Add multi-image support for task completions and documents

- Add TaskCompletionImage and DocumentImage models with one-to-many relationships
- Update admin panel to display images for completions and documents
- Add image arrays to API request/response DTOs
- Update repositories with Preload("Images") for eager loading
- Fix seed SQL execution to use raw SQL instead of prepared statements
- Fix table names in seed file (admin_users, push_notifications_*)
- Add comprehensive seed test data with 34 completion images and 24 document images
- Add subscription limitations admin feature with toggle
- Update admin sidebar with limitations link

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/models/task.go

@@ -143,7 +143,10 @@ type TaskCompletion struct {
 	CompletedAt   time.Time        `gorm:"column:completed_at;not null" json:"completed_at"`
 	Notes         string           `gorm:"column:notes;type:text" json:"notes"`
 	ActualCost    *decimal.Decimal `gorm:"column:actual_cost;type:decimal(10,2)" json:"actual_cost"`
-	PhotoURL      string           `gorm:"column:photo_url;size:500" json:"photo_url"`
+	Rating        *int             `gorm:"column:rating" json:"rating"` // 1-5 star rating
+
+	// Multiple images support
+	Images        []TaskCompletionImage `gorm:"foreignKey:CompletionID" json:"images,omitempty"`
 }
 
 // TableName returns the table name for GORM
@@ -151,6 +154,19 @@ func (TaskCompletion) TableName() string {
 	return "task_taskcompletion"
 }
 
+// TaskCompletionImage represents the task_taskcompletionimage table
+type TaskCompletionImage struct {
+	BaseModel
+	CompletionID uint   `gorm:"column:completion_id;index;not null" json:"completion_id"`
+	ImageURL     string `gorm:"column:image_url;size:500;not null" json:"image_url"`
+	Caption      string `gorm:"column:caption;size:255" json:"caption"`
+}
+
+// TableName returns the table name for GORM
+func (TaskCompletionImage) TableName() string {
+	return "task_taskcompletionimage"
+}
+
 // KanbanColumn represents a column in the kanban board
 type KanbanColumn struct {
 	Name        string            `json:"name"`