Start on live transcription and python sidecar (faster-whisper)

src/index.css

@@ -397,6 +397,61 @@ body {
   font-size: 0.9rem;
 }
 
+/* --- LiveControls (M7, D-016) --- */
+
+.live-controls {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+}
+
+.live-button {
+  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;
+  white-space: nowrap;
+}
+
+.live-button:hover:enabled {
+  border-color: var(--accent);
+}
+
+.live-button:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+
+.live-button-active,
+.live-button-active:hover:enabled {
+  border-color: #e0605e;
+}
+
+.live-dot {
+  flex-shrink: 0;
+  width: 0.6rem;
+  height: 0.6rem;
+  border-radius: 999px;
+  background: #e0605e;
+  animation: pulse 1.2s ease-in-out infinite;
+}
+
+@keyframes pulse {
+  50% {
+    opacity: 0.25;
+  }
+}
+
+.live-hint {
+  margin: 0;
+  color: var(--muted);
+  font-size: 0.9rem;
+}
+
 .file-name {
   margin: 0;
   color: var(--muted);
@@ -512,6 +567,13 @@ body {
   overflow-wrap: anywhere;
 }
 
+/* Live-mode text that may still change (D-016) — visually distinct from the
+   committed text it follows. */
+.transcript-tentative {
+  color: var(--muted);
+  font-style: italic;
+}
+
 .cursor {
   display: inline-block;
   width: 0.55em;