Replace status_id with in_progress boolean field

- Remove task_statuses lookup table and StatusID foreign key
- Add InProgress boolean field to Task model
- Add database migration (005_replace_status_with_in_progress)
- Update all handlers, services, and repositories
- Update admin frontend to display in_progress as checkbox/boolean
- Remove Task Statuses tab from admin lookups page
- Update tests to use InProgress instead of StatusID
- Task categorization now uses InProgress for kanban column assignment

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

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

internal/testutil/testutil.go

@@ -46,7 +46,6 @@ func SetupTestDB(t *testing.T) *gorm.DB {
 		&models.Task{},
 		&models.TaskCategory{},
 		&models.TaskPriority{},
-		&models.TaskStatus{},
 		&models.TaskFrequency{},
 		&models.TaskCompletion{},
 		&models.TaskCompletionImage{},
@@ -184,17 +183,6 @@ func CreateTestTaskPriority(t *testing.T, db *gorm.DB, name string, level int) *
 	return priority
 }
 
-// CreateTestTaskStatus creates a test task status
-func CreateTestTaskStatus(t *testing.T, db *gorm.DB, name string) *models.TaskStatus {
-	status := &models.TaskStatus{
-		Name:         name,
-		DisplayOrder: 1,
-	}
-	err := db.Create(status).Error
-	require.NoError(t, err)
-	return status
-}
-
 // CreateTestTaskFrequency creates a test task frequency
 func CreateTestTaskFrequency(t *testing.T, db *gorm.DB, name string, days *int) *models.TaskFrequency {
 	freq := &models.TaskFrequency{
@@ -256,17 +244,6 @@ func SeedLookupData(t *testing.T, db *gorm.DB) {
 		db.Create(&p)
 	}
 
-	// Task statuses
-	statuses := []models.TaskStatus{
-		{Name: "Pending", DisplayOrder: 1},
-		{Name: "In Progress", DisplayOrder: 2},
-		{Name: "Completed", DisplayOrder: 3},
-		{Name: "Cancelled", DisplayOrder: 4},
-	}
-	for _, s := range statuses {
-		db.Create(&s)
-	}
-
 	// Task frequencies
 	days7 := 7
 	days30 := 30