feat: extend module platform with UI slots, runtime components, CLI tooling and {{userId}} search support

Completes the generic module platform that enables modules to contribute
UI elements, runtime JS components, and search resources without any
core hardcoding.

New generic UI slot types:
- topbar.right_item: module-contributed topbar buttons
- layout.body_end_template: module-contributed dialog/overlay templates
- layout.head_style: module-contributed global CSS
- runtime.component: declarative JS component registration with phase ordering

New infrastructure:
- ModuleAutoloader: PSR-4 autoloading for module-local PHP classes
- ModuleRuntimePageBuilder: symlinks module pages into runtime directory
- ModuleRuntimeAssetPublisher: publishes module CSS/JS to web/modules/
- ModulePermissionSynchronizer: syncs module permissions to DB
- CLI scripts: module-runtime-sync, module-build, module-migrate,
  module-permissions-sync, module-assets-sync
- {{userId}} placeholder in SearchDataService for user-scoped search queries
- Component runtime with phased initialization (early/default/late)
- AppContainer.protectExistingBindings() to prevent module→core overwrites
- Architecture tests: ModuleStructureContractTest, CoreTemplateIsolationTest,
  FrontendComponentRuntimeContractTest, AppContainerIsolationContractTest

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/Service/CustomField/UserCustomFieldValueService.php

@@ -410,7 +410,16 @@ class UserCustomFieldValueService
         return ['prepared' => $prepared, 'errors' => $errors];
     }
 
-    public function extractAddressBookFilterSpec(array $query, int $currentUserId): array
+    /**
+     * Extract custom field filter specification from a URL query.
+     *
+     * Parses cf_*, cfm_*, and cfd_* query parameters against the user's
+     * visible custom field definitions and returns validated filter data.
+     *
+     * @param array<string, mixed> $query URL query parameters
+     * @return array{definitions: list<array<string, mixed>>, filters: array<string, array<int, mixed>>, query: array<string, string>}
+     */
+    public function extractCustomFieldFilterSpec(array $query, int $currentUserId): array
     {
         $tenantIds = $this->userScopeGateway()->getUserTenantIds($currentUserId);
         $definitions = TenantCustomFieldDefinitionRepository::listFilterableByTenantIds($tenantIds);