Landscape: whole-app landscape-first + Home 2-column landscape layout

- Move orientation lock + RotatePrompt to app root → whole app is landscape-
  first now (UNO-style), not just the game. Generalized rotate copy.
- Home: portrait unchanged; in landscape it becomes a 2-column app layout
  (col A = branding + play actions, col B = tiles + footer) that fits the
  short height with no scroll (landscape: Tailwind variants, overflow-hidden).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/screens/GameScreen.tsx

@@ -5,7 +5,6 @@ import { useEffect, useRef, useState } from "react";
 import { GameTable } from "@/components/GameTable";
 import { PostMatchRewardsModal } from "@/components/online/PostMatchRewardsModal";
 import { MatchIntroOverlay } from "@/components/online/MatchIntroOverlay";
-import { RotatePrompt } from "@/components/online/RotatePrompt";
 import { useGameStore } from "@/lib/game-store";
 import { useSessionStore } from "@/lib/session-store";
 import { useUIStore } from "@/lib/ui-store";
@@ -59,20 +58,6 @@ export function GameScreen() {
     };
   }, []);
 
-  // Landscape-first table: best-effort lock to landscape on Android/PWA (iOS &
-  // desktop reject it — harmless). Restored to portrait/auto when leaving.
-  useEffect(() => {
-    const o = (screen as unknown as { orientation?: { lock?: (m: string) => Promise<void>; unlock?: () => void } }).orientation;
-    o?.lock?.("landscape").catch(() => {});
-    return () => {
-      try {
-        o?.unlock?.();
-      } catch {
-        /* unsupported — ignore */
-      }
-    };
-  }, []);
-
   const notifyAchievements = (r: RewardResult) => {
     for (const a of r.newAchievements)
       pushNotification({
@@ -157,9 +142,6 @@ export function GameScreen() {
         onForfeit={canForfeit ? () => useGameStore.getState().forfeit() : undefined}
       />
 
-      {/* Landscape-first: nudge to rotate when held in portrait on a phone */}
-      <RotatePrompt />
-
       {/* UNO-style "players joining the table" intro (online matches, once) */}
       <AnimatePresence>
         {introPending && mode === "online" && (