🎨 Palette: 필수 입력 필드 명시적 표시 접근성 개선

src/main/java/com/clearfolio/viewer/controller/ViewerUiController.java

@@ -185,7 +185,7 @@ private static String demoShellHtml() {
                         </div>
 
                         <form id="upload-form" class="upload-form" enctype="multipart/form-data">
-                          <label class="field-label" for="file-input">Document</label>
+                          <label class="field-label" for="file-input"><span>Document (required)</span></label>
                           <input id="file-input" name="file" class="file-input" type="file" required />
 
                           <div class="actions">

src/test/java/com/clearfolio/viewer/controller/ViewerUiRequiredFieldAccessibilityTest.java

@@ -0,0 +1,34 @@
+package com.clearfolio.viewer.controller;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+class ViewerUiRequiredFieldAccessibilityTest {
+
+    private WebTestClient webTestClient;
+
+    @BeforeEach
+    void setUp() {
+        ViewerUiController controller = new ViewerUiController();
+        webTestClient = WebTestClient.bindToController(controller).build();
+    }
+
+    @Test
+    void explicitAccessiblePatternForRequiredFormFields() {
+        webTestClient.get()
+                .uri("/")
+                .exchange()
+                .expectStatus().isOk()
+                .expectHeader().contentTypeCompatibleWith(MediaType.TEXT_HTML)
+                .expectBody(String.class)
+                .value(body -> {
+                    assertTrue(body.contains(
+                        "<label class=\"field-label\" for=\"file-input\">"
+                        + "<span>Document (required)</span></label>"));
+                });
+    }
+}