Initial commit: Gitea Project Management System

Features:
- Complete project management system with Epic/Story/Task hierarchy
- Vue.js 3 + Element Plus frontend with kanban board
- Go backend with Gin framework and GORM
- OAuth2 integration with Gitea
- Docker containerization with MySQL
- RESTful API for project, task, and user management
- JWT authentication and authorization
- Responsive web interface with dashboard

internal/models/project.go

@@ -0,0 +1,163 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type Project struct {
+	ID          uint             `json:"id" gorm:"primaryKey"`
+	Name        string           `json:"name" gorm:"not null"`
+	Description string           `json:"description"`
+	GiteaOrg    string           `json:"gitea_org"`
+	Status      string           `json:"status" gorm:"default:'planning'"`
+	Priority    string           `json:"priority" gorm:"default:'medium'"`
+	StartDate   *time.Time       `json:"start_date"`
+	EndDate     *time.Time       `json:"end_date"`
+	OwnerID     uint             `json:"owner_id"`
+	Owner       User             `json:"owner" gorm:"foreignKey:OwnerID"`
+	Members     []ProjectMember  `json:"members" gorm:"foreignKey:ProjectID"`
+	Epics       []Epic           `json:"epics" gorm:"foreignKey:ProjectID"`
+	Stories     []Story          `json:"stories" gorm:"foreignKey:ProjectID"`
+	Tasks       []Task           `json:"tasks" gorm:"foreignKey:ProjectID"`
+	Sprints     []Sprint         `json:"sprints" gorm:"foreignKey:ProjectID"`
+	CreatedAt   time.Time        `json:"created_at"`
+	UpdatedAt   time.Time        `json:"updated_at"`
+}
+
+type ProjectMember struct {
+	ID        uint      `json:"id" gorm:"primaryKey"`
+	ProjectID uint      `json:"project_id"`
+	UserID    uint      `json:"user_id"`
+	Role      string    `json:"role" gorm:"default:'developer'"`
+	User      User      `json:"user" gorm:"foreignKey:UserID"`
+	JoinedAt  time.Time `json:"joined_at"`
+}
+
+type ProjectStatus string
+
+const (
+	ProjectStatusActive   ProjectStatus = "active"
+	ProjectStatusArchived ProjectStatus = "archived"
+	ProjectStatusPlanning ProjectStatus = "planning"
+)
+
+type ProjectPriority string
+
+const (
+	PriorityLow      ProjectPriority = "low"
+	PriorityMedium   ProjectPriority = "medium"
+	PriorityHigh     ProjectPriority = "high"
+	PriorityCritical ProjectPriority = "critical"
+)
+
+type ProjectMemberRole string
+
+const (
+	ProjectRoleOwner     ProjectMemberRole = "owner"
+	ProjectRoleManager   ProjectMemberRole = "manager"
+	ProjectRoleDeveloper ProjectMemberRole = "developer"
+	ProjectRoleTester    ProjectMemberRole = "tester"
+	ProjectRoleViewer    ProjectMemberRole = "viewer"
+)
+
+func (p *Project) BeforeCreate(tx *gorm.DB) error {
+	return nil
+}
+
+func (p *Project) GetMembers() ([]User, error) {
+	var users []User
+	err := DB.Joins("JOIN project_members ON users.id = project_members.user_id").
+		Where("project_members.project_id = ?", p.ID).
+		Find(&users).Error
+	return users, err
+}
+
+func (p *Project) AddMember(userID uint, role string) error {
+	member := ProjectMember{
+		ProjectID: p.ID,
+		UserID:    userID,
+		Role:      role,
+		JoinedAt:  time.Now(),
+	}
+	return DB.Create(&member).Error
+}
+
+func (p *Project) RemoveMember(userID uint) error {
+	return DB.Where("project_id = ? AND user_id = ?", p.ID, userID).Delete(&ProjectMember{}).Error
+}
+
+func (p *Project) GetProgress() (float64, error) {
+	var totalTasks int64
+	var completedTasks int64
+
+	err := DB.Model(&Task{}).Where("project_id = ?", p.ID).Count(&totalTasks).Error
+	if err != nil {
+		return 0, err
+	}
+
+	if totalTasks == 0 {
+		return 0, nil
+	}
+
+	err = DB.Model(&Task{}).Where("project_id = ? AND status = 'done'", p.ID).Count(&completedTasks).Error
+	if err != nil {
+		return 0, err
+	}
+
+	return float64(completedTasks) / float64(totalTasks) * 100, nil
+}
+
+func CreateProject(project *Project) error {
+	return DB.Create(project).Error
+}
+
+func GetProjectByID(id uint) (*Project, error) {
+	var project Project
+	err := DB.Preload("Owner").Preload("Members.User").First(&project, id).Error
+	return &project, err
+}
+
+func GetProjectsByUser(userID uint) ([]Project, error) {
+	var projects []Project
+	err := DB.Where("owner_id = ?", userID).
+		Or("id IN (SELECT project_id FROM project_members WHERE user_id = ?)", userID).
+		Preload("Owner").
+		Find(&projects).Error
+	return projects, err
+}
+
+func UpdateProject(project *Project) error {
+	return DB.Save(project).Error
+}
+
+func DeleteProject(id uint) error {
+	return DB.Delete(&Project{}, id).Error
+}
+
+func ListProjects(offset, limit int, filters map[string]interface{}) ([]Project, int64, error) {
+	var projects []Project
+	var total int64
+
+	query := DB.Model(&Project{})
+	
+	for key, value := range filters {
+		switch key {
+		case "status":
+			query = query.Where("status = ?", value)
+		case "priority":
+			query = query.Where("priority = ?", value)
+		case "owner_id":
+			query = query.Where("owner_id = ?", value)
+		}
+	}
+
+	err := query.Count(&total).Error
+	if err != nil {
+		return nil, 0, err
+	}
+
+	err = query.Preload("Owner").Offset(offset).Limit(limit).Find(&projects).Error
+	return projects, total, err
+}