fix: full review pass (main process, voice pipeline, Hermes client, HUD) and e2e-validated local voice (v2.1.0.1)

Electron main
- utility-process channel: sherpa output copied into V8 buffers (Electron rejects external
  buffers), audio exchanged as base64; worker restart on timeout, identity-safe exit handling,
  deterministic native unload by restart
- webhook: loopback by default without secret, UTF-8-safe body assembly, clean restart, port validation
- files IPC: realpath-based root check, openPath allow-list (reveal-only outside document folders),
  Windows reserved names; store: debounced async atomic writes with backup of corrupt files;
  logger: streaming writes with rotation; log message size cap
- HTTP stream proxy: socket released on idle timeout / renderer destroyed, id validation
- model manager: inactivity timeout, retrying rm/rename (Windows locks), engine stopped before
  replacing a model; WAV decoder handles float/24-bit; IPC payload validation
- window: opaque rounded window on Windows, navigation lock-down, visibility events;
  Ctrl+Alt+Escape instead of the Task Manager shortcut; single-instance guard; EVEFLOW_USER_DATA

Voice pipeline
- abort semantics (SendHandle.aborted), abort before the stream opens, session id prefixes per transport
- hands-free re-arm after replies without speech, start/stop race, no chime on auto re-arm,
  no silence shipped to STT (400 ms pre-roll), no transcription of empty manual stops
- TTS: bounded prefetch, cancellable segments, non-interrupting notices, volume applied at play time
- SSE CRLF split, usage in chat completions, finish_reason length, phonetic regex hoisted

HUD
- core renderer: no canvas shadows, cached colours, reusable spectrum buffer, theme read on change,
  30 fps idle, stops when the window is hidden; ping flashes on send / tool / speech
- deltas coalesced per animation frame; stable auto-scroll; narrow selectors everywhere
- bundled fonts (offline), reduce-motion fix, error toasts, ops drawer below 1180 px,
  interim transcript and first-token latency in the core caption, Ctrl+K, dialog semantics,
  switch/aria roles, compact widget cleanup, Whisper small recommended for French
- docs/ROADMAP.md: audit results, e2e results and the plan towards a real JARVIS

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Wn5VX9HNbJ7N54hR24u9Y

src/components/chat/ChatPanel.tsx

@@ -12,18 +12,36 @@ interface Props {
 export function ChatPanel({ compact }: Props) {
   const messages = useChat((s) => s.messages);
   const clear = useChat((s) => s.clear);
-  const settings = useSettings((s) => s.settings);
+  const assistantName = useSettings((s) => s.settings.assistantName);
+  const userName = useSettings((s) => s.settings.userName);
+  const showReasoning = useSettings((s) => s.settings.ui.showReasoning);
   const listRef = useRef<HTMLDivElement>(null);
+  const programmatic = useRef(false);
   const [zoom, setZoom] = useState<string | null>(null);
   const [stick, setStick] = useState(true);
 
   useEffect(() => {
     if (!stick) return;
     const el = listRef.current;
-    if (el) el.scrollTop = el.scrollHeight;
+    if (!el) return;
+    programmatic.current = true;
+    el.scrollTop = el.scrollHeight;
   }, [messages, stick]);
 
+  useEffect(() => {
+    if (!zoom) return;
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') setZoom(null);
+    };
+    window.addEventListener('keydown', onKey);
+    return () => window.removeEventListener('keydown', onKey);
+  }, [zoom]);
+
   const onScroll = () => {
+    if (programmatic.current) {
+      programmatic.current = false;
+      return;
+    }
     const el = listRef.current;
     if (!el) return;
     setStick(el.scrollHeight - el.scrollTop - el.clientHeight < 80);
@@ -47,7 +65,7 @@ export function ChatPanel({ compact }: Props) {
       <div ref={listRef} className={`chat-list${compact ? ' compact' : ''}`} onScroll={onScroll}>
         {visible.length === 0 && (
           <div className="empty">
-            {compact ? 'En attente…' : `Canal ouvert. Parlez ou écrivez à ${settings.assistantName}.`}
+            {compact ? 'En attente…' : `Canal ouvert. Parlez ou écrivez à ${assistantName}.`}
             {!compact && (
               <div className="muted" style={{ marginTop: 8, fontSize: 12 }}>
                 <span className="kbd">Ctrl</span> + <span className="kbd">Shift</span> + <span className="kbd">Espace</span> active le micro depuis n’importe où.
@@ -59,9 +77,9 @@ export function ChatPanel({ compact }: Props) {
           <MessageBubble
             key={m.id}
             message={m}
-            assistantName={settings.assistantName}
-            userName={settings.userName}
-            showReasoning={settings.ui.showReasoning}
+            assistantName={assistantName}
+            userName={userName}
+            showReasoning={showReasoning}
             compact={compact}
             onOpenImage={setZoom}
           />