🎨 Palette: 개선된 파일 업로드 버튼 UX 적용

.jules/palette.md

@@ -65,3 +65,7 @@
 ## 2025-02-18 - Search Input Escape Key
 **Learning:** Users who heavily rely on keyboard navigation (and power users) experience friction when forced to backspace manually or switch to the mouse to click a "Clear" button after filtering a list.
 **Action:** Always provide an `Escape` key listener on search inputs to instantly clear the query and re-render the view, matching native OS text field behavior.
+
+## 2024-08-12 - Proxy native file inputs for consistent UX
+**Learning:** In single-page applications, browsers natively suppress `change` events on `<input type="file">` if the user selects the same file path sequentially. Additionally, native file inputs have inconsistent cross-browser styling.
+**Action:** Visually hide the native `<input type="file">` (using `sr-only`, `tabindex="-1"`, and `aria-hidden="true"`) and use a styled proxy `<button>` with an explicit click event listener to trigger the hidden file input. This allows complete styling control and fixes same-file selection issues when combined with clearing the input value after `change`.

scanner/dashboard/index.html

@@ -92,7 +92,8 @@
   <span class="logo"></span><span class="brand">AppGuardrail</span>
   <span class="spacer"></span>
   <span class="meta" id="src">no findings loaded</span>
-  <input type="file" id="file" accept="application/json,.json" aria-label="Upload findings file" style="margin-left:12px">
+  <button type="button" id="header-browse" class="tag" style="margin-left:12px; cursor:pointer; color:var(--text); font-size:12px">Upload findings</button>
+  <input type="file" id="file" accept="application/json,.json" class="sr-only" tabindex="-1" aria-hidden="true">
 </header>
 <p id="findings-summary" class="sr-only" role="status" aria-live="polite" aria-atomic="true"></p>
 <main id="app"></main>
@@ -320,6 +321,7 @@ <h1>Dashboard</h1>
 }
 
 const fileInput = document.getElementById('file');
+document.getElementById('header-browse').addEventListener('click', () => fileInput.click());
 fileInput.addEventListener('change', () => {
   const selectedFile = fileInput.files?.[0];
   fileInput.value = '';

tests/test_dashboard_core.py

@@ -66,13 +66,23 @@ def test_dashboard_rows_are_keyboard_accessible():
     assert 'tabindex="0" role="button"' in html
     assert 'title="View details for finding"' in html
     assert "tbody tr:focus-visible" in html
-    assert "aria-label=\"Upload findings file\"" in html
     assert "aria-label=\"Search findings\"" in html
     assert "aria-label=\"Filter by severity\"" in html
     assert "tr.addEventListener('keydown'" in html
     assert "e.key === 'Enter' || e.key === ' '" in html
 
 
+def test_dashboard_upload_proxy_preserves_accessible_file_selection_contract():
+    """The styled upload control must remain a real button wired to the hidden input."""
+    html = dashboard_index_path().read_text(encoding="utf-8")
+
+    assert '<button type="button" id="header-browse"' in html
+    assert 'id="file" accept="application/json,.json" class="sr-only"' in html
+    assert 'tabindex="-1" aria-hidden="true"' in html
+    assert "document.getElementById('header-browse').addEventListener('click'" in html
+    assert "fileInput.value = '';" in html
+
+
 def test_dashboard_escapes_severity_in_innerhtml():
     """Severity chips must go through esc() — findings JSON is untrusted input."""
     html = dashboard_index_path().read_text(encoding="utf-8")