refactor: Rename csv_import to data_import and update foreign key references

- Changed feature ID from 'csv_import' to 'data_import' in the features table.
- Updated foreign key references in tier_limits, user_feature_restrictions, user_feature_usage, and widget_feature_requirements.
- Removed the old 'csv_import' feature entry after ensuring all references are updated.
- Simplified the migration process by using an INSERT with ON CONFLICT for the new feature entry.

backend/migrations/v9c_cleanup_features.sql

@@ -12,30 +12,48 @@
 -- ============================================================================
 
 -- ============================================================================
--- 1. Rename csv_import to data_import
+-- 1. csv_import → data_import (FK-sicher)
 -- ============================================================================
-UPDATE features
-SET
-    id = 'data_import',
-    name = 'Daten importieren',
-    description = 'CSV-Import (FDDB, Apple Health) + ZIP-Backup-Import'
-WHERE id = 'csv_import';
+-- Zuerst Ziel-Feature-Zeile sichern, dann alle FKs umhängen, dann csv_import
+-- entfernen. PK direkt per UPDATE ändern scheitert, solange tier_limits noch
+-- feature_id = 'csv_import' referenziert (tier_limits_feature_id_fkey).
+
+INSERT INTO features (id, name, description, category, limit_type, reset_period, default_limit, active)
+VALUES ('data_import', 'Daten importieren', 'CSV-Import (FDDB, Apple Health) + ZIP-Backup-Import', 'import', 'count', 'monthly', 0, true)
+ON CONFLICT (id) DO UPDATE SET
+    name = EXCLUDED.name,
+    description = EXCLUDED.description,
+    category = EXCLUDED.category,
+    limit_type = EXCLUDED.limit_type,
+    reset_period = EXCLUDED.reset_period;
 
--- Update tier_limits references
 UPDATE tier_limits
 SET feature_id = 'data_import'
 WHERE feature_id = 'csv_import';
 
--- Update user_feature_restrictions references
 UPDATE user_feature_restrictions
 SET feature_id = 'data_import'
 WHERE feature_id = 'csv_import';
 
--- Update user_feature_usage references
 UPDATE user_feature_usage
 SET feature_id = 'data_import'
 WHERE feature_id = 'csv_import';
 
+-- Widget-Gateway (Migration 041): sonst blockiert FK beim Löschen von csv_import
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1 FROM information_schema.tables
+        WHERE table_schema = 'public' AND table_name = 'widget_feature_requirements'
+    ) THEN
+        UPDATE widget_feature_requirements
+        SET feature_id = 'data_import'
+        WHERE feature_id = 'csv_import';
+    END IF;
+END $$;
+
+DELETE FROM features WHERE id = 'csv_import';
+
 -- ============================================================================
 -- 2. Remove old export_csv/json/zip features
 -- ============================================================================
@@ -69,16 +87,8 @@ ON CONFLICT (id) DO UPDATE SET
     reset_period = EXCLUDED.reset_period;
 
 -- ============================================================================
--- 4. Ensure data_import exists and is properly configured
+-- 4. data_import: in Schritt 1 angelegt; kein zweites INSERT nötig
 -- ============================================================================
-INSERT INTO features (id, name, description, category, limit_type, reset_period, default_limit, active)
-VALUES ('data_import', 'Daten importieren', 'CSV-Import (FDDB, Apple Health) + ZIP-Backup-Import', 'import', 'count', 'monthly', 0, true)
-ON CONFLICT (id) DO UPDATE SET
-    name = EXCLUDED.name,
-    description = EXCLUDED.description,
-    category = EXCLUDED.category,
-    limit_type = EXCLUDED.limit_type,
-    reset_period = EXCLUDED.reset_period;
 
 -- ============================================================================
 -- 5. Update tier_limits for data_export (consolidate from old features)