fix: attachment file handling - real files, inline preview, click to open

- FileService: use Storage::temporaryUrl() standard API instead of manual signed route
- FileService: added isImage() and getPreviewUrl() helpers
- Seeder: create actual files on disk instead of fake paths
- Edit Feedback: new 'Attachments' section showing all feedback files with thumbnails
- Interactions modal: image preview thumbnails + inline click-to-open
- New footer layout: edit-footer.blade.php wrapper for attachments + similar cases

app/Services/FileService.php

@@ -74,13 +74,28 @@ class FileService
             return Storage::disk('public')->url($attachment->path);
         }
 
-        return URL::temporarySignedRoute(
-            'storage.local',
+        return Storage::disk($attachment->disk)->temporaryUrl(
+            $attachment->path,
             now()->addMinutes($minutes),
-            ['path' => $attachment->path]
         );
     }
 
+    /**
+     * Generate a preview (inline) URL vs download URL.
+     */
+    public function getPreviewUrl(FeedbackAttachment $attachment, int $minutes = 60): string
+    {
+        return $this->getTemporaryUrl($attachment, $minutes);
+    }
+
+    /**
+     * Check if attachment is an image (for inline preview).
+     */
+    public function isImage(FeedbackAttachment $attachment): bool
+    {
+        return in_array($attachment->mime_type, ['image/jpeg', 'image/jpg', 'image/png']);
+    }
+
     /**
      * Get all attachments of a specific collection for a model.
      */