enh: system prompt user permission

backend/open_webui/config.py

@@ -1077,6 +1077,10 @@ USER_PERMISSIONS_CHAT_CONTROLS = (
     os.environ.get("USER_PERMISSIONS_CHAT_CONTROLS", "True").lower() == "true"
 )
 
+USER_PERMISSIONS_CHAT_SYSTEM_PROMPT = (
+    os.environ.get("USER_PERMISSIONS_CHAT_SYSTEM_PROMPT", "True").lower() == "true"
+)
+
 USER_PERMISSIONS_CHAT_FILE_UPLOAD = (
     os.environ.get("USER_PERMISSIONS_CHAT_FILE_UPLOAD", "True").lower() == "true"
 )
@@ -1162,6 +1166,7 @@ DEFAULT_USER_PERMISSIONS = {
     },
     "chat": {
         "controls": USER_PERMISSIONS_CHAT_CONTROLS,
+        "system_prompt": USER_PERMISSIONS_CHAT_SYSTEM_PROMPT,
         "file_upload": USER_PERMISSIONS_CHAT_FILE_UPLOAD,
         "delete": USER_PERMISSIONS_CHAT_DELETE,
         "edit": USER_PERMISSIONS_CHAT_EDIT,

backend/open_webui/routers/users.py

@@ -133,6 +133,7 @@ class SharingPermissions(BaseModel):
 
 class ChatPermissions(BaseModel):
     controls: bool = True
+    system_prompt: bool = True
     file_upload: bool = True
     delete: bool = True
     edit: bool = True