feat: add recent plays history modal

- GET /api/me/recent endpoint returning last 50 play events with track
  and artist info
- RecentPlays modal component with time-ago display
- "Recent plays" button in user dropdown menu
- Clicking a track in history starts playback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

furumi-node-player/client/src/components/header/header.module.css

@@ -108,4 +108,127 @@
 
 .userLogout:hover {
     background: var(--bg-hover);
+}
+
+.userAction {
+    display: block;
+    padding: 10px 16px;
+    color: var(--text);
+    text-decoration: none;
+    font-size: 0.85rem;
+    font-weight: 500;
+    cursor: pointer;
+    background: none;
+    border: none;
+    width: 100%;
+    text-align: left;
+    transition: background 0.15s;
+}
+
+.userAction:hover {
+    background: var(--bg-hover);
+}
+
+/* Recent plays overlay */
+
+.recentOverlay {
+    position: fixed;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 200;
+    display: grid;
+    place-items: center;
+    animation: fadeIn 0.15s ease;
+}
+
+.recentPanel {
+    width: min(480px, 90vw);
+    max-height: 70vh;
+    background: var(--bg-panel);
+    border: 1px solid var(--border);
+    border-radius: 14px;
+    display: flex;
+    flex-direction: column;
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
+}
+
+.recentHeader {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 16px 20px;
+    border-bottom: 1px solid var(--border);
+}
+
+.recentHeader h2 {
+    font-size: 1rem;
+    font-weight: 600;
+    color: var(--text);
+    margin: 0;
+}
+
+.recentClose {
+    background: none;
+    border: none;
+    color: var(--text-muted);
+    font-size: 1rem;
+    cursor: pointer;
+    padding: 4px 8px;
+    border-radius: 4px;
+}
+
+.recentClose:hover {
+    color: var(--text);
+    background: var(--bg-hover);
+}
+
+.recentList {
+    overflow-y: auto;
+    flex: 1;
+}
+
+.recentItem {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 20px;
+    cursor: pointer;
+    transition: background 0.15s;
+}
+
+.recentItem:hover {
+    background: var(--bg-hover);
+}
+
+.recentTrack {
+    min-width: 0;
+    flex: 1;
+}
+
+.recentTitle {
+    font-size: 0.85rem;
+    color: var(--text);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.recentArtist {
+    font-size: 0.75rem;
+    color: var(--text-muted);
+    margin-top: 1px;
+}
+
+.recentTime {
+    font-size: 0.7rem;
+    color: var(--text-dim);
+    flex-shrink: 0;
+    margin-left: 12px;
+}
+
+.recentEmpty {
+    padding: 32px 20px;
+    text-align: center;
+    color: var(--text-muted);
+    font-size: 0.85rem;
 }