Add filtering support to GET /api/v1/habits endpoint

Implemented comprehensive filtering capabilities for the habits list endpoint:
- Filter by type (BOOLEAN, COUNTER, VALUE)
- Filter by frequency (DAILY, WEEKLY, MONTHLY)
- Filter by archived status
- Text search in habit name and description
- All filters can be combined
- Filters work with pagination

Technical changes:
- Added FilterParams to GetUserHabitsQuery
- Created HabitFilter struct in repository interface
- Implemented dynamic SQL query building in SQLite repository
- Updated HTTP handler to parse filter query parameters
- Added comprehensive tests for repository and handler filtering
- Updated all test mocks with new filter methods

internal/application/queries/get_user_habits.go

@@ -20,9 +20,17 @@ type HabitDTO struct {
 	SpecificDays []int
 }
 
+type FilterParams struct {
+	Type            *value_objects.HabitType
+	Frequency       *value_objects.Frequency
+	IncludeArchived bool
+	Search          string
+}
+
 type GetUserHabitsQuery struct {
 	UserID           string
 	PaginationParams *pagination.Params
+	FilterParams     *FilterParams
 }
 
 type GetUserHabitsResult struct {
@@ -45,7 +53,29 @@ func (h *GetUserHabitsHandler) Handle(ctx context.Context, query GetUserHabitsQu
 	var paginationResponse *pagination.Response
 	var err error
 
-	if query.PaginationParams != nil {
+	if query.FilterParams != nil {
+		filter := repositories.HabitFilter{
+			Type:            query.FilterParams.Type,
+			Frequency:       query.FilterParams.Frequency,
+			IncludeArchived: query.FilterParams.IncludeArchived,
+			Search:          query.FilterParams.Search,
+		}
+
+		habits, err = h.habitRepo.FindByUserIDFiltered(ctx, query.UserID, filter, query.PaginationParams)
+		if err != nil {
+			return nil, err
+		}
+
+		if query.PaginationParams != nil {
+			totalItems, err := h.habitRepo.CountByUserIDFiltered(ctx, query.UserID, filter)
+			if err != nil {
+				return nil, err
+			}
+
+			response := pagination.NewResponse(*query.PaginationParams, totalItems)
+			paginationResponse = &response
+		}
+	} else if query.PaginationParams != nil {
 		habits, err = h.habitRepo.FindActiveByUserIDWithPagination(ctx, query.UserID, *query.PaginationParams)
 		if err != nil {
 			return nil, err