Refactor: Create shared AttachmentService and AttachmentModel

- Created common AttachmentService for all modules (app/Services/)
- Created common AttachmentModel (app/Models/)
- Created common migration (app/Database/Migrations/)
- Updated Tasks module to use shared AttachmentService
- Added Twig functions: format_filesize(), get_file_icon()
- Removed duplicate TaskAttachmentModel and task_attachments migration
- AttachmentService can be used by any module: task, deal, contact, etc.

app/Libraries/Twig/TwigGlobalsExtension.php

@@ -52,6 +52,10 @@ class TwigGlobalsExtension extends AbstractExtension
             new TwigFunction('is_module_active', [$this, 'isModuleActive'], ['is_safe' => ['html']]),
             new TwigFunction('is_module_available', [$this, 'isModuleAvailable'], ['is_safe' => ['html']]),
             new TwigFunction('csrf_meta', [$this, 'csrf_meta'], ['is_safe' => ['html']]),
+
+            // Attachment functions
+            new TwigFunction('format_filesize', [$this, 'formatFilesize'], ['is_safe' => ['html']]),
+            new TwigFunction('get_file_icon', [$this, 'getFileIcon'], ['is_safe' => ['html']]),
         ];
     }
 
@@ -59,6 +63,42 @@ class TwigGlobalsExtension extends AbstractExtension
     {
         return csrf_meta();
     }
+
+    public function formatFilesize(int $bytes): string
+    {
+        if ($bytes >= 1073741824) {
+            return number_format($bytes / 1073741824, 2) . ' GB';
+        } elseif ($bytes >= 1048576) {
+            return number_format($bytes / 1048576, 2) . ' MB';
+        } elseif ($bytes >= 1024) {
+            return number_format($bytes / 1024, 2) . ' KB';
+        }
+
+        return $bytes . ' B';
+    }
+
+    public function getFileIcon(string $fileType): string
+    {
+        $icons = [
+            'image' => 'fa-file-image',
+            'pdf' => 'fa-file-pdf',
+            'word' => 'fa-file-word',
+            'excel' => 'fa-file-excel',
+            'powerpoint' => 'fa-file-powerpoint',
+            'zip' => 'fa-file-zipper',
+            'text' => 'fa-file-lines',
+            'video' => 'fa-file-video',
+            'audio' => 'fa-file-audio',
+        ];
+
+        foreach ($icons as $key => $icon) {
+            if (stripos($fileType, $key) !== false) {
+                return $icon;
+            }
+        }
+
+        return 'fa-file';
+    }
     // ========================================
     // Access Functions для Twig
     // ========================================