ver. 0.283: Legacy class cleanup — S, Html, Email, Image, Log, Mobile_Detect → Shared namespace

- Migrate class.S → Shared\Helpers\Helpers (140+ files), remove 12 unused methods
- Migrate class.Html → Shared\Html\Html
- Migrate class.Email → Shared\Email\Email
- Migrate class.Image → Shared\Image\ImageManipulator
- Delete class.Log (unused), class.Mobile_Detect (outdated UA detection)
- Remove grid library loading from admin (index.php, ajax.php)
- Replace gridEdit usage in 10 admin templates with grid-edit-replacement.php
- Fix grid-edit-replacement.php AJAX to send values as JSON (grid.js compat)
- Remove mobile layout conditionals (m_html/m_css/m_js) from Site + LayoutsRepository
- Remove \Log::save_log() calls from OrderAdminService, ShopOrder, Order

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

autoload/Domain/Update/UpdateRepository.php

@@ -23,9 +23,9 @@ class UpdateRepository
 
         $log = [];
         $log[] = '[START] Rozpoczęcie aktualizacji - ' . date( 'Y-m-d H:i:s' );
-        $log[] = '[INFO] Aktualna wersja: ' . \S::get_version();
+        $log[] = '[INFO] Aktualna wersja: ' . \Shared\Helpers\Helpers::get_version();
 
-        \S::delete_session( 'new-version' );
+        \Shared\Helpers\Helpers::delete_session( 'new-version' );
 
         $versionsUrl = 'https://shoppro.project-dc.pl/updates/versions.php?key=' . $settings['update_key'];
         $versions = @file_get_contents( $versionsUrl );
@@ -42,7 +42,7 @@ class UpdateRepository
 
         foreach ( $versions as $ver ) {
             $ver = trim( $ver );
-            if ( floatval( $ver ) <= (float) \S::get_version() ) {
+            if ( floatval( $ver ) <= (float) \Shared\Helpers\Helpers::get_version() ) {
                 continue;
             }
 
@@ -197,7 +197,7 @@ class UpdateRepository
             if ( strpos( $entry, 'D: ' ) !== false ) {
                 $path = substr( $entry, 3 );
                 if ( is_dir( $path ) ) {
-                    \S::delete_dir( $path );
+                    \Shared\Helpers\Helpers::delete_dir( $path );
                     $deletedDirs++;
                 }
             }