feat: add tenant and user management with migrations, handlers, and tests

- Implemented tenant and user management features including:
  - Tenant creation and management with associated migrations.
  - User creation and management with associated migrations.
  - Tenant membership management with associated migrations.
  - Platform user roles management with associated migrations.
  - Quota management with associated migrations.
  - Article and template management with associated migrations.
- Added HTTP handlers for templates and workspaces.
- Created tests for protected and public routes.
- Introduced a script to check tenant scope in SQL queries.
- Documented task plan for backend completion and frontend foundation.

server/internal/tenant/domain/article.go

@@ -0,0 +1,15 @@
+package domain
+
+import "time"
+
+type Article struct {
+	ID               int64
+	TenantID         int64
+	SourceType       string
+	TemplateID       *int64
+	CurrentVersionID *int64
+	GenerateStatus   string
+	PublishStatus    string
+	CreatedAt        time.Time
+	UpdatedAt        time.Time
+}

server/internal/tenant/domain/article_template.go

@@ -0,0 +1,21 @@
+package domain
+
+import "time"
+
+type ArticleTemplate struct {
+	ID                      int64
+	Scope                   string
+	TenantID                *int64
+	OriginType              string
+	TemplateKey             string
+	TemplateName            string
+	SchemaJSON              map[string]interface{}
+	PromptTemplate          *string
+	PromptVisibility        string
+	ProtectedPromptAssetKey *string
+	CardConfigJSON          map[string]interface{}
+	Status                  string
+	VersionNo               int
+	CreatedAt               time.Time
+	UpdatedAt               time.Time
+}

server/internal/tenant/domain/article_version.go

@@ -0,0 +1,15 @@
+package domain
+
+import "time"
+
+type ArticleVersion struct {
+	ID              int64
+	ArticleID       int64
+	VersionNo       int
+	Title           *string
+	HTMLContent     *string
+	MarkdownContent *string
+	WordCount       int
+	SourceLabel     *string
+	CreatedAt       time.Time
+}

server/internal/tenant/domain/brand.go

@@ -0,0 +1,13 @@
+package domain
+
+import "time"
+
+type Brand struct {
+	ID          int64
+	TenantID    int64
+	Name        string
+	Description *string
+	Status      string
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+}

server/internal/tenant/domain/brand_keyword.go

@@ -0,0 +1,13 @@
+package domain
+
+import "time"
+
+type BrandKeyword struct {
+	ID        int64
+	TenantID  int64
+	BrandID   int64
+	Name      string
+	Status    string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}

server/internal/tenant/domain/brand_question.go

@@ -0,0 +1,23 @@
+package domain
+
+import "time"
+
+type BrandQuestion struct {
+	ID               int64
+	TenantID         int64
+	BrandID          int64
+	KeywordID        int64
+	CurrentVersionID *int64
+	Status           string
+	CreatedAt        time.Time
+}
+
+type BrandQuestionVersion struct {
+	ID           int64
+	QuestionID   int64
+	QuestionText string
+	QuestionHash string
+	VersionNo    int
+	IsActive     bool
+	CreatedAt    time.Time
+}

server/internal/tenant/domain/competitor.go

@@ -0,0 +1,18 @@
+package domain
+
+import (
+	"encoding/json"
+	"time"
+)
+
+type Competitor struct {
+	ID               int64
+	TenantID         int64
+	BrandID          int64
+	Name             string
+	Website          *string
+	Description      *string
+	ProductLinesJSON json.RawMessage
+	CreatedAt        time.Time
+	UpdatedAt        time.Time
+}

server/internal/tenant/domain/generation_task.go

@@ -0,0 +1,19 @@
+package domain
+
+import "time"
+
+type GenerationTask struct {
+	ID                 int64
+	TenantID           int64
+	ArticleID          *int64
+	TaskBatchID        *string
+	QuotaReservationID *int64
+	TaskType           string
+	RequestHash        *string
+	InputParamsJSON    map[string]interface{}
+	Status             string
+	ErrorMessage       *string
+	StartedAt          *time.Time
+	CompletedAt        *time.Time
+	CreatedAt          time.Time
+}

server/internal/tenant/domain/tenant.go

@@ -0,0 +1,20 @@
+package domain
+
+import "time"
+
+type Tenant struct {
+	ID        int64
+	Name      string
+	Status    string
+	FrozenAt  *time.Time
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+type TenantMembership struct {
+	ID         int64
+	TenantID   int64
+	UserID     int64
+	TenantRole string
+	CreatedAt  time.Time
+}

server/internal/tenant/domain/user.go

@@ -0,0 +1,15 @@
+package domain
+
+import "time"
+
+type User struct {
+	ID           int64
+	Email        string
+	Phone        *string
+	PasswordHash string
+	Name         string
+	AvatarURL    *string
+	Status       string
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}

server/internal/tenant/domain/workspace.go

@@ -0,0 +1,31 @@
+package domain
+
+import "time"
+
+type WorkspaceOverview struct {
+	ArticleCount           int64 `json:"article_count"`
+	PublishedCount         int64 `json:"published_count"`
+	BrandCount             int64 `json:"brand_count"`
+	SupportedPlatformCount int   `json:"supported_platform_count"`
+}
+
+type RecentArticle struct {
+	ID             int64     `json:"id"`
+	Title          *string   `json:"title"`
+	TemplateName   *string   `json:"template_name"`
+	GenerateStatus string    `json:"generate_status"`
+	PublishStatus  string    `json:"publish_status"`
+	SourceType     string    `json:"source_type"`
+	WordCount      int       `json:"word_count"`
+	SourceLabel    *string   `json:"source_label"`
+	CreatedAt      time.Time `json:"created_at"`
+}
+
+type QuotaSummary struct {
+	PlanCode   string     `json:"plan_code"`
+	PlanName   string     `json:"plan_name"`
+	TotalQuota int        `json:"total_quota"`
+	UsedQuota  int        `json:"used_quota"`
+	Balance    int        `json:"balance"`
+	ResetAt    *time.Time `json:"reset_at"`
+}