🎨 Palette: 비동기 버튼 로딩 상태의 웹 접근성(aria-busy) 개선

.jules/palette.md

@@ -13,3 +13,7 @@
 ## 2026-07-13 - Async Table Actions UX
 **Learning:** Adding explicit loading and disabled states to table action buttons that invoke asynchronous processes helps prevent redundant API calls and visually assures the user that their request is being handled.
 **Action:** Consistently apply `disabled` state and `Loading...` text changes to inline table action buttons linked to async workflows, and carefully preserve underlying DOM structures with `Array.from(btn.childNodes)` during the loading cycle to avoid rendering regressions.
+
+## 2024-07-20 - 비동기 작업 중 `aria-busy` 속성 활용
+**Learning:** 비동기 작업 중에 로딩 상태를 시각적으로만 표시하는 것을 넘어서 `aria-busy="true"` 속성을 동적으로 추가하면 스크린 리더 및 보조 기술에 상태를 정확히 전달할 수 있어 웹 접근성이 크게 향상됩니다.
+**Action:** 버튼이나 요소가 비동기 통신을 대기하는 동안 상태 변경이 일어날 때 항상 `aria-busy` 속성을 설정하고 작업이 완료되는 `finally` 블록에서 안전하게 제거하도록 합니다.

src/main/resources/static/assets/viewer/demo.js

@@ -147,10 +147,12 @@ function renderHistory(history = loadHistory()) {
       actionsCell.appendChild(createActionButton("Details", (e) => {
         const btn = e.currentTarget;
         const initialChildren = Array.from(btn.childNodes);
+        btn.setAttribute("aria-busy", "true");
         btn.disabled = true;
         btn.textContent = "Loading...";
         openJobDetail(job).finally(() => {
           btn.replaceChildren(...initialChildren);
+          btn.removeAttribute("aria-busy");
           btn.disabled = false;
         });
       }));
@@ -298,6 +300,7 @@ async function retryActiveJob() {
 
   const jobId = activeJobDetail.jobId;
   const initialChildren = Array.from(el.retryJobBtn.childNodes);
+  el.retryJobBtn.setAttribute("aria-busy", "true");
   el.retryJobBtn.disabled = true;
   el.retryJobBtn.textContent = "Retrying...";
   setStatus("Requesting operator retry...");
@@ -339,6 +342,7 @@ async function retryActiveJob() {
     setError("Network error while requesting retry. Retry when the service is reachable.");
   } finally {
     el.retryJobBtn.replaceChildren(...initialChildren);
+    el.retryJobBtn.removeAttribute("aria-busy");
     el.retryJobBtn.disabled = false;
   }
 }
@@ -413,6 +417,7 @@ async function refreshKpis() {
 
 async function refreshKpiEvidence() {
   const initialChildren = Array.from(el.refreshEvidenceBtn.childNodes);
+  el.refreshEvidenceBtn.setAttribute("aria-busy", "true");
   el.refreshEvidenceBtn.disabled = true;
   el.refreshEvidenceBtn.textContent = "Refreshing...";
 
@@ -428,12 +433,14 @@ async function refreshKpiEvidence() {
     el.kpiExportStatus.textContent = "Snapshot evidence is unavailable while the service is unreachable.";
   } finally {
     el.refreshEvidenceBtn.replaceChildren(...initialChildren);
+    el.refreshEvidenceBtn.removeAttribute("aria-busy");
     el.refreshEvidenceBtn.disabled = false;
   }
 }
 
 async function loadDemoData() {
   const initialChildren = Array.from(el.loadDemoDataBtn.childNodes);
+  el.loadDemoDataBtn.setAttribute("aria-busy", "true");
   el.loadDemoDataBtn.disabled = true;
   el.loadDemoDataBtn.textContent = "Loading...";
   setStatus("Loading seeded buyer-demo story...");
@@ -459,6 +466,7 @@ async function loadDemoData() {
     setError("Unable to load seeded demo story.");
   } finally {
     el.loadDemoDataBtn.replaceChildren(...initialChildren);
+    el.loadDemoDataBtn.removeAttribute("aria-busy");
     el.loadDemoDataBtn.disabled = false;
   }
 }
@@ -506,6 +514,7 @@ async function submitDocument(event) {
   }
 
   const initialChildren = Array.from(el.submitBtn.childNodes);
+  el.submitBtn.setAttribute("aria-busy", "true");
   el.submitBtn.disabled = true;
   el.submitBtn.textContent = "Submitting...";
   setStatus("Submitting document...");
@@ -551,6 +560,7 @@ async function submitDocument(event) {
     setError("Network error while submitting. Retry when the service is reachable.");
   } finally {
     el.submitBtn.replaceChildren(...initialChildren);
+    el.submitBtn.removeAttribute("aria-busy");
     el.submitBtn.disabled = false;
   }
 }