You are helping me modify a vibe-coded widget from itjustvibes.com.

[VIBE CODE: "Live Room Whiteboard" by @Owner]
Source: https://itjustvibes.com/Owner/live-room-whiteboard
Type: React/JSX

--- SOURCE CODE ---
```jsx
function Widget() {
  const STORE_KEY = 'liveRoomWhiteboard:v1';
  const DEFAULT_ROOM = 'studio';
  const BOARD_WIDTH = 1000;
  const BOARD_HEIGHT = 620;
  const MAX_STROKES = 72;
  const MAX_POINTS = 48;
  const MAX_CURSORS = 6;
  const CURSOR_TTL = 6000;
  const PALETTE = [
    { id: 'ink', color: '#1f2937', label: 'Ink' },
    { id: 'blue', color: '#2563eb', label: 'Blue' },
    { id: 'coral', color: '#ea580c', label: 'Coral' },
    { id: 'mint', color: '#059669', label: 'Mint' },
  ];

  const memoryRoomRef = React.useRef(createRoomState(DEFAULT_ROOM));
  const sharedRoomRef = React.useRef(memoryRoomRef.current);
  const profileRef = React.useRef(createProfile({}));
  const draftStrokeRef = React.useRef(null);
  const lastCursorPublishRef = React.useRef(0);

  const [ready, setReady] = React.useState(false);
  const [profile, setProfile] = React.useState(profileRef.current);
  const [roomInput, setRoomInput] = React.useState(DEFAULT_ROOM);
  const [roomState, setRoomState] = React.useState(memoryRoomRef.current);
  const [notice, setNotice] = React.useState('Loading board...');

  function normalizeRoomId(value) {
    const cleaned = String(value || '')
      .toLowerCase()
      .replace(/[^a-z0-9-]/g, '-')
      .replace(/-+/g, '-')
      .replace(/^-|-$/g, '')
      .slice(0, 18);
    return cleaned || DEFAULT_ROOM;
  }

  function randomId(prefix) {
    return `${prefix}-${Math.random().toString(36).slice(2, 8)}`;
  }

  function createProfile(saved) {
    const color = PALETTE.some((item) => item.color === saved?.color) ? saved.color : PALETTE[0].color;
    const tool = saved?.tool === 'erase' ? 'erase' : 'pen';
    return {
      displayName:
        typeof saved?.displayName === 'string' && saved.displayName.trim()
          ? saved.displayName.trim().slice(0, 22)
          : 'Marker Friend',
      userId:
        typeof saved?.userId === 'string' && saved.userId
          ? saved.userId.slice(0, 40)
          : randomId('drawer'),
      roomId: normalizeRoomId(saved?.roomId || DEFAULT_ROOM),
      color,
      tool,
    };
  }

  function createRoomState(roomId) {
    return {
      roomId: normalizeRoomId(roomId),
      revision: Date.now(),
      strokes: [],
      cursors: {},
      clearedAt: 0,
      updatedAt: Date.now(),
    };
  }

  function clamp(value, min, max) {
    return Math.max(min, Math.min(max, value));
  }

  function normalizePoint(x, y) {
    return [
      Math.round(clamp(x, 0, 1) * BOARD_WIDTH),
      Math.round(clamp(y, 0, 1) * BOARD_HEIGHT),
    ];
  }

  function formatPath(points) {
    if (!points.length) return '';
    return points
      .map((point, index) => `${index === 0 ? 'M' : 'L'} ${point[0]} ${point[1]}`)
      .join(' ');
  }

  function pointsEqual(a, b) {
    return !!a && !!b && a[0] === b[0] && a[1] === b[1];
  }

  function appendPoint(points, nextPoint) {
    const last = points[points.length - 1];
    if (last && pointsEqual(last, nextPoint)) {
      return points;
    }
    return [...points, nextPoint].slice(-MAX_POINTS);
  }

  function mergeStrokes(base, incoming) {
    const merged = new Map();
    [...(base || []), ...(incoming || [])].forEach((stroke) => {
      if (!stroke || typeof stroke.id !== 'string') return;
      merged.set(stroke.id, sanitizeStroke(stroke));
    });
    return [...merged.values()]
      .sort((a, b) => a.createdAt - b.createdAt)
      .slice(-MAX_STROKES);
  }

  function sanitizeStroke(stroke) {
    const tool = stroke?.tool === 'erase' ? 'erase' : 'pen';
    const color = PALETTE.some((item) => item.color === stroke?.color) ? stroke.color : PALETTE[0].color;
    const size = clamp(Number(stroke?.size) || (tool === 'erase' ? 26 : 4), 2, 36);
    const points = Array.isArray(stroke?.points)
      ? stroke.points
          .filter((point) => Array.isArray(point) && point.length === 2)
          .map((point) => [
            clamp(Math.round(Number(point[0]) || 0), 0, BOARD_WIDTH),
            clamp(Math.round(Number(point[1]) || 0), 0, BOARD_HEIGHT),
          ])
          .slice(0, MAX_POINTS)
      : [];
    return {
      id: typeof stroke?.id === 'string' ? stroke.id.slice(0, 64) : randomId('stroke'),
      userId: typeof stroke?.userId === 'string' ? stroke.userId.slice(0, 40) : 'guest',
      color,
      tool,
      size,
      points,
      createdAt: Number(stroke?.createdAt) || Date.now(),
    };
  }

  function sanitizeCursors(nextCursors) {
    const now = Date.now();
    const entries = Object.entries(nextCursors || {})
      .filter(([, cursor]) => cursor && typeof cursor === 'object')
      .map(([userId, cursor]) => [
        userId.slice(0, 40),
        {
          name:
            typeof cursor.name === 'string' && cursor.name.trim()
              ? cursor.name.trim().slice(0, 22)
              : 'Guest',
          color: PALETTE.some((item) => item.color === cursor.color) ? cursor.color : PALETTE[0].color,
          x: clamp(Math.round(Number(cursor.x) || 0), 0, BOARD_WIDTH),
          y: clamp(Math.round(Number(cursor.y) || 0), 0, BOARD_HEIGHT),
          activeAt: Number(cursor.activeAt) || now,
        },
      ])
      .filter(([, cursor]) => now - cursor.activeAt < CURSOR_TTL)
      .sort((a, b) => b[1].activeAt - a[1].activeAt)
      .slice(0, MAX_CURSORS);
    return Object.fromEntries(entries);
  }

  function sanitizeRoomState(nextState, fallbackRoomId) {
    const roomId = normalizeRoomId(nextState?.roomId || fallbackRoomId || DEFAULT_ROOM);
    const strokes = Array.isArray(nextState?.strokes)
      ? nextState.strokes.map(sanitizeStroke).filter((stroke) => stroke.points.length > 0).slice(-MAX_STROKES)
      : [];
    return {
      roomId,
      revision: Number(nextState?.revision) || Date.now(),
      strokes,
      cursors: sanitizeCursors(nextState?.cursors),
      clearedAt: Number(nextState?.clearedAt) || 0,
      updatedAt: Number(nextState?.updatedAt) || Date.now(),
    };
  }

  function buildRoomUpdate(patch) {
    const base = sharedRoomRef.current && sharedRoomRef.current.roomId === profileRef.current.roomId
      ? sharedRoomRef.current
      : memoryRoomRef.current;
    const nextState = sanitizeRoomState(
      {
        ...base,
        ...patch,
        roomId: profileRef.current.roomId,
        strokes: patch?.strokes ? mergeStrokes(base.strokes, patch.strokes) : base.strokes,
        cursors: patch?.cursors ? { ...base.cursors, ...patch.cursors } : base.cursors,
        revision: Date.now(),
        updatedAt: Date.now(),
      },
      profileRef.current.roomId
    );
    return nextState;
  }

  function publishRoom(nextState) {
    const safeState = sanitizeRoomState(nextState, profileRef.current.roomId);
    sharedRoomRef.current = safeState;
    memoryRoomRef.current = safeState;
    setRoomState(safeState);
    const api = window.jankbank;
    if (api && api.shared && typeof api.shared.set === 'function') {
      api.shared.set(safeState);
    }
  }

  async function saveProfile(nextProfile) {
    const safeProfile = createProfile(nextProfile);
    profileRef.current = safeProfile;
    setProfile(safeProfile);
    setRoomInput(safeProfile.roomId);
    const api = window.jankbank;
    if (api && typeof api.save === 'function') {
      await api.save(STORE_KEY, safeProfile);
    }
  }

  function getPointerPoint(event) {
    const svg = event.currentTarget;
    const rect = svg.getBoundingClientRect();
    if (!rect.width || !rect.height) return [0, 0];
    const x = (event.clientX - rect.left) / rect.width;
    const y = (event.clientY - rect.top) / rect.height;
    return normalizePoint(x, y);
  }

  function updateCursor(point) {
    const now = Date.now();
    if (now - lastCursorPublishRef.current < 40) return;
    lastCursorPublishRef.current = now;
    const nextRoom = buildRoomUpdate({
      cursors: {
        [profile.userId]: {
          name: profile.displayName,
          color: profile.color,
          x: point[0],
          y: point[1],
          activeAt: now,
        },
      },
    });
    publishRoom(nextRoom);
  }

  function handlePointerDown(event) {
    const point = getPointerPoint(event);
    draftStrokeRef.current = {
      id: randomId('stroke'),
      userId: profile.userId,
      tool: profile.tool,
      color: profile.color,
      size: profile.tool === 'erase' ? 26 : 4,
      points: [point],
      createdAt: Date.now(),
    };
    updateCursor(point);
  }

  function handlePointerMove(event) {
    const point = getPointerPoint(event);
    updateCursor(point);
    const draft = draftStrokeRef.current;
    if (!draft) return;
    draft.points = appendPoint(draft.points, point);
    draftStrokeRef.current = draft;
    setRoomState((current) => ({
      ...current,
      cursors: {
        ...current.cursors,
        [profile.userId]: {
          name: profile.displayName,
          color: profile.color,
          x: point[0],
          y: point[1],
          activeAt: Date.now(),
        },
      },
    }));
  }

  function finishStroke() {
    const draft = draftStrokeRef.current;
    draftStrokeRef.current = null;
    if (!draft || draft.points.length === 0) return;
    const nextRoom = buildRoomUpdate({
      strokes: [draft],
      cursors: {
        [profile.userId]: {
          name: profile.displayName,
          color: profile.color,
          x: draft.points[draft.points.length - 1][0],
          y: draft.points[draft.points.length - 1][1],
          activeAt: Date.now(),
        },
      },
    });
    publishRoom(nextRoom);
  }

  async function joinRoom(nextRoomId) {
    const normalized = normalizeRoomId(nextRoomId);
    await saveProfile({
      ...profileRef.current,
      roomId: normalized,
    });
    const candidate =
      sharedRoomRef.current && sharedRoomRef.current.roomId === normalized
        ? sharedRoomRef.current
        : createRoomState(normalized);
    publishRoom(candidate);
    setNotice(`Joined ${normalized}.`);
  }

  async function setDisplayName(value) {
    await saveProfile({
      ...profileRef.current,
      displayName: value.slice(0, 22),
    });
  }

  async function setTool(tool) {
    await saveProfile({
      ...profileRef.current,
      tool,
    });
  }

  async function setColor(color) {
    await saveProfile({
      ...profileRef.current,
      color,
      tool: 'pen',
    });
  }

  function clearBoard() {
    const nextRoom = sanitizeRoomState(
      {
        roomId: profile.roomId,
        revision: Date.now(),
        strokes: [],
        cursors: {
          ...roomState.cursors,
          [profile.userId]: {
            name: profile.displayName,
            color: profile.color,
            x: 120,
            y: 120,
            activeAt: Date.now(),
          },
        },
        clearedAt: Date.now(),
        updatedAt: Date.now(),
      },
      profile.roomId
    );
    publishRoom(nextRoom);
    setNotice('Board cleared for a fresh sketch.');
  }

  React.useEffect(() => {
    profileRef.current = profile;
  }, [profile]);

  React.useEffect(() => {
    let cancelled = false;
    const initialRoom = createRoomState(DEFAULT_ROOM);
    memoryRoomRef.current = initialRoom;
    sharedRoomRef.current = initialRoom;
    setRoomState(initialRoom);

    const api = window.jankbank;
    const shared = api && api.shared ? api.shared : null;
    if (shared && typeof shared.onChange === 'function') {
      shared.onChange((nextState) => {
        if (cancelled || !nextState) return;
        const safeState = sanitizeRoomState(nextState, profileRef.current.roomId);
        sharedRoomRef.current = safeState;
        if (safeState.roomId === profileRef.current.roomId) {
          setRoomState(safeState);
        }
      });
    }

    if (!api || typeof api.onReady !== 'function') {
      setReady(true);
      setNotice('Local demo mode active. Shared sync unavailable.');
      return () => {
        cancelled = true;
      };
    }

    api.onReady(async () => {
      const saved = await api.load(STORE_KEY);
      if (cancelled) return;
      const nextProfile = createProfile(saved || {});
      profileRef.current = nextProfile;
      setProfile(nextProfile);
      setRoomInput(nextProfile.roomId);
      const nextRoom =
        sharedRoomRef.current && sharedRoomRef.current.roomId === nextProfile.roomId
          ? sharedRoomRef.current
          : createRoomState(nextProfile.roomId);
      memoryRoomRef.current = nextRoom;
      sharedRoomRef.current = nextRoom;
      setRoomState(nextRoom);
      setReady(true);
      setNotice(
        shared && typeof shared.set === 'function'
          ? `Shared room sync ready in ${nextProfile.roomId}.`
          : 'Profile restored. Shared sync unavailable, using local mode.'
      );
    });

    return () => {
      cancelled = true;
    };
  }, []);

  React.useEffect(() => {
    if (!ready) return;
    if (roomState.roomId === profile.roomId) return;
    const nextRoom =
      sharedRoomRef.current && sharedRoomRef.current.roomId === profile.roomId
        ? sharedRoomRef.current
        : createRoomState(profile.roomId);
    publishRoom(nextRoom);
  }, [profile.roomId, ready]);

  const previewStroke = draftStrokeRef.current;
  const renderedStrokes = previewStroke ? [...roomState.strokes, previewStroke] : roomState.strokes;
  const visibleCursors = Object.entries(roomState.cursors || {})
    .filter(([, cursor]) => Date.now() - cursor.activeAt < CURSOR_TTL)
    .slice(0, MAX_CURSORS);
  const sharedEnabled = !!(
    window.jankbank &&
    window.jankbank.shared &&
    typeof window.jankbank.shared.set === 'function'
  );

  return (
    <main className="min-h-screen bg-[radial-gradient(circle_at_top,_rgba(14,165,233,0.16),_transparent_32%),linear-gradient(180deg,#0f172a_0%,#172554_44%,#111827_100%)] p-4 text-slate-100">
      <section className="mx-auto flex max-w-md flex-col gap-4 rounded-[28px] border border-white/10 bg-slate-950/55 p-4 shadow-[0_24px_70px_rgba(15,23,42,0.48)] backdrop-blur">
        <header className="rounded-[26px] border border-sky-200/15 bg-[linear-gradient(135deg,rgba(250,245,235,0.96),rgba(224,242,254,0.88),rgba(253,230,138,0.84))] p-4 text-slate-900">
          <div className="flex items-start justify-between gap-3">
            <div>
              <p className="text-[10px] font-black uppercase tracking-[0.32em] text-sky-700">Shared Sketch Room</p>
              <h1 className="text-3xl font-black tracking-tight">Live Room Whiteboard</h1>
              <p className="mt-1 max-w-xs text-sm text-slate-700">
                Tiny same-room drawing with live cursors, quick erasing, and no setup ceremony.
              </p>
            </div>
            <div className="rounded-2xl border border-slate-900/10 bg-white/70 px-3 py-2 text-right">
              <p className="text-[10px] uppercase tracking-[0.24em] text-slate-500">Mode</p>
              <p className="text-sm font-black text-slate-900">{sharedEnabled ? 'Shared' : 'Local'}</p>
            </div>
          </div>
          <div className="mt-4 grid grid-cols-3 gap-2">
            <div className="rounded-2xl bg-slate-900/6 p-3">
              <p className="text-[10px] uppercase tracking-[0.2em] text-slate-500">Room</p>
              <p className="mt-1 text-sm font-black">{profile.roomId}</p>
            </div>
            <div className="rounded-2xl bg-slate-900/6 p-3">
              <p className="text-[10px] uppercase tracking-[0.2em] text-slate-500">Strokes</p>
              <p className="mt-1 text-sm font-black">{roomState.strokes.length}</p>
            </div>
            <div className="rounded-2xl bg-slate-900/6 p-3">
              <p className="text-[10px] uppercase tracking-[0.2em] text-slate-500">People</p>
              <p className="mt-1 text-sm font-black">{visibleCursors.length || 1}</p>
            </div>
          </div>
        </header>

        <section className="grid grid-cols-2 gap-3">
          <label className="col-span-2 flex flex-col gap-2 rounded-2xl border border-white/10 bg-white/5 p-3">
            <span className="text-[11px] font-bold uppercase tracking-[0.2em] text-slate-400">Display Name</span>
            <input
              value={profile.displayName}
              onChange={(event) => setDisplayName(event.target.value)}
              className="rounded-xl border border-white/10 bg-slate-950/50 px-3 py-2 text-sm text-white outline-none focus:border-sky-300"
              placeholder="Marker Friend"
            />
          </label>
          <label className="col-span-2 flex flex-col gap-2 rounded-2xl border border-white/10 bg-white/5 p-3">
            <span className="text-[11px] font-bold uppercase tracking-[0.2em] text-slate-400">Room Code</span>
            <div className="flex gap-2">
              <input
                value={roomInput}
                onChange={(event) => setRoomInput(normalizeRoomId(event.target.value))}
                className="min-w-0 flex-1 rounded-xl border border-white/10 bg-slate-950/50 px-3 py-2 text-sm text-white outline-none focus:border-amber-300"
                placeholder="studio"
              />
              <button
                type="button"
                onClick={() => joinRoom(roomInput)}
                className="rounded-xl bg-amber-300 px-3 py-2 text-xs font-black uppercase tracking-[0.16em] text-slate-950"
              >
                Join
              </button>
            </div>
          </label>
        </section>

        <section className="rounded-[26px] border border-white/10 bg-white/5 p-4">
          <div className="flex flex-wrap items-center gap-2">
            <button
              type="button"
              onClick={() => setTool('pen')}
              className={`rounded-full px-3 py-2 text-xs font-black uppercase tracking-[0.14em] ${
                profile.tool === 'pen' ? 'bg-sky-300 text-slate-950' : 'bg-white/8 text-white'
              }`}
            >
              Pen
            </button>
            <button
              type="button"
              onClick={() => setTool('erase')}
              className={`rounded-full px-3 py-2 text-xs font-black uppercase tracking-[0.14em] ${
                profile.tool === 'erase' ? 'bg-rose-300 text-slate-950' : 'bg-white/8 text-white'
              }`}
            >
              Eraser
            </button>
            <button
              type="button"
              onClick={clearBoard}
              className="rounded-full bg-white/8 px-3 py-2 text-xs font-black uppercase tracking-[0.14em] text-white"
            >
              Clear Board
            </button>
          </div>
          <div className="mt-3 flex flex-wrap gap-2">
            {PALETTE.map((swatch) => (
              <button
                key={swatch.id}
                type="button"
                onClick={() => setColor(swatch.color)}
                className={`flex items-center gap-2 rounded-full border px-3 py-2 text-xs font-bold ${
                  profile.color === swatch.color && profile.tool === 'pen'
                    ? 'border-white bg-white/12 text-white'
                    : 'border-white/10 bg-slate-950/40 text-slate-300'
                }`}
              >
                <span className="h-3 w-3 rounded-full" style={{ backgroundColor: swatch.color }} />
                {swatch.label}
              </button>
            ))}
          </div>
        </section>

        <section className="rounded-[28px] border border-white/10 bg-[#f9f7ef] p-3 shadow-[inset_0_1px_0_rgba(255,255,255,0.75)]">
          <div className="rounded-[22px] border border-slate-900/8 bg-white/70 p-2">
            <svg
              viewBox={`0 0 ${BOARD_WIDTH} ${BOARD_HEIGHT}`}
              className="aspect-[10/6] w-full touch-none overflow-hidden rounded-[18px] bg-[linear-gradient(180deg,#fffdf8_0%,#f4f1e6_100%)]"
              onPointerDown={handlePointerDown}
              onPointerMove={handlePointerMove}
              onPointerUp={finishStroke}
              onPointerLeave={finishStroke}
            >
              <defs>
                <pattern id="paper-grid" width="40" height="40" patternUnits="userSpaceOnUse">
                  <path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(148,163,184,0.18)" strokeWidth="1" />
                </pattern>
              </defs>
              <rect x="0" y="0" width={BOARD_WIDTH} height={BOARD_HEIGHT} fill="url(#paper-grid)" />
              {renderedStrokes.map((stroke) => (
                <path
                  key={stroke.id}
                  d={formatPath(stroke.points)}
                  fill="none"
                  stroke={stroke.tool === 'erase' ? '#f9f7ef' : stroke.color}
                  strokeWidth={stroke.size}
                  strokeLinecap="round"
                  strokeLinejoin="round"
                  opacity={stroke.tool === 'erase' ? 0.96 : 0.92}
                />
              ))}
              {visibleCursors.map(([userId, cursor]) => (
                <g key={userId} opacity={userId === profile.userId ? 0.9 : 0.78}>
                  <circle cx={cursor.x} cy={cursor.y} r="8" fill={cursor.color} />
                  <rect x={cursor.x + 12} y={cursor.y - 18} rx="8" ry="8" width="108" height="24" fill="rgba(15,23,42,0.78)" />
                  <text x={cursor.x + 22} y={cursor.y - 2} fill="#f8fafc" fontSize="12" fontWeight="700">
                    {cursor.name}
                  </text>
                </g>
              ))}
            </svg>
          </div>
          <p className="mt-3 text-xs text-slate-600">
            Draw with one finger or mouse. Eraser uses a fat paper-colored stroke to keep the shared payload simple.
          </p>
        </section>

        <section className="grid grid-cols-1 gap-3 sm:grid-cols-2">
          <article className="rounded-[24px] border border-white/10 bg-white/5 p-4">
            <p className="text-[10px] font-black uppercase tracking-[0.24em] text-slate-400">Live Presence</p>
            <div className="mt-3 flex flex-wrap gap-2">
              {visibleCursors.length === 0 ? (
                <p className="text-sm text-slate-500">No active cursors yet.</p>
              ) : (
                visibleCursors.map(([userId, cursor]) => (
                  <div key={userId} className="inline-flex items-center gap-2 rounded-full bg-slate-900/35 px-3 py-2 text-xs text-white">
                    <span className="h-2.5 w-2.5 rounded-full" style={{ backgroundColor: cursor.color }} />
                    <span className="font-bold">{cursor.name}</span>
                  </div>
                ))
              )}
            </div>
          </article>
          <article className="rounded-[24px] border border-white/10 bg-white/5 p-4">
            <p className="text-[10px] font-black uppercase tracking-[0.24em] text-slate-400">Board Notes</p>
            <ul className="mt-3 space-y-2 text-sm text-slate-300">
              <li>History stays capped at {MAX_STROKES} strokes.</li>
              <li>Each stroke keeps at most {MAX_POINTS} points.</li>
              <li>{sharedEnabled ? 'Shared sync is active for this room.' : 'This session is in local-only fallback mode.'}</li>
            </ul>
          </article>
        </section>

        <footer className="rounded-[22px] border border-white/10 bg-slate-950/30 p-3 text-xs text-slate-400">
          <p>{notice}</p>
        </footer>
      </section>
    </main>
  );
}
```

[REQUESTED CHANGES]
(no specific request — apply your best judgment)

--- HOW TO RESPOND (READ FIRST) ---

Before writing any code, follow this exact process:

1. **ANALYZE** the widget source code provided above and identify:
   a. Which Vibes SDK features it already uses (vibes.save, vibes.load, vibes.shared.join, etc.)
   b. Which SDK features would genuinely benefit THIS specific widget — tailored to what it does, not a dump of everything available.

2. **PRESENT A NUMBERED LIST** covering:
   - SDK features currently active in this widget
   - New SDK features that would concretely improve this widget (be specific: why this widget, what it enables)

3. **WAIT** — do not write any code yet. Reply with your analysis and numbered list, then stop and ask the user which numbered items they want.

4. **IMPLEMENT ONLY** the items the user confirms, plus any explicit change they requested. Do not add unrequested features.

**IMPORTANT — Shared state room names:**
If you add vibes.shared.join(), do NOT use a hardcoded string literal as the room name (e.g. vibes.shared.join("lobby")) unless the user explicitly wants ALL viewers to share one single global state. A hardcoded room name means every person who visits this widget reads and writes the same shared state — it is a global room. For per-user or per-session isolation, derive the room name from a variable (e.g. a user ID, session token, or random value). When in doubt, use vibes.save/vibes.load for per-user persistence instead.

--- VIBES SDK CONTEXT ---
## Vibes SDK Reference

You are building an HTML widget for It Just Vibes (itjustvibes.com). The Vibes SDK is auto-injected — do NOT add a script tag. Just use `window.vibes` (or just `vibes`).

### Setup

Wrap your startup code in `vibes.onReady`:

```js
vibes.onReady(async () => {
  const saved = await vibes.load("myKey");
  // your widget logic here
});
```

### State (Per-User Persistence)

Every user gets their own isolated state per widget. All methods return Promises.

| Method | Description |
|--------|-------------|
| `await vibes.save(key, value)` | Save JSON-serializable data |
| `await vibes.load(key)` | Load saved data (returns `null` if not found) |
| `await vibes.delete(key)` | Delete a saved key |
| `await vibes.listKeys()` | Get array of all saved key names |

**Key rules:**
- Keys are strings, max 64 characters, alphanumeric + dashes/underscores
- Values must be JSON-serializable (objects, arrays, strings, numbers, booleans)
- Max 100KB per value, 500KB per widget per user, 5MB per user total
- Max 100 keys per widget per user

### Fetch Proxy

Use direct `fetch()` for APIs with permissive CORS headers (`Access-Control-Allow-Origin: *`). Use `vibes.fetch` for APIs without CORS headers (the proxy handles cross-origin requests):

```js
const resp = await vibes.fetch("https://api.example.com/data", {
  method: "GET",         // GET, POST, PUT, DELETE
  headers: {},           // optional headers
  body: null,            // optional body (string)
  timeout: null          // optional timeout in ms
});
const data = await resp.json(); // or resp.text()
console.log(resp.status, resp.ok);
```

### Multiplayer (Shared State)

Real-time shared state across all users viewing the same widget.

```js
// Join a room (call once at startup)
await vibes.shared.join("lobby", { persistent: true });

// Set shared state (broadcasts to all users)
await vibes.shared.set("score", { player1: 10, player2: 7 });

// Read shared state (synchronous, returns last known value)
const score = vibes.shared.get("score");

// Listen for changes to a specific key
vibes.shared.onChange("score", (newValue) => {
  console.log("Score updated:", newValue);
});

// Listen for any shared state change
vibes.shared.onAny((key, value) => {
  console.log(key, "changed to", value);
});

// Get number of connected users
const count = await vibes.shared.getUserCount();

// Leave room
vibes.shared.leave();

// Clear all shared state for this room
await vibes.shared.clear();
```

**Shared state options:**
- `{ persistent: true }` — state survives page reloads (stored server-side)
- Default room name is "__default__" if omitted

### Rules

1. **Do NOT use localStorage, sessionStorage, or window.storage** — they are blocked or undefined in the sandbox. Use `vibes.save`/`vibes.load` instead.
2. **Do NOT add a script tag to import the SDK** — it is auto-injected.
3. **Wrap startup code in `vibes.onReady()`** — the SDK may not be ready immediately.
4. **Await all SDK calls** — every method (except `vibes.shared.get`) returns a Promise.
5. **Do NOT import external JS libraries via script tags** — they will be blocked. Include library code inline or use a CDN link in a `<link>` tag for CSS only.
6. **Keep total code under 80KB** — that is the default widget size limit (your account limit may be higher).

### Rate Limits

| Operation | Limit |
|-----------|-------|
| Writes (save + delete combined) | 30/min |
| Reads (load) | 60/min |
| List keys | 30/min |
| Fetch proxy | Rate limited per widget |

### Error Handling

All SDK methods can reject. Wrap in try/catch:

```js
try {
  await vibes.save("key", value);
} catch (err) {
  console.error("Save failed:", err.message);
}
```

Fetch proxy errors include `err.code`: `"RATE_LIMITED"`, `"BLOCKED"`, `"FETCH_ERROR"`.

### Data Export

Export rows of data as CSV or Excel directly from your widget.

```js
// Register dataset for the platform's "Export data" button
// AND optionally trigger an immediate download
vibes.exportData(rows, { filename: 'results.csv' })

// rows: Array of arrays (each inner array is one row; first row = headers)
// options.filename: sets the download filename and format (csv or xlsx)
// options.directDownload: false to only register without downloading (default: true)
```

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `filename` | string | `'data.csv'` | Download filename; extension determines format (`.csv` or `.xlsx`) |
| `directDownload` | boolean | `true` | Trigger immediate browser download in addition to registering the dataset |

**Notes:**
- First call registers the dataset so the widget chrome shows an "Export data" button
- Use `.csv` extension for CSV, `.xlsx` for Excel
- CSV injection safety is automatic (formula-starting cells prefixed with `'`)
- Data stays in the browser — no server round-trip


--- FORK & RESUBMIT INSTRUCTION ---
Return the complete, self-contained JSX file with all changes applied.
It should be ready to paste into itjustvibes.com/submit to create a new fork.
Include this comment at the top of the output:
/* Forked from: https://itjustvibes.com/Owner/live-room-whiteboard */