refactor(ui): replace inline INPUT_CLS/BTN_DANGER/action link constants with component classes

- Replace 13 local INPUT_CLS/SELECT_CLS/LABEL_CLS/BTN_DANGER constants with
  app-input, app-select, app-label, app-action-danger-btn component classes
  (CustomFieldFilterBar, RolePresetsEditor, FieldCard, BlueprintFieldCatalog,
  BlueprintFieldEditor, BlueprintsClient, EstimateWizard, EstimateWorkspace-
  DraftEditor, DemandLineEditor, ScopeItemEditor, AssumptionEditor,
  ProjectWizard, BulkEditModal)
- Replace inline text-blue-600/text-red-500 action link strings with
  app-action-edit / app-action-delete in AllocationsClient, ProjectsClient,
  ScenarioPlanner, ProjectDemandsTable, RolesClient, BlueprintsClient,
  CreateTaskModal, RateCardsClient, UsersClient, ManagementLevelsClient

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

apps/web/src/components/admin/UsersClient.tsx

@@ -669,7 +669,7 @@ export function UsersClient() {
                     <button
                       type="button"
                       onClick={() => setDeleteTarget({ userId: user.id, userName: user.name ?? user.email })}
-                      className="text-xs text-red-500 hover:text-red-700 dark:text-red-400 dark:hover:text-red-300 font-medium"
+                      className="app-action-delete"
                       title="Permanently delete user"
                     >
                       Delete