diff --git a/src-tauri/src/commands/ai/commands.rs b/src-tauri/src/commands/ai/commands.rs
index b3d8705..1296303 100644
--- a/src-tauri/src/commands/ai/commands.rs
+++ b/src-tauri/src/commands/ai/commands.rs
@@ -265,10 +265,28 @@ pub async fn ai_chat_stop(state: State<'_, AppState>, app: AppHandle) -> Result<
 // 提供商管理
 // ============================================================
 
+/// api_key 脱敏:IPC 不传明文给前端(FR-S1),保留首尾各 4 字符便于辨识
+fn mask_api_key(key: &str) -> String {
+    let chars: Vec<char> = key.chars().collect();
+    if chars.len() <= 8 {
+        return "•".repeat(chars.len());
+    }
+    let prefix: String = chars[..4].iter().collect();
+    let suffix: String = chars[chars.len() - 4..].iter().collect();
+    format!("{}••••{}", prefix, suffix)
+}
+
 /// 列出所有已配置的 AI 提供商（is_default 真相源为 DB，重启不丢）
 #[tauri::command]
 pub async fn ai_list_providers(state: State<'_, AppState>) -> Result<Vec<AiProviderRecord>, String> {
-    state.ai_providers.list_all().await.map_err(|e| e.to_string())
+    let mut providers = state.ai_providers.list_all().await.map_err(|e| e.to_string())?;
+    // IPC 不传明文 api_key(FR-S1):前端编辑用空 apiKey 表示不改,mask 后前端 realm 不持有明文
+    for p in &mut providers {
+        if !p.api_key.is_empty() {
+            p.api_key = mask_api_key(&p.api_key);
+        }
+    }
+    Ok(providers)
 }
 
 /// 保存/更新 AI 提供商配置
@@ -300,6 +318,18 @@ pub async fn ai_save_provider(
             .map_err(|e| e.to_string())?
             .iter().any(|p| p.is_default),
     };
+    // api_key 空(编辑不改 key,前端 list 拿到 mask 故留空)→保留原 DB 值(FR-S1)
+    let api_key = if api_key.is_empty() {
+        match &id {
+            Some(pid) => state.ai_providers.get_by_id(pid).await
+                .map_err(|e| e.to_string())?
+                .map(|p| p.api_key)
+                .unwrap_or_default(),
+            None => String::new(),
+        }
+    } else {
+        api_key
+    };
     let record = AiProviderRecord {
         id: id.unwrap_or_else(new_id),
         name,
diff --git a/src/views/Settings.vue b/src/views/Settings.vue
index 1866304..d8a2ebf 100644
--- a/src/views/Settings.vue
+++ b/src/views/Settings.vue
@@ -443,7 +443,7 @@ function openProviderForm(p?: AiProviderConfig) {
     providerForm.editId = p.id
     providerForm.name = p.name
     providerForm.baseUrl = p.base_url
-    providerForm.apiKey = p.api_key
+    providerForm.apiKey = '' // 编辑不回填 api_key(list 返回 mask,留空=不改,FR-S1)
     providerForm.defaultModel = p.default_model
     providerForm.providerType = p.provider_type || 'openai_compat'
   } else {
@@ -458,7 +458,9 @@ function openProviderForm(p?: AiProviderConfig) {
 }
 
 async function saveProvider() {
-  if (!providerForm.name || !providerForm.baseUrl || !providerForm.apiKey || !providerForm.defaultModel) {
+  // apiKey:新建必填;编辑可留空(不改,FR-S1 后端保留原 DB 值)
+  const needKey = !providerForm.editId
+  if (!providerForm.name || !providerForm.baseUrl || (needKey && !providerForm.apiKey) || !providerForm.defaultModel) {
     showToast(t('settings.toastSaveIncomplete'), 'warning')
     return
   }