feat: Persian panel/API fixes and structural-model tweaks

- lang/fa: add validation/auth/passwords/pagination translations so admin
  and API validation errors are in Persian
- templates: soft-delete instead of cascade-deleting their generations;
  keep resolving trashed template on generations (labels/downloads)
- templates: add TemplateInfolist with a real thumbnail ImageEntry
- generations: auto-name template-based generations and use that name
  for the download file and as a searchable column
- admin: show all dates as Jalali via ->jalaliDate()/->jalaliDateTime()
  Filament macros (App\Support\Jalali)
- wallets: harden the deposit/withdraw action to surface the exact error
  instead of a 500
- profile: normalize Iranian mobile numbers (App\Support\Mobile),
  add social_links, coerce notification-preference booleans, require the
  current password to delete an account

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013P66ea1dC5CVM9t29496t5

app/Models/TemplateGeneration.php

@@ -29,7 +29,9 @@ class TemplateGeneration extends Model
      */
     public function template(): BelongsTo
     {
-        return $this->belongsTo(Template::class);
+        // Keep resolving the template even after it has been soft-deleted, so past
+        // generations stay downloadable and keep their labels.
+        return $this->belongsTo(Template::class)->withTrashed();
     }
 
     /**
@@ -40,6 +42,31 @@ class TemplateGeneration extends Model
         return $this->belongsTo(User::class, 'requested_by');
     }
 
+    /**
+     * A human-friendly name for this generation, used in the admin panel and as the
+     * downloaded file name. Falls back to the template title plus a short id.
+     */
+    public function displayName(): string
+    {
+        $base = $this->title ?: $this->template?->title ?: 'presentation';
+
+        return trim($base).' - '.$this->uuid;
+    }
+
+    /**
+     * Sanitized file name (without extension) for downloads. Keeps Persian characters
+     * but drops anything a filesystem or HTTP header would choke on.
+     */
+    public function downloadFilename(): string
+    {
+        $base = $this->title ?: $this->template?->title ?: $this->template?->slug ?: 'presentation';
+
+        $clean = preg_replace('/[\/\\\\?%*:|"<>\r\n]+/u', ' ', (string) $base) ?? '';
+        $clean = trim(preg_replace('/\s+/u', ' ', $clean) ?? '');
+
+        return ($clean !== '' ? $clean : 'presentation').' - '.substr($this->uuid, 0, 8);
+    }
+
     /**
      * @return array<string, string>
      */