refactor(jni): remove legacy no_tun config field

fix(ui): clarify mapping exit description

vnt-jni/src/lib.rs

@@ -917,8 +917,6 @@ fn parse_config_from_json(json_str: &str) -> anyhow::Result<Config> {
         no_nat: bool,
         #[serde(default)]
         device_mode: DeviceMode,
-        #[serde(default, rename = "no_tun")]
-        legacy_no_tun: Option<bool>,
         #[serde(default)]
         mtu: Option<u16>,
         #[serde(default)]
@@ -934,9 +932,6 @@ fn parse_config_from_json(json_str: &str) -> anyhow::Result<Config> {
     }
 
     let cfg: ConfigJson = serde_json::from_str(json_str)?;
-    if cfg.legacy_no_tun.is_some() {
-        anyhow::bail!("configuration key 'no_tun' was removed; use device_mode = \"no|tun|tap\"");
-    }
 
     let server_addrs: Vec<ProtocolAddress> = cfg
         .server

vnt-web/ui/src/views/ConfigEditor.vue

@@ -504,7 +504,7 @@ const sectionTitleClass = "text-md mb-4 flex items-center font-bold text-slate-9
               <label :class="toggleLabelClass">
                 <div class="flex-1">
                   <div class="text-sm font-medium text-slate-800 dark:text-white">允许作为映射出口</div>
-                  <div class="text-xs text-slate-400 mt-0.5">允许其他设备使用本机作跳板</div>
+                  <div class="text-xs text-slate-400 mt-0.5">允许其他设备使用本机作跳板来进行端口映射</div>
                 </div>
                 <input v-model="formData.allow_mapping" type="checkbox" :class="checkboxClass" />
               </label>