优化: F-09生成中新建对话不中断(决策e)

去中断弹窗+去generatingConvs.clear(对齐switchConversation真并发)+死key清理;vue-tsc✅

src/i18n/en/aiChat.ts

@@ -115,8 +115,6 @@ export default {
     confirmDeleteActiveConversation: '"{title}" is the chat you are currently viewing. Deleting it will clear the current view and cannot be undone. Continue?',
     clearChat: 'Clear',
     confirmClearChat: 'Are you sure you want to clear all messages in this chat? This cannot be undone.',
-    // UX-08 §3.4: generate-in-progress confirm when starting a new chat (only when generating, otherwise no behavior change)
-    confirmNewConvWhileGenerating: 'Generation is in progress. Interrupt it and start a new chat?',
     toastSendFail: 'Send failed: {msg}',
 
     // ── Message copy (F-260615-13) ──

src/i18n/zh-CN/aiChat.ts

@@ -116,8 +116,6 @@ export default {
     confirmDeleteActiveConversation: '「{title}」是当前正在查看的对话,删除后将清空当前视图且不可恢复,确定继续？',
     clearChat: '清空',
     confirmClearChat: '确定清空当前对话的所有消息？此操作不可恢复。',
-    // UX-08 §3.4:生成中点新建对话确认弹窗(仅生成中触发,非生成中零行为变化)
-    confirmNewConvWhileGenerating: '当前正在生成，确定中断并新建对话？',
     toastSendFail: '发送失败：{msg}',
 
     // ── 消息拷贝(F-260615-13) ──