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/Services/Community/RadioScheduleService.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace App\Services\Community;
+
+use App\Models\RadioSchedule;
+use App\Models\User;
+use Illuminate\Support\Facades\Cache;
+
+class RadioScheduleService
+{
+    public function getCurrentDJ(?string $manualDjId = null): ?array
+    {
+        if (! empty($manualDjId)) {
+            $dj = Cache::remember("user_{$manualDjId}", 60, fn () => User::find($manualDjId));
+
+            if ($dj) {
+                return [
+                    'username' => $dj->username,
+                    'look' => $dj->look,
+                    'show_name' => 'Live DJ',
+                    'is_manual' => true,
+                ];
+            }
+        }
+
+        $currentSlot = RadioSchedule::with('user:id,username,look')
+            ->active()
+            ->where('day', $this->getCurrentDay())
+            ->whereTime('start_time', '<=', now()->format('H:i:s'))
+            ->whereTime('end_time', '>=', now()->format('H:i:s'))
+            ->first();
+
+        if ($currentSlot?->user) {
+            return [
+                'username' => $currentSlot->user->username,
+                'look' => $currentSlot->user->look,
+                'show_name' => $currentSlot->show_name,
+                'start_time' => $currentSlot->start_time->format('H:i'),
+                'end_time' => $currentSlot->end_time->format('H:i'),
+                'is_manual' => false,
+            ];
+        }
+
+        return null;
+    }
+
+    public function getTodaySchedule(): \Illuminate\Database\Eloquent\Collection
+    {
+        return Cache::remember('radio_schedule_today', 60, fn () => RadioSchedule::with('user:id,username,look')
+            ->active()
+            ->today()
+            ->orderBy('start_time')
+            ->get());
+    }
+
+    public function getFullSchedule(): \Illuminate\Support\Collection
+    {
+        return Cache::remember('radio_schedule_all', 300, fn () => RadioSchedule::with('user:id,username,look')
+            ->active()
+            ->ordered()
+            ->get()
+            ->groupBy('day'));
+    }
+
+    private function getCurrentDay(): string
+    {
+        return strtolower(now()->format('l'));
+    }
+}