diff --git a/.trae/documents/Remove Delete Option and Redirect Upload.md b/.trae/documents/Remove Delete Option and Redirect Upload.md
new file mode 100644
index 0000000..d2f3b78
--- /dev/null
+++ b/.trae/documents/Remove Delete Option and Redirect Upload.md	
@@ -0,0 +1,9 @@
+I will implement the requested changes to remove the delete functionality and redirect the upload interface while keeping the upload API intact.
+
+### 1. Frontend: Song Selection Menu (`public/src/js/songselect.js`)
+*   **Remove Delete Button**: I will remove the "Delete" (削除) button configuration from the `difficultyMenu` buttons array (around lines 313-319). This removes the option from the UI.
+*   **Redirect Upload Action**: I will modify the handler for the "upload" action (around lines 954-958). Instead of redirecting to the local `/upload/` page, it will redirect to `https://zizhipu.taiko.asia`.
+
+### 2. Backend: API Security (`app.py`)
+*   **Disable Delete API**: I will modify the `/api/delete` route to return a 403 Forbidden error (or simply pass), ensuring that songs cannot be deleted even if someone calls the API directly.
+*   **Keep Upload API**: The `/api/upload` route will remain unchanged, preserving the ability to upload songs via API as requested.
diff --git a/app.py b/app.py
index 4b12cde..0af8fcc 100644
--- a/app.py
+++ b/app.py
@@ -911,19 +911,8 @@ def upload_file():
     return flask.jsonify({'success': True})
 
 @app.route("/api/delete", methods=["POST"])
-@limiter.limit("1 per day")
 def delete():
-    id = flask.request.get_json().get('id')
-    client["taiko"]["songs"].delete_one({ "id": id })
-
-    parent_dir = pathlib.Path(os.getenv("TAIKO_WEB_SONGS_DIR", "public/songs"))
-    target_dir = parent_dir / id
-    if not (target_dir.resolve().parents and parent_dir.resolve() in target_dir.resolve().parents):
-        return flask.jsonify({ "success": False, "reason": "PARENT IS NOT ALLOWED" })
-
-    shutil.rmtree(target_dir)
-
-    return "成功しました。"
+    return flask.jsonify({ "success": False, "reason": "Deletion is disabled" }), 403
 
 if __name__ == '__main__':
     import argparse
diff --git a/public/src/js/songselect.js b/public/src/js/songselect.js
index 1497dce..edec6bc 100644
--- a/public/src/js/songselect.js
+++ b/public/src/js/songselect.js
@@ -310,12 +310,6 @@ class SongSelect{
 			iconName: "download",
 			iconFill: "#e7cbe1",
 			letterSpacing: 4
-		}, {
-			text: "削除",
-			fill: "silver",
-			iconName: "trash",
-			iconFill: "#111111",
-			letterSpacing: 4
 		}]
 		this.optionsList = [strings.none, strings.auto, strings.netplay]
 		
@@ -954,7 +948,7 @@ class SongSelect{
                         } else if (currentSong.action === "upload") {
                             this.playSound("se_don");
                             setTimeout(() => {
-                                window.location.href = "/upload/";
+                                window.location.href = "https://zizhipu.taiko.asia";
                             }, 100);
                         } else if (currentSong.action === "keijiban") {
 							this.playSound("se_don");