Show brand name beside logo in topbar + fix global search

- brandLogo closure now returns HtmlString with <img> + <span> side-by-side
  so the company name appears next to the logo (Filament default replaces
  brandName when brandLogo is set)
- Global search: explicit ->globalSearch() + ->globalSearchKeyBindings(['mod+k'])
  (use Mod which Filament auto-maps to Cmd/Ctrl per platform) +
  ->globalSearchFieldKeyBindingSuffix() shows keyboard hint in search bar
- Same applied to Central panel

app/Providers/Filament/CentralPanelProvider.php

@@ -58,7 +58,9 @@ class CentralPanelProvider extends PanelProvider
             ])
             ->databaseNotifications()
             ->databaseNotificationsPolling('60s')
-            ->globalSearchKeyBindings(['command+k', 'ctrl+k'])
+            ->globalSearch()
+            ->globalSearchKeyBindings(['mod+k'])
+            ->globalSearchFieldKeyBindingSuffix()
             ->renderHook(
                 PanelsRenderHook::HEAD_END,
                 fn (): string => Blade::render(<<<'BLADE'