优化: UX错误气泡区分重试类型+工具卡按轮次自动收起

src/i18n/en/ai.ts

@@ -24,6 +24,8 @@ export default {
     errorNetwork: 'Network connection failed. Please check your network.',
     // CR-30-2 / F-260616-07(d) / decision a1: stream pre-failure retry bubble copy
     aiStreamRetry: '⚠ Request failed, retrying ({attempt}/{max})…',
+    // UX-260616-01: Fatal errors (4xx/auth) are not retryable — prompt user to check settings instead
+    notRetryable: 'This error cannot be resolved by retrying. Please check the configuration.',
     streamInterruptedAfterTool: '⚠ The tool finished, but the following reply was interrupted (no data stream for a long time). You can click Continue to retry.',
     streamInterrupted: '⚠ The response was interrupted (no data stream for a long time). This may be due to a network disconnection or a backend error. Please try again.',
     // UX-2025-04 / CR-30-2 / decision a1: system notice bubble after mid-stream failure preserve (frontend mirrors backend session.messages)

src/i18n/en/aiChat.ts

@@ -109,7 +109,7 @@ export default {
     editNotLastUser: 'Only the last user message can be edited',
     placeholderEditing: 'Edit message then Enter to regenerate (Esc to cancel)',
 
-    // ── Error bubble actions (UX-03) ──
+    // ── Error bubble actions (UX-03 / UX-260616-01) ──
     retry: 'Retry',
     goToSettingsAction: 'Open settings',