chore: initialize frontend repo with teaching terminology updates

Add the current frontend codebase with a baseline .gitignore and update piano-specific UI terms to teaching-oriented terms for the current product context.

Made-with: Cursor

cp_dist_moicen.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+set -x
+
+git restore .
+git fetch origin
+git rebase origin/master
+openresty_html_dir='/usr/local/openresty/nginx/html/music-room'
+
+mkdir -p $openresty_html_dir
+
+CUR_HOST=$(echo $HOSTNAME | cut -d "." -f 1)
+
+if [[ "$CUR_HOST" != "moicen" ]]; then
+    echo "HOST ${CUR_HOST} is not moicen!"
+    exit 1
+fi
+
+rm -rf node_modules && pnpm install
+npm run build:$CUR_HOST
+
+sudo cp -r ./dist/* $openresty_html_dir
+
+SERVER=${1:-1}
+
+# upload to upyun
+cd cdn
+sh upload_assets.sh .${CUR_HOST}_upyun_pass $SERVER