Add word-book practice, iOS app shell, and fix embedded WebView blank screen.

Ship dual-track learning (daily accumulation vs textbook),沪教/商务词书 APIs and UI, native iOS wrapper with bundled H5, and production book import on deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

ios/scripts/build-web-assets.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+FRONTEND="$ROOT/frontend"
+OUT="$ROOT/ios/WordLoop/WordLoop/www"
+
+echo ">>> 构建 iOS 内嵌前端"
+cd "$FRONTEND"
+if [ ! -d node_modules ]; then
+  npm install --silent
+fi
+npm run build:ios
+
+rm -rf "$OUT"
+mkdir -p "$OUT"
+cp -R dist/* "$OUT/"
+
+python3 - <<PY
+from pathlib import Path
+
+out = Path("$OUT")
+html_path = out / "index.html"
+js_path = out / "assets" / "app.js"
+css_path = out / "assets" / "app.css"
+html = html_path.read_text(encoding="utf-8")
+js = js_path.read_text(encoding="utf-8")
+css = css_path.read_text(encoding="utf-8")
+
+# 单文件内联，避免 wordloop:// 二次请求脚本失败
+html = html.replace('<link rel="stylesheet" href="wordloop://app/assets/app.css">', f"<style>{css}</style>")
+html = html.replace(
+    '<script src="wordloop://app/assets/app.js"></script>',
+    "",
+)
+# 脚本放在 </body> 前，确保 #app 已存在（head 内联会导致 Vue mount 失败、白屏）
+html = html.replace(
+    "</body>",
+    f"    <script>{js}</script>\\n  </body>",
+)
+
+html_path.write_text(html, encoding="utf-8")
+print(">>> 已内联 app.js / app.css 到 index.html")
+PY
+
+echo ">>> 已复制到 $OUT"