Add Ctrl+Shift+M hotkey for speech-to-text toggle

Lifts useSTT hook from SttButton into TerminalView so both the hotkey
and the button share the same recording state. The hotkey keeps terminal
focus so after transcription the user just presses Enter. The button
also no longer steals focus via onMouseDown preventDefault.

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

app/src/components/terminal/TerminalView.tsx

@@ -7,6 +7,7 @@ import { openUrl } from "@tauri-apps/plugin-opener";
 import "@xterm/xterm/css/xterm.css";
 import { useTerminal } from "../../hooks/useTerminal";
 import { useAppState } from "../../store/appState";
+import { useSTT } from "../../hooks/useSTT";
 import SttButton from "./SttButton";
 import { awsSsoRefresh } from "../../lib/tauri-commands";
 import { UrlDetector } from "../../lib/urlDetector";
@@ -27,6 +28,9 @@ export default function TerminalView({ sessionId, active }: Props) {
   const { sendInput, pasteImage, resize, onOutput, onExit } = useTerminal();
   const setTerminalHasSelection = useAppState(s => s.setTerminalHasSelection);
   const sttEnabled = useAppState(s => s.appSettings?.stt?.enabled);
+  const stt = useSTT(sessionId, sendInput);
+  const sttToggleRef = useRef(stt.toggle);
+  sttToggleRef.current = stt.toggle;
 
   const ssoBufferRef = useRef("");
   const ssoTriggeredRef = useRef(false);
@@ -102,6 +106,11 @@ export default function TerminalView({ sessionId, active }: Props) {
         }
         return false; // prevent xterm from processing this key
       }
+      // Ctrl+Shift+M toggles speech-to-text recording
+      if (event.type === "keydown" && event.ctrlKey && event.shiftKey && event.key === "M") {
+        sttToggleRef.current();
+        return false;
+      }
       return true;
     });
 
@@ -427,7 +436,7 @@ export default function TerminalView({ sessionId, active }: Props) {
         {isAutoFollow ? "▼ Following" : "▽ Paused"}
       </button>
       {/* STT mic button - bottom left */}
-      {sttEnabled && <SttButton sessionId={sessionId} sendInput={sendInput} />}
+      {sttEnabled && <SttButton state={stt.state} error={stt.error} onToggle={stt.toggle} onCancel={stt.cancelRecording} />}
       {/* Jump to Current - bottom right, when scrolled up */}
       {!isAtBottom && (
         <button