fix(settings): inline MCP delete errors and stabilize save-close timer

Replace blocking alert() calls in MCP delete handlers with non-blocking deleteError state updates and setSaveStatus('error') on failure.

Thread deleteError through Settings -> Agents settings views and render inline error feedback in Claude/Codex MCP sections near delete actions.

Prevent orphaned save-close timers by clearing and nulling closeTimerRef before scheduling a new timeout, and by nulling the ref during unmount cleanup.

src/components/settings/view/tabs/agents-settings/AgentsSettingsTab.tsx

@@ -24,6 +24,7 @@ export default function AgentsSettingsTab({
   mcpTestResults,
   mcpServerTools,
   mcpToolsLoading,
+  deleteError,
   onOpenMcpForm,
   onDeleteMcpServer,
   onTestMcpServer,
@@ -86,6 +87,7 @@ export default function AgentsSettingsTab({
           mcpTestResults={mcpTestResults}
           mcpServerTools={mcpServerTools}
           mcpToolsLoading={mcpToolsLoading}
+          deleteError={deleteError}
           onOpenMcpForm={onOpenMcpForm}
           onDeleteMcpServer={onDeleteMcpServer}
           onTestMcpServer={onTestMcpServer}

src/components/settings/view/tabs/agents-settings/sections/AgentCategoryContentSection.tsx

@@ -19,6 +19,7 @@ export default function AgentCategoryContentSection({
   mcpTestResults,
   mcpServerTools,
   mcpToolsLoading,
+  deleteError,
   onOpenMcpForm,
   onDeleteMcpServer,
   onTestMcpServer,
@@ -95,6 +96,7 @@ export default function AgentCategoryContentSection({
           testResults={mcpTestResults}
           serverTools={mcpServerTools}
           toolsLoading={mcpToolsLoading}
+          deleteError={deleteError}
         />
       )}
 
@@ -115,6 +117,7 @@ export default function AgentCategoryContentSection({
           onAdd={() => onOpenCodexMcpForm()}
           onEdit={(server) => onOpenCodexMcpForm(server)}
           onDelete={(serverId) => onDeleteCodexMcpServer(serverId)}
+          deleteError={deleteError}
         />
       )}
     </div>

src/components/settings/view/tabs/agents-settings/sections/content/McpServersContent.tsx

@@ -31,6 +31,7 @@ type ClaudeMcpServersProps = {
   testResults: Record<string, McpTestResult>;
   serverTools: Record<string, McpToolsResult>;
   toolsLoading: Record<string, boolean>;
+  deleteError?: string | null;
 };
 
 function ClaudeMcpServers({
@@ -40,6 +41,7 @@ function ClaudeMcpServers({
   onDelete,
   testResults,
   serverTools,
+  deleteError,
 }: Omit<ClaudeMcpServersProps, 'agent' | 'onTest' | 'onDiscoverTools' | 'toolsLoading'>) {
   const { t } = useTranslation('settings');
 
@@ -57,6 +59,11 @@ function ClaudeMcpServers({
           {t('mcpServers.addButton')}
         </Button>
       </div>
+      {deleteError && (
+        <div className="rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-700 dark:border-red-800/60 dark:bg-red-900/20 dark:text-red-200">
+          {deleteError}
+        </div>
+      )}
 
       <div className="space-y-2">
         {servers.map((server) => {
@@ -254,9 +261,10 @@ type CodexMcpServersProps = {
   onAdd: () => void;
   onEdit: (server: McpServer) => void;
   onDelete: (serverId: string) => void;
+  deleteError?: string | null;
 };
 
-function CodexMcpServers({ servers, onAdd, onEdit, onDelete }: Omit<CodexMcpServersProps, 'agent'>) {
+function CodexMcpServers({ servers, onAdd, onEdit, onDelete, deleteError }: Omit<CodexMcpServersProps, 'agent'>) {
   const { t } = useTranslation('settings');
 
   return (
@@ -273,6 +281,11 @@ function CodexMcpServers({ servers, onAdd, onEdit, onDelete }: Omit<CodexMcpServ
           {t('mcpServers.addButton')}
         </Button>
       </div>
+      {deleteError && (
+        <div className="rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-700 dark:border-red-800/60 dark:bg-red-900/20 dark:text-red-200">
+          {deleteError}
+        </div>
+      )}
 
       <div className="space-y-2">
         {servers.map((server) => (

src/components/settings/view/tabs/agents-settings/types.ts

@@ -36,6 +36,7 @@ export type AgentsSettingsTabProps = {
   mcpTestResults: Record<string, McpTestResult>;
   mcpServerTools: Record<string, McpToolsResult>;
   mcpToolsLoading: Record<string, boolean>;
+  deleteError: string | null;
   onOpenMcpForm: (server?: McpServer) => void;
   onDeleteMcpServer: (serverId: string, scope?: string) => void;
   onTestMcpServer: (serverId: string, scope?: string) => void;
@@ -71,6 +72,7 @@ export type AgentCategoryContentSectionProps = {
   mcpTestResults: Record<string, McpTestResult>;
   mcpServerTools: Record<string, McpToolsResult>;
   mcpToolsLoading: Record<string, boolean>;
+  deleteError: string | null;
   onOpenMcpForm: (server?: McpServer) => void;
   onDeleteMcpServer: (serverId: string, scope?: string) => void;
   onTestMcpServer: (serverId: string, scope?: string) => void;