Add research-focus tagline to author bio · default pt 4× for SOR

- AuthorToggle now shows a one-line research focus highlight under
  the role: "Focuses on robust perception, simultaneous localization
  and mapping (SLAM), and state estimation."
- PointCloudViewer accepts a defaultSizeMult prop. Lec07 (SOR) sets
  it to 4× since the inlier/outlier split is hard to read at 1×.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: LimHyungTae

web/src/components/AuthorToggle.tsx

@@ -29,6 +29,9 @@ export default function AuthorToggle() {
               {t.author.role}
             </span>
           </div>
+          <p className="mt-2 text-[12px] italic leading-relaxed text-[var(--accent)]">
+            {t.author.focus}
+          </p>
           <p className="mt-3 text-[13.5px] leading-relaxed text-[var(--dim)]">
             {t.author.bio}
           </p>

web/src/components/PointCloudViewer.tsx

@@ -28,15 +28,20 @@ type Props = {
   background?: string;
   /** Called with [x, y, z] when the user clicks a point in any layer. */
   onPick?: (xyz: [number, number, number]) => void;
+  /** Initial value of the pt-size slider (1× by default). Some demos
+   *  default points are too small to read at 1× (e.g. SOR), so the
+   *  caller can bump it. */
+  defaultSizeMult?: number;
 };
 
 export default function PointCloudViewer({
   layers,
   lines,
   background = "#0a0f1a",
   onPick,
+  defaultSizeMult = 1,
 }: Props) {
-  const [sizeMult, setSizeMult] = useState(1);
+  const [sizeMult, setSizeMult] = useState(defaultSizeMult);
   const { center, radius } = useMemo(() => unionBounds(layers), [layers]);
 
   const initialPos: [number, number, number] = [

web/src/i18n/locales/en.ts

@@ -34,6 +34,7 @@ export const en = {
     toggle: "How's Hyungtae Lim?",
     title: "Hyungtae Lim",
     role: "Postdoctoral Associate · MIT SPARK Lab",
+    focus: "Focuses on robust perception, simultaneous localization and mapping (SLAM), and state estimation.",
     bio: "Hyungtae Lim is a Postdoctoral Associate at MIT's SPARK Lab, working with Prof. Luca Carlone. He received his Ph.D. in Electrical Engineering from KAIST in 2023, advised by Prof. Hyun Myung. His research focuses on robust perception, state estimation, and lifelong mapping for mobile robots and autonomous vehicles. He is a recipient of the RSS Pioneers 2024 award and the 2022 IEEE RA-L Best Paper Award, an Associate Editor for IEEE RA-L, and the author of widely used open-source LiDAR-based libraries.",
     libsLabel: "Open-source libraries",
     libs: [

web/src/i18n/locales/ko.ts

@@ -36,6 +36,7 @@ export const ko: LocaleDict = {
     toggle: "How's Hyungtae Lim?",
     title: "임형태 (Hyungtae Lim)",
     role: "Postdoctoral Associate · MIT SPARK Lab",
+    focus: "Robust perception · simultaneous localization and mapping (SLAM) · state estimation 연구.",
     bio: "임형태는 MIT SPARK Lab에서 Luca Carlone 교수와 함께 일하는 Postdoctoral Associate입니다. 2023년 KAIST에서 명현 교수의 지도 하에 전기 및 전자공학 박사 학위를 받았습니다. 모바일 로봇과 자율주행을 위한 robust perception, state estimation, lifelong mapping을 연구합니다. RSS Pioneers 2024와 2022 IEEE RA-L Best Paper Award 수상자이며, IEEE RA-L Associate Editor로 활동 중입니다. 또한 널리 사용되는 LiDAR 기반 오픈소스 라이브러리들의 저자이기도 합니다.",
     libsLabel: "오픈소스 라이브러리",
     libs: [

web/src/pages/Lec07Sor.tsx

@@ -57,6 +57,7 @@ export default function Lec07Sor() {
           </div>
           <div className="aspect-[16/10] w-full">
             <PointCloudViewer
+              defaultSizeMult={4}
               layers={[
                 { cloud: result.inliers, color: "#34d399", size: ptSize },
                 { cloud: result.outliers, color: "#f87171", size: ptSize * 1.4 },