feat: implement Spatie Media Library integration

with CRUD operations and media management UI

app/Filament/Resources/Media/Pages/EditMedia.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace App\Filament\Resources\Media\Pages;
+
+use App\Filament\Resources\Media\MediaResource;
+use Filament\Actions\DeleteAction;
+use Filament\Actions\ViewAction;
+use Filament\Resources\Pages\EditRecord;
+use Illuminate\Support\Facades\Storage;
+
+class EditMedia extends EditRecord
+{
+    protected static string $resource = MediaResource::class;
+
+    protected ?string $uploadedFile = null;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            ViewAction::make(),
+            DeleteAction::make(),
+        ];
+    }
+
+    protected function mutateFormDataBeforeSave(array $data): array
+    {
+        // Extract the file data if a new file was uploaded
+        $file = $data['file'] ?? null;
+        unset($data['file']);
+
+        // Only update file-related fields if a new file was uploaded
+        if ($file && $file !== $this->record->getPathRelativeToRoot()) {
+            $this->uploadedFile = $file;
+
+            // Keep the original file_name to prevent breaking existing references
+            // $data['file_name'] is not updated - we preserve the original filename
+            $data['mime_type'] = Storage::disk('public')->exists($file)
+                ? Storage::disk('public')->mimeType($file)
+                : 'application/octet-stream';
+            $data['size'] = Storage::disk('public')->exists($file)
+                ? Storage::disk('public')->size($file)
+                : 0;
+        }
+
+        return $data;
+    }
+
+    protected function afterSave(): void
+    {
+        if ($this->uploadedFile && $this->record) {
+            $disk = Storage::disk('public');
+            $mediaDirectory = (string) $this->record->id;
+
+            // Delete old file if it exists
+            $oldPath = $mediaDirectory.'/'.$this->record->getOriginal('file_name');
+            if ($disk->exists($oldPath)) {
+                $disk->delete($oldPath);
+            }
+
+            // Move new file to Spatie's expected location using the original filename
+            if ($disk->exists($this->uploadedFile)) {
+                $disk->makeDirectory($mediaDirectory);
+                // Use the original file_name to preserve existing references
+                $newPath = $mediaDirectory.'/'.$this->record->file_name;
+                $disk->move($this->uploadedFile, $newPath);
+            }
+
+            // Redirect to the same page to refresh the form state
+            $this->redirect(static::getUrl(['record' => $this->record]), navigate: true);
+        }
+    }
+}