refactor(WEB):공정 단계 completion_type 한글→영문 코드 전환

- StepCompletionType을 영문 코드로 변경 (click_complete 등)
- STEP_COMPLETION_TYPE_LABELS 라벨 맵 추가
- StepDetail, StepForm, actions 변환 로직 적용

src/components/process-management/actions.ts

@@ -605,7 +605,7 @@ function transformStepApiToFrontend(apiStep: ApiProcessStep): ProcessStep {
     order: apiStep.sort_order,
     connectionType: (apiStep.connection_type as ProcessStep['connectionType']) || '없음',
     connectionTarget: apiStep.connection_target ?? undefined,
-    completionType: (apiStep.completion_type as ProcessStep['completionType']) || '클릭 시 완료',
+    completionType: (apiStep.completion_type as ProcessStep['completionType']) || 'click_complete',
   };
 }