fix(app): settings review — startup theme default, slider/shell input UX, dedupe accents, memoize palette

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/TerminalView.tsx

@@ -103,10 +103,7 @@ export function TerminalView({ surfaceId, font, palette }: { surfaceId: string;
   }, [surfaceId]); // eslint-disable-line react-hooks/exhaustive-deps
 
   // Live re-apply font and theme when config changes without remounting.
-  // palette is a new object each render so we depend on a stable key instead.
-  const paletteKey = palette
-    ? `${palette["bg-panel"]}|${palette["text-primary"]}|${palette["search-match"]}`
-    : null;
+  // font and palette are memoized in App.tsx so stable identity = no spurious re-applies.
   useEffect(() => {
     const t = termRef.current;
     if (!t) return;
@@ -116,7 +113,7 @@ export function TerminalView({ surfaceId, font, palette }: { surfaceId: string;
     }
     if (palette) t.options.theme = xtermTheme(palette);
     requestAnimationFrame(() => { try { fitRef.current?.fit(); } catch { /* ignore */ } });
-  }, [font?.family, font?.size, paletteKey]); // eslint-disable-line react-hooks/exhaustive-deps
+  }, [font, palette]); // eslint-disable-line react-hooks/exhaustive-deps
 
   return <div ref={ref} style={{ width: "100%", height: "100%" }} />;
 }