diff --git a/flask_session/2029240f6d1128be89ddc32729463129 b/flask_session/2029240f6d1128be89ddc32729463129
new file mode 100644
index 0000000..60b84f8
Binary files /dev/null and b/flask_session/2029240f6d1128be89ddc32729463129 differ
diff --git a/public/src/js/songselect.js b/public/src/js/songselect.js
index 8562634..ce17460 100644
--- a/public/src/js/songselect.js
+++ b/public/src/js/songselect.js
@@ -2965,7 +2965,6 @@ class SongSelect{
 			var categoryName = song.category
 			var originalCategory = song.category
 		}
-		// Fallback: if category is missing, use song_type to enable category jump
 		if(!categoryName){
 			if(song.song_type){
 				categoryName = song.song_type
diff --git a/update.sh b/update.sh
new file mode 100644
index 0000000..c4ed01f
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+if [ "${EUID}" -ne 0 ]; then echo "需要 root 权限"; exit 1; fi
+
+SRC_DIR=$(cd "$(dirname "$0")" && pwd)
+DEST_DIR=/srv/taiko-web
+SONGS_DIR="$DEST_DIR/public/songs"
+BACKUP_DIR="$DEST_DIR/.backup_songs_$(date +%Y%m%d_%H%M%S)"
+
+systemctl stop taiko-web || true
+
+if [ -d "$SONGS_DIR" ]; then
+  mkdir -p "$BACKUP_DIR"
+  rsync -a "$SONGS_DIR/" "$BACKUP_DIR/" || cp -a "$SONGS_DIR/." "$BACKUP_DIR/"
+fi
+
+mkdir -p "$DEST_DIR"
+rsync -a --delete \
+  --exclude '.git' \
+  --exclude '.venv' \
+  --exclude 'public/songs' \
+  "$SRC_DIR/" "$DEST_DIR/"
+
+if [ -x "$DEST_DIR/.venv/bin/pip" ]; then
+  "$DEST_DIR/.venv/bin/pip" install -U pip
+  "$DEST_DIR/.venv/bin/pip" install -r "$DEST_DIR/requirements.txt"
+fi
+
+chown -R www-data:www-data "$DEST_DIR"
+
+if [ -d "$BACKUP_DIR" ]; then
+  mkdir -p "$SONGS_DIR"
+  rsync -a "$BACKUP_DIR/" "$SONGS_DIR/" || cp -a "$BACKUP_DIR/." "$SONGS_DIR/"
+fi
+
+systemctl daemon-reload || true
+systemctl restart taiko-web || systemctl start taiko-web || true
+
+systemctl is-active --quiet taiko-web
\ No newline at end of file