuTdOf87pmyzwW9C/BH0=
+gorm.io/driver/sqlite v1.6.0 h1:WHRRrIiulaPiPFmDcod6prc4l2VGVWHz80KspNsxSfQ=
+gorm.io/driver/sqlite v1.6.0/go.mod h1:AO9V1qIQddBESngQUKWL9yoH93HIeA1X6V633rBwyT8=
 gorm.io/gorm v1.25.2-0.20230530020048-26663ab9bf55/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=
-gorm.io/gorm v1.25.5 h1:zR9lOiiYf09VNh5Q1gphfyia1JpiClIWG9hQaxB/mls=
-gorm.io/gorm v1.25.5/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
+gorm.io/gorm v1.30.0 h1:qbT5aPv1UH8gI99OsRlvDToLxW5zR7FzS9acZDOZcgs=
+gorm.io/gorm v1.30.0/go.mod h1:8Z33v652h4//uMA76KjeDH8mJXPm1QNCYrMeatR0DOE=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

backend/internal/config/config.go

@@ -1,6 +1,8 @@
 package config
 
 import (
+	"fmt"
+
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
 )
@@ -60,7 +62,8 @@ func Load() *Config {
 	viper.SetDefault("mode", "development")
 	viper.SetDefault("port", "8080")
 	viper.SetDefault("log_level", "info")
-	viper.SetDefault("database.driver", "mysql")
+	viper.SetDefault("database.driver", "sqlite")
+	viper.SetDefault("database.dbname", "data/aiops.db")
 	viper.SetDefault("database.host", "localhost")
 	viper.SetDefault("database.port", 3306)
 	viper.SetDefault("database.charset", "utf8mb4")
@@ -90,7 +93,11 @@ func Load() *Config {
 // DSN 返回数据库连接字符串
 func (d *DatabaseConfig) DSN() string {
 	if d.Driver == "mysql" {
-		return d.User + ":" + d.Password + "@tcp(" + d.Host + ":" + string(rune(d.Port)) + ")/" + d.DBName + "?charset=" + d.Charset + "&parseTime=True&loc=Local"
+		return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=%s&parseTime=True&loc=Local",
+			d.User, d.Password, d.Host, d.Port, d.DBName, d.Charset)
+	}
+	if d.Driver == "sqlite" {
+		return d.DBName
 	}
 	return ""
 }

backend/internal/models/approval.go

@@ -44,9 +44,9 @@ type ApprovalProcess struct {
 	DeletedAt  gorm.DeletedAt `gorm:"index" json:"-"`
 
 	// 关联
-	Template *ApprovalTemplate `json:"template,omitempty"`
-	ApplicantUser *User        `json:"applicant_user,omitempty"`
-	Steps    []ApprovalStep    `json:"steps,omitempty"`
+	Template      *ApprovalTemplate `gorm:"foreignKey:TemplateID" json:"template,omitempty"`
+	ApplicantUser *User             `gorm:"foreignKey:Applicant" json:"applicant_user,omitempty"`
+	Steps         []ApprovalStep    `gorm:"foreignKey:ProcessID" json:"steps,omitempty"`
 }
 
 // TableName 表名
@@ -67,7 +67,7 @@ type ApprovalStep struct {
 	UpdatedAt time.Time      `json:"updated_at"`
 
 	// 关联
-	ApproverUser *User `json:"approver_user,omitempty"`
+	ApproverUser *User `gorm:"foreignKey:Approver" json:"approver_user,omitempty"`
 }
 
 // TableName 表名

backend/pkg/database/database.go

@@ -9,6 +9,7 @@ import (
 
 	"gorm.io/driver/mysql"
 	"gorm.io/driver/postgres"
+	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
 )
@@ -26,6 +27,8 @@ func New(cfg config.DatabaseConfig) (*gorm.DB, error) {
 		dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
 			cfg.Host, cfg.Port, cfg.User, cfg.Password, cfg.DBName)
 		dialector = postgres.Open(dsn)
+	case "sqlite":
+		dialector = sqlite.Open(cfg.DBName)
 	default:
 		return nil, fmt.Errorf("unsupported database driver: %s", cfg.Driver)
 	}