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>

.paul/codebase/architecture.md

@@ -52,7 +52,16 @@ autoload/
 │   ├── Html/Html.php               HTML form element builder
 │   └── Image/ImageManipulator.php  Image processing
 │
-├── admin/
+├── admin/                          Mixed: legacy lowercase namespaces + new Admin\* PSR-4
+│   │
+│   │  NEW (Phase 6) — namespace Admin\* (PascalCase, PSR-4)
+│   ├── ViewModels/Forms/           Admin\ViewModels\Forms\* — Form Edit System (5 VMs, 687 L)
+│   ├── Validation/FormValidator.php
+│   ├── Support/TableListRequestFactory.php   Admin\Support — list parser
+│   ├── Support/Forms/FormRequestHandler.php  POST + CSRF + validate + persist
+│   ├── Support/Forms/FormFieldRenderer.php   HTML renderer (delegates Shared\Html\Html)
+│   │
+│   │  LEGACY — namespace admin\* (lowercase, hybrid loader)
 │   ├── class.Site.php              Admin routing + 2FA
 │   ├── controls/class.*.php        18 request handler classes (static methods)
 │   ├── factory/class.*.php         18 @deprecated wrappers
@@ -88,6 +97,7 @@ plugins/
 | `front\factory\` | `autoload/front/factory/class.*.php` | Legacy lowercase |
 | `Domain\*\` | `autoload/Domain/*/ClassName.php` | PSR-4 PascalCase |
 | `Shared\*\` | `autoload/Shared/*/ClassName.php` | PSR-4 PascalCase |
+| `Admin\*\` | `autoload/admin/*/ClassName.php` | PSR-4 PascalCase namespace, lowercase folder (Win fs collision with legacy) |
 
 ## Key Patterns