重构: 前端架构审查降技术债·i18n收口(高ROI)

- 新建 src/i18n/i18n-helpers.ts: 类型安全 t + currentLocale(any中转内部1处带注释)
- 12文件改 i18n as any 样板收口: utils/time + stores(knowledge/project/{ideas,projects,tasks,workflow}) + composables(aiShared/useAiConversations/useAiEvents/useAiSend/useAiStream/useToolCard)
- as any 22→10(i18n 13→0对外), 签名统一(key, named?)
- useToolCard文档块同步(防AI被过时注释误导)

src/composables/ai/useAiEvents.ts

@@ -16,17 +16,12 @@ import { ref } from 'vue'
 import { aiApi } from '@/api'
 import { useAppSettingsStore } from '@/stores/appSettings'
 import { state } from '@/stores/ai'
-import i18n from '@/i18n'
+import { t } from '@/i18n/i18n-helpers'
 import { nextMsgId, findToolCall, startApprovalTimer, clearApprovalTimer, clearAllApprovalTimers } from './aiShared'
 import { resetStreamWatchdog, clearStreamWatchdog } from './useAiStream'
 import { loadConversations } from './useAiConversations'
 import type { AiChatEvent, AiMessage, AiToolCallInfo } from '@/api/types'
 
-// composable 内非组件上下文(无 setup),用 vue-i18n 全局实例的 t 而非 useI18n()。
-// 通过 any 中转规避 vue-i18n 深度 message schema 泛型导致的 TS2589(类型实例化过深)。
-// CR-30-2: 签名放宽支持插值参数(复用现有 t('ai.xxx', {...}) 模式,如 aiShared.ts:75)。
-const t = ((i18n as any).global.t as (key: string, params?: Record<string, unknown>) => string).bind((i18n as any).global)
-
 let _unlistenAiEvent: (() => void) | null = null
 let _unlistenConvChanged: (() => void) | null = null
 // AE-2025-06: onStreamTimeout 广播的审批计时器清理事件 unlistener