feat(06-admin-base): Admin\ base infrastructure — Form Edit System + Support layer (Phase 6)

Phase 6 zamknięta po 2 planach. Pełny fundament dla Phase 7-13 (migracja
17 admin controllers do Admin\ namespace).

06-01 (Forms infrastructure):
- Admin\ViewModels\Forms\* — 5 ViewModeli (687 L)
- Admin\Validation\FormValidator (196 L)
- composer.json: php >=7.4, PSR-4 paths cross-platform safe
  (Admin\ → autoload/admin/, Frontend\ → autoload/front/)

06-02 (Support layer):
- Admin\Support\TableListRequestFactory (99 L) — parser list z $_GET
- Admin\Support\Forms\FormRequestHandler (159 L) — POST + CSRF + walidacja + persist
- Admin\Support\Forms\FormFieldRenderer (494 L) — renderer HTML pól

Decyzje:
- Brak BaseController — Phase 7+ kontrolery jako POJOs z DI (jak shopPRO)
- PSR-4 filename fix: TableListRequestFactory.php (bez shopPRO 'class.' prefix)
- PascalCase namespace (Admin\Support) na lowercase folder admin/
  ze względu na Windows fs case-insensitivity vs legacy admin/controls/

Pliki: 8 nowych klas, 1635 L kodu PHP 7.4-kompatybilnego, zero regresji.
Smoke test: walidacja e-maila zwraca PL komunikat, factory parsuje
?page=&per_page=&sort=&filter=, Domain/Shared nadal ładują się.

PHPUnit: 37/37 OK.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

autoload/admin/Support/TableListRequestFactory.php

@@ -0,0 +1,99 @@
+<?php
+namespace Admin\Support;
+
+class TableListRequestFactory
+{
+    public const DEFAULT_PER_PAGE_OPTIONS = [5, 10, 15, 25, 50, 100];
+    public const DEFAULT_PER_PAGE = 15;
+
+    /**
+     * Buduje kontekst listy (filtry, sortowanie, paginacja) z requestu.
+     *
+     * @return array{
+     *   page:int,
+     *   perPage:int,
+     *   perPageOptions:array<int,int>,
+     *   filters:array<string,string>,
+     *   viewFilters:array<int,array<string,mixed>>,
+     *   queryFilters:array<string,string>,
+     *   sortColumn:string,
+     *   sortDir:string
+     * }
+     */
+    public static function fromRequest(
+        array $filterDefinitions,
+        array $sortableColumns,
+        string $defaultSortColumn = 'date_add',
+        ?array $perPageOptions = null,
+        ?int $defaultPerPage = null
+    ): array {
+        if ($perPageOptions === null) {
+            $perPageOptions = self::DEFAULT_PER_PAGE_OPTIONS;
+        }
+
+        if ($defaultPerPage === null) {
+            $defaultPerPage = self::DEFAULT_PER_PAGE;
+        }
+
+        if (!in_array($defaultPerPage, $perPageOptions, true)) {
+            $defaultPerPage = (int)$perPageOptions[0];
+        }
+
+        $page = max(1, (int)\Shared\Helpers\Helpers::get('page'));
+        $perPage = (int)\Shared\Helpers\Helpers::get('per_page');
+        if (!in_array($perPage, $perPageOptions, true)) {
+            $perPage = $defaultPerPage;
+        }
+
+        $filters = [];
+        $viewFilters = [];
+        $queryFilters = [];
+
+        foreach ($filterDefinitions as $definition) {
+            $key = (string)($definition['key'] ?? '');
+            if ($key === '') {
+                continue;
+            }
+
+            $type = (string)($definition['type'] ?? 'text');
+            $value = (string)\Shared\Helpers\Helpers::get($key);
+
+            $filters[$key] = $value;
+            $queryFilters[$key] = $value;
+
+            $filterConfig = [
+                'key' => $key,
+                'label' => (string)($definition['label'] ?? $key),
+                'type' => $type,
+                'value' => $value,
+            ];
+
+            if ($type === 'select' && isset($definition['options']) && is_array($definition['options'])) {
+                $filterConfig['options'] = $definition['options'];
+            }
+
+            $viewFilters[] = $filterConfig;
+        }
+
+        $sortColumn = trim((string)\Shared\Helpers\Helpers::get('sort'));
+        if (!in_array($sortColumn, $sortableColumns, true)) {
+            $sortColumn = $defaultSortColumn;
+        }
+
+        $sortDir = strtoupper(trim((string)\Shared\Helpers\Helpers::get('dir')));
+        if (!in_array($sortDir, ['ASC', 'DESC'], true)) {
+            $sortDir = 'DESC';
+        }
+
+        return [
+            'page' => $page,
+            'perPage' => $perPage,
+            'perPageOptions' => $perPageOptions,
+            'filters' => $filters,
+            'viewFilters' => $viewFilters,
+            'queryFilters' => $queryFilters,
+            'sortColumn' => $sortColumn,
+            'sortDir' => $sortDir,
+        ];
+    }
+}