feat: 模板适配层、易班能力与全局状态

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/utils/useOrientation.ts

@@ -0,0 +1,22 @@
+import { useEffect, useState } from "react";
+
+function getIsPortrait() {
+	if (typeof window === "undefined") return false;
+	return window.innerHeight > window.innerWidth;
+}
+
+export function useOrientation() {
+	const [isPortrait, setIsPortrait] = useState(getIsPortrait);
+
+	useEffect(() => {
+		const updateOrientation = () => setIsPortrait(getIsPortrait());
+		window.addEventListener("resize", updateOrientation);
+		window.addEventListener("orientationchange", updateOrientation);
+		return () => {
+			window.removeEventListener("resize", updateOrientation);
+			window.removeEventListener("orientationchange", updateOrientation);
+		};
+	}, []);
+
+	return isPortrait;
+}