ver. 0.296: REST API for ordersPRO — orders management, dictionaries, API key auth

- New API layer: ApiRouter, OrdersApiController, DictionariesApiController
- Orders API: list (with filters/pagination/updated_since), details, change status, set paid/unpaid
- Dictionaries API: order statuses, transport methods, payment methods
- X-Api-Key authentication via pp_settings.api_key
- OrderRepository: listForApi(), findForApi(), touchUpdatedAt()
- updated_at column on pp_shop_orders for polling support
- api.php: skip session for API requests, route to ApiRouter
- SettingsController: api_key field in system tab
- 30 new tests (666 total, 1930 assertions)

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

docs/TESTING.md

@@ -23,10 +23,10 @@ composer test              # standard
 ## Aktualny stan
 
 ```text
-OK (636 tests, 1868 assertions)
+OK (666 tests, 1930 assertions)
 ```
 
-Zweryfikowano: 2026-02-19 (ver. 0.295)
+Zweryfikowano: 2026-02-19 (ver. 0.296)
 
 ## Konfiguracja
 
@@ -85,12 +85,17 @@ tests/
 |           |-- ShopStatusesControllerTest.php
 |           |-- ShopTransportControllerTest.php
 |           `-- UsersControllerTest.php
+|   `-- api/
+|       |-- ApiRouterTest.php
+|       `-- Controllers/
+|           |-- OrdersApiControllerTest.php
+|           `-- DictionariesApiControllerTest.php
 `-- Integration/                (puste — zarezerwowane)
 ```
 
 ## Dodawanie nowych testow
 
-1. Plik w `tests/Unit/Domain/<Module>/<Class>Test.php` lub `tests/Unit/admin/Controllers/<Class>Test.php`.
+1. Plik w `tests/Unit/Domain/<Module>/<Class>Test.php`, `tests/Unit/admin/Controllers/<Class>Test.php` lub `tests/Unit/api/Controllers/<Class>Test.php`.
 2. Rozszerz `PHPUnit\Framework\TestCase`.
 3. Nazwy metod zaczynaj od `test`.
 4. Wzorzec AAA: Arrange, Act, Assert.