Transcript export (.txt/.srt) and model storage manager (M6)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/index.css

@@ -717,3 +717,103 @@ code {
     animation: none !important;
   }
 }
+
+/* --------------------------------------------------------------------------
+   Storage management panel (M6): cached models, per-model delete.
+   -------------------------------------------------------------------------- */
+
+.storage-manager {
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: 0.75rem 1rem;
+}
+
+.storage-manager summary {
+  cursor: pointer;
+  font-weight: 600;
+}
+
+.storage-total {
+  color: var(--muted);
+  font-weight: normal;
+  font-variant-numeric: tabular-nums;
+}
+
+.storage-hint {
+  margin: 0.5rem 0 0;
+  color: var(--muted);
+  font-size: 0.85rem;
+}
+
+.storage-list {
+  list-style: none;
+  margin: 0.75rem 0 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.storage-row {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+}
+
+.storage-model {
+  flex: 1 1 14rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.1rem;
+  min-width: 0;
+}
+
+.storage-name {
+  font-size: 0.95rem;
+}
+
+.storage-id {
+  font-size: 0.75rem;
+  color: var(--muted);
+  background: transparent;
+  padding: 0;
+  overflow-wrap: anywhere;
+}
+
+.storage-size {
+  color: var(--muted);
+  font-size: 0.85rem;
+  font-variant-numeric: tabular-nums;
+  white-space: nowrap;
+}
+
+.storage-delete {
+  border: 1px solid var(--border);
+  background: transparent;
+  color: inherit;
+  border-radius: 8px;
+  padding: 0.3rem 0.9rem;
+  font-size: 0.85rem;
+  cursor: pointer;
+  transition: border-color 0.15s, color 0.15s;
+}
+
+.storage-delete:hover:enabled {
+  border-color: #8b3a3a;
+  color: #f2b8b5;
+}
+
+.storage-delete:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+
+/* --- Transcript export (M6) — .txt/.srt buttons grouped with Copy --- */
+
+.transcript-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}