优化: 前端扫描文案 i18n + parseStack 抽公共 + alert/confirm 换组件

- 扫描/目录状态文案走 $t（Projects/ProjectDetail，zh-CN+en 同步）
- parseStack 抽公共到 src/utils/project.ts（删两份本地实现）
- 8 处原生 alert/confirm 全换（confirm→ConfirmDialog / alert→Arco Message），控制流语义不变

Sprint 20 审查 ⑥⑦⑧。vue-tsc 0 error，验证 safe 0 issue

src/views/ProjectDetail.vue

@@ -90,7 +90,7 @@
           <div class="info-item" v-if="currentProject.path">
             <span class="label">{{ $t('projectDetail.dirStatusLabel') }}</span>
             <span :class="pathExists === false ? 'path-missing' : 'path-ok'">
-              {{ pathExists === null ? '检测中…' : pathExists ? '✓ 目录存在' : '⚠ 目录已移走，建议重定位' }}
+              {{ pathExists === null ? $t('projectDetail.dirChecking') : pathExists ? $t('projectDetail.dirExists') : $t('projectDetail.dirMissing') }}
             </span>
           </div>
 
@@ -193,6 +193,9 @@
         </div>
       </div>
     </div>
+
+    <!-- 确认弹层（删除/重定位确认，替代原生 window.confirm/alert） -->
+    <ConfirmDialog :visible="confirmState.visible" :msg="confirmState.msg" @result="answerConfirm" />
   </div>
 </template>
 
@@ -200,11 +203,14 @@
 import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
+import { Message } from '@arco-design/web-vue'
 import { open } from '@tauri-apps/plugin-dialog'
 import { useProjectStore } from '../stores/project'
 import { projectApi } from '../api'
 import { formatDate } from '../utils/time'
+import { parseStack } from '../utils/project'
 import { projectStatusLabel, projectStageInfo, taskStatusLabel, taskStatusClass } from '../constants/project'
+import ConfirmDialog from '../components/ConfirmDialog.vue'
 import type { WorkflowEventPayload } from '../api/types'
 
 const route = useRoute()
@@ -215,6 +221,21 @@ const logListRef = ref<HTMLElement | null>(null)
 const showApprovalDialog = ref(false)
 let unlisten: (() => void) | null = null
 
+// ── 确认弹层（替代原生 window.confirm，后者在 Tauri webview 带 localhost 来源信息无法去除） ──
+const confirmState = ref({ visible: false, msg: '', resolve: null as null | ((v: boolean) => void) })
+function confirmDialog(msg: string): Promise<boolean> {
+  return new Promise(resolve => {
+    confirmState.value.msg = msg
+    confirmState.value.visible = true
+    confirmState.value.resolve = resolve
+  })
+}
+function answerConfirm(ok: boolean) {
+  confirmState.value.visible = false
+  confirmState.value.resolve?.(ok)
+  confirmState.value.resolve = null
+}
+
 // ── 阶段定义(labelKey 对应 i18n projectDetail.stage*) ──
 const stages = [
   { key: 'idea', labelKey: 'stageIdea' },
@@ -317,17 +338,6 @@ async function handleSync() {
 // ── 代码目录绑定 ──
 const pathExists = ref<boolean | null>(null)
 
-// 解析技术栈 JSON 数组字符串(防崩)
-function parseStack(stack: string | null): string[] {
-  if (!stack) return []
-  try {
-    const arr = JSON.parse(stack)
-    return Array.isArray(arr) ? arr : []
-  } catch {
-    return []
-  }
-}
-
 // 检查绑定目录是否存在(详情页「目录是否还在」)
 async function checkPath() {
   const p = currentProject.value
@@ -351,16 +361,19 @@ async function relocateDir() {
     try {
       const conflict = await projectApi.checkBinding(dir, p.id)
       if (conflict) {
-        alert(`该目录已被项目「${conflict.name}」绑定`)
+        Message.warning(t('projectDetail.dirConflict', { name: conflict.name }))
         return
       }
     } catch { /* ignore */ }
-    if (!confirm(`将项目目录${currentProject.value?.path ? '重定位' : '绑定'}到:\n${dir}\n\n技术栈将重新探测。确认?`)) return
+    const confirmMsg = p.path
+      ? t('projectDetail.relocateConfirmRelocate', { dir })
+      : t('projectDetail.relocateConfirmBind', { dir })
+    if (!await confirmDialog(confirmMsg)) return
     await store.relocateProjectPath(p.id, dir)
     await checkPath()
   } catch (e: any) {
     console.error('重定位失败:', e)
-    alert('重定位失败: ' + (e?.toString() ?? '未知错误'))
+    Message.error(t('projectDetail.relocateFailed', { msg: e?.toString() ?? '未知错误' }))
   }
 }
 
@@ -374,7 +387,7 @@ async function handleApproval(decision: string) {
 async function handleDelete() {
   const p = currentProject.value
   if (!p) return
-  if (!confirm(t('projectDetail.confirmDelete', { name: p.name }))) return
+  if (!await confirmDialog(t('projectDetail.confirmDelete', { name: p.name }))) return
   await store.deleteProject(p.id)
   router.push('/projects')
 }