Faza 7: White-label per tenant — logo + theme color dinamic

- spatie/laravel-medialibrary instalat (migration media table)
- filament/spatie-laravel-media-library-plugin
- Company implements HasMedia + InteractsWithMedia
  - collections: 'logo' + 'favicon' (singleFile)
  - getLogoUrl() / getFaviconUrl() helpers
- Settings page extins: secțiune Logo & favicon cu FileUpload
  - On save: clear collection + addMedia from temp upload + cleanup tmp file
- TenantPanelProvider render hooks:
  - HEAD_END: theme-color meta + favicon + CSS vars override
    (--primary-50 → --primary-950 generate din hex theme_color)
  - SIDEBAR_LOGO_BEFORE: afișare logo upload-uit, max-height 56px

Cum funcționează:
- Tenant uploadează logo în Settings
- La fiecare request, render hook injectează <style> cu CSS vars custom
- Filament respectă --primary-* → toate butoanele/badge-urile primesc culoarea brand
- Logo apare deasupra meniului (sidebar)

app/Filament/Tenant/Pages/Settings.php

@@ -85,6 +85,27 @@ class Settings extends Page
                             ->label('Mărci auto suportate (separate prin virgulă)')
                             ->rows(2),
                     ]),
+                Schemas\Components\Section::make('Logo & favicon')
+                    ->columns(2)
+                    ->schema([
+                        Forms\Components\FileUpload::make('logo')
+                            ->label('Logo')
+                            ->image()
+                            ->imageEditor()
+                            ->disk('public')
+                            ->directory('tmp-uploads')
+                            ->visibility('public')
+                            ->maxSize(2048)
+                            ->helperText('PNG/SVG, max 2 MB. Apare în sidebar.'),
+                        Forms\Components\FileUpload::make('favicon')
+                            ->label('Favicon')
+                            ->image()
+                            ->disk('public')
+                            ->directory('tmp-uploads')
+                            ->visibility('public')
+                            ->maxSize(512)
+                            ->helperText('PNG/ICO, max 512 KB.'),
+                    ]),
             ])
             ->statePath('data');
     }
@@ -113,6 +134,18 @@ class Settings extends Page
             ]),
         ]);
 
+        // Logo + favicon → Spatie Media Library
+        foreach (['logo', 'favicon'] as $col) {
+            $path = $data[$col] ?? null;
+            if (! $path) continue;
+            $abs = \Illuminate\Support\Facades\Storage::disk('public')->path($path);
+            if (file_exists($abs)) {
+                $company->clearMediaCollection($col);
+                $company->addMedia($abs)->preservingOriginal()->toMediaCollection($col);
+                @unlink($abs);
+            }
+        }
+
         Notification::make()->title('Setări salvate')->success()->send();
     }
 }