Migrate omsorgapp to browser SPA, add Docker/CI build setup

- omsorgapp: drop Electron, run as a plain Vite/React browser app; refresh
  token moves to an HttpOnly cookie (omsorgCore), CORS added for the new
  browser origin, document download/preview switched to Blob-based browser
  APIs.
- Add Dockerfiles for omsorgCore, omsorgapp, and omsorgWeb, a docker-compose.yml
  wiring Postgres/MySQL/all three apps together, and a Gitea Actions workflow
  that builds and pushes images to the repo's container registry on push to
  main and on version tags.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

omsorgWeb/mitarbeiter-app/api-client-php/docs/Api/OrdersApi.md

@@ -5,6 +5,7 @@ All URIs are relative to http://localhost, except if the operation defines anoth
 | Method | HTTP request | Description |
 | ------------- | ------------- | ------------- |
 | [**apiOrdersGet()**](OrdersApi.md#apiOrdersGet) | **GET** /api/orders |  |
+| [**apiOrdersIdDelete()**](OrdersApi.md#apiOrdersIdDelete) | **DELETE** /api/orders/{id} |  |
 | [**apiOrdersIdGet()**](OrdersApi.md#apiOrdersIdGet) | **GET** /api/orders/{id} |  |
 | [**apiOrdersIdPut()**](OrdersApi.md#apiOrdersIdPut) | **PUT** /api/orders/{id} |  |
 | [**apiOrdersPost()**](OrdersApi.md#apiOrdersPost) | **POST** /api/orders |  |
@@ -13,7 +14,7 @@ All URIs are relative to http://localhost, except if the operation defines anoth
 ## `apiOrdersGet()`
 
 ```php
-apiOrdersGet($search, $status_id, $facility_id, $page, $page_size): \OmsorgCoreClient\Model\OrderResponsePagedResponse
+apiOrdersGet($search, $status_id, $facility_id, $priority, $required_qualification, $shift_type, $page, $page_size): \OmsorgCoreClient\Model\OrderResponsePagedResponse
 ```
 
 
@@ -38,11 +39,14 @@ $apiInstance = new OmsorgCoreClient\Api\OrdersApi(
 $search = 'search_example'; // string
 $status_id = 'status_id_example'; // string
 $facility_id = 'facility_id_example'; // string
+$priority = 'priority_example'; // string
+$required_qualification = 'required_qualification_example'; // string
+$shift_type = 'shift_type_example'; // string
 $page = 1; // int
 $page_size = 20; // int
 
 try {
-    $result = $apiInstance->apiOrdersGet($search, $status_id, $facility_id, $page, $page_size);
+    $result = $apiInstance->apiOrdersGet($search, $status_id, $facility_id, $priority, $required_qualification, $shift_type, $page, $page_size);
     print_r($result);
 } catch (Exception $e) {
     echo 'Exception when calling OrdersApi->apiOrdersGet: ', $e->getMessage(), PHP_EOL;
@@ -56,6 +60,9 @@ try {
 | **search** | **string**|  | [optional] |
 | **status_id** | **string**|  | [optional] |
 | **facility_id** | **string**|  | [optional] |
+| **priority** | **string**|  | [optional] |
+| **required_qualification** | **string**|  | [optional] |
+| **shift_type** | **string**|  | [optional] |
 | **page** | **int**|  | [optional] [default to 1] |
 | **page_size** | **int**|  | [optional] [default to 20] |
 
@@ -76,6 +83,63 @@ try {
 [[Back to Model list]](../../README.md#models)
 [[Back to README]](../../README.md)
 
+## `apiOrdersIdDelete()`
+
+```php
+apiOrdersIdDelete($id)
+```
+
+
+
+### Example
+
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+
+// Configure Bearer (JWT) authorization: Bearer
+$config = OmsorgCoreClient\Configuration::getDefaultConfiguration()->setAccessToken('YOUR_ACCESS_TOKEN');
+
+
+$apiInstance = new OmsorgCoreClient\Api\OrdersApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client(),
+    $config
+);
+$id = 'id_example'; // string
+
+try {
+    $apiInstance->apiOrdersIdDelete($id);
+} catch (Exception $e) {
+    echo 'Exception when calling OrdersApi->apiOrdersIdDelete: ', $e->getMessage(), PHP_EOL;
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+| ------------- | ------------- | ------------- | ------------- |
+| **id** | **string**|  | |
+
+### Return type
+
+void (empty response body)
+
+### Authorization
+
+[Bearer](../../README.md#Bearer)
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
+[[Back to Model list]](../../README.md#models)
+[[Back to README]](../../README.md)
+
 ## `apiOrdersIdGet()`
 
 ```php