feat: add boot screen with apple logo and progress bar

src/components/BootScreen/BootScreen.css

@@ -0,0 +1,38 @@
+.boot-screen {
+  position: fixed;
+  inset: 0;
+  background: #000;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 48px;
+  z-index: 9999;
+}
+
+.boot-logo {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.boot-apple {
+  width: 80px;
+  height: 80px;
+  fill: #fff;
+}
+
+.boot-progress-track {
+  width: 200px;
+  height: 3px;
+  background: rgba(255,255,255,0.15);
+  border-radius: 2px;
+  overflow: hidden;
+}
+
+.boot-progress-bar {
+  height: 100%;
+  background: #fff;
+  border-radius: 2px;
+  transition: width 0.05s linear;
+}

src/components/BootScreen/BootScreen.tsx

@@ -1 +1,54 @@
-export default function BootScreen({ onComplete }: { onComplete: () => void }) { return <div onClick={onComplete}>Loading...</div>; }
+import { useEffect, useRef, useState } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+import './BootScreen.css';
+
+interface Props {
+  onComplete: () => void;
+}
+
+export default function BootScreen({ onComplete }: Props) {
+  const [progress, setProgress] = useState(0);
+  const [visible, setVisible] = useState(true);
+  const doneRef = useRef(false); // guard against StrictMode double-fire
+
+  useEffect(() => {
+    const interval = setInterval(() => {
+      setProgress(p => {
+        const next = p + 2;
+        return next > 100 ? 100 : next;
+      });
+    }, 30);
+    return () => clearInterval(interval);
+  }, []);
+
+  useEffect(() => {
+    if (progress >= 100 && !doneRef.current) {
+      doneRef.current = true;
+      const t1 = setTimeout(() => setVisible(false), 400);
+      const t2 = setTimeout(onComplete, 900);
+      return () => { clearTimeout(t1); clearTimeout(t2); };
+    }
+  }, [progress, onComplete]);
+
+  return (
+    <AnimatePresence>
+      {visible && (
+        <motion.div
+          className="boot-screen"
+          initial={{ opacity: 1 }}
+          exit={{ opacity: 0 }}
+          transition={{ duration: 0.5 }}
+        >
+          <div className="boot-logo">
+            <svg viewBox="0 0 814 1000" className="boot-apple">
+              <path d="M788.1 340.9c-5.8 4.5-108.2 62.2-108.2 190.5 0 148.4 130.3 200.9 134.2 202.2-.6 3.2-20.7 71.9-68.7 141.9-42.8 61.6-87.5 123.1-155.5 123.1s-85.5-39.5-164-39.5c-76 0-103.7 40.8-165.9 40.8s-105-37.5-167.5-124.3C92 432.1 44.7 259.5 44.7 217.8c0-70.5 46-107.7 89.4-107.7 48.3 0 82.5 32.4 120.9 32.4 36.3 0 74.9-33.7 121.7-33.7 46.8 0 86.6 24.7 111.1 61.6zm-170.7-93.3c21.2-25.7 36.3-61.6 36.3-97.5 0-5.1-.6-10.2-1.3-14.7-34.4 1.3-75.5 22.5-100.6 51.5-19.2 22.5-37.5 58.4-37.5 94.9 0 5.8.6 11.5 1.3 16.7 3.2.6 8.3 1.3 13.5 1.3 30.8 0 68.1-20.4 88.3-52.2z"/>
+            </svg>
+          </div>
+          <div className="boot-progress-track">
+            <div className="boot-progress-bar" style={{ width: `${progress}%` }} />
+          </div>
+        </motion.div>
+      )}
+    </AnimatePresence>
+  );
+}