refactor: improve code quality across controllers and services

- DRY FurniEditorController: extract duplicate try/catch blocks into handleApiError(),
  formatItemData(), buildUpdateData(), buildInsertData(), castValue() methods
- ProfileController: replace 45 lines of manual date formatting with Carbon's diffForHumans()
- Replace custom Password rule (180 lines) with Laravel's built-in Password::min() rule
- RadioController: extract RadioStreamService and RadioScheduleService, reducing from 608 to 323 lines
- Add RadioSettings enum to replace magic strings throughout radio feature
- Add CurrencyTypes::columnName() helper method
- Add consistent return types (JsonResponse, View, RedirectResponse) to all controller methods

app/Enums/CurrencyTypes.php

@@ -30,6 +30,16 @@ enum CurrencyTypes: int
         };
     }
 
+    public function columnName(): string
+    {
+        return match ($this) {
+            self::Credits => 'credits',
+            self::Duckets => 'duckets',
+            self::Diamonds => 'diamonds',
+            self::Points => 'points',
+        };
+    }
+
     public function getImage(): string
     {
         return match ($this->value) {