feat(web-ui): Create 탭 배치 생성 섹션 + BatchProgress 폴링

src/pages/music/MusicStudio.css

@@ -3417,3 +3417,116 @@
 .psm-keyword-main small {
     display: block; color: var(--ms-muted, #a0a0b0); font-size: 11px; margin-top: 4px;
 }
+
+/* === Batch Generation Section === */
+.ms-batch-section {
+    margin: 16px 0;
+    padding: 12px 16px;
+    background: rgba(0, 0, 0, 0.25);
+    border: 1px solid var(--ms-line, #2a2a3a);
+    border-radius: 12px;
+}
+.ms-batch-section summary {
+    cursor: pointer;
+    font-weight: 600;
+    color: var(--ms-text, #f0f0f5);
+    user-select: none;
+    padding: 4px 0;
+}
+.ms-batch-section[open] summary {
+    margin-bottom: 8px;
+}
+.ms-batch-form {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    padding: 12px 0;
+}
+.ms-batch-form label {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    font-size: 13px;
+    color: var(--ms-text, #f0f0f5);
+}
+.ms-batch-form select,
+.ms-batch-form input[type="range"] {
+    padding: 6px 8px;
+    background: rgba(255, 255, 255, 0.04);
+    border: 1px solid var(--ms-line, #2a2a3a);
+    border-radius: 6px;
+    color: var(--ms-text, #f0f0f5);
+}
+.ms-batch-form input[type="range"] {
+    padding: 0;
+    background: transparent;
+}
+.ms-batch-checkbox {
+    flex-direction: row !important;
+    align-items: center;
+    gap: 8px;
+}
+.ms-batch-checkbox input {
+    width: auto;
+    margin: 0;
+}
+.ms-batch-estimate {
+    font-size: 12px;
+    color: var(--ms-muted, #a0a0b0);
+    margin: 4px 0;
+}
+.ms-batch-form button {
+    padding: 8px 16px;
+    background: rgba(56, 189, 248, 0.2);
+    color: #bae6fd;
+    border: 1px solid rgba(56, 189, 248, 0.4);
+    border-radius: 8px;
+    cursor: pointer;
+    font-size: 13px;
+    font-weight: bold;
+    align-self: flex-start;
+}
+.ms-batch-form button:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
+.ms-batch-progress {
+    margin-top: 12px;
+    padding: 12px;
+    background: rgba(0, 0, 0, 0.35);
+    border-radius: 8px;
+    border: 1px solid var(--ms-line, #2a2a3a);
+}
+.ms-batch-header {
+    font-size: 13px;
+    margin-bottom: 8px;
+}
+.ms-batch-status--generating { color: var(--ms-accent, #38bdf8); }
+.ms-batch-status--compiling  { color: #fb923c; }
+.ms-batch-status--piped      { color: #86efac; }
+.ms-batch-status--failed     { color: #fca5a5; }
+.ms-batch-status--cancelled  { color: var(--ms-muted, #a0a0b0); }
+.ms-batch-tracks {
+    padding-left: 24px;
+    font-size: 12px;
+    margin: 8px 0;
+}
+.ms-batch-tracks li {
+    margin: 2px 0;
+}
+.ms-batch-tracks li.done {
+    color: #86efac;
+}
+.ms-batch-tracks li.current {
+    color: var(--ms-accent, #38bdf8);
+    font-weight: bold;
+}
+.ms-batch-tracks li.pending {
+    color: var(--ms-muted, #a0a0b0);
+}
+.ms-batch-link {
+    margin-top: 6px;
+    font-size: 12px;
+    color: var(--ms-muted, #a0a0b0);
+}