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/Projects.vue

@@ -21,7 +21,7 @@
           <textarea v-model="newDesc" :placeholder="$t('projects.descPlaceholder')" rows="3"></textarea>
         </div>
         <div class="modal-field">
-          <label>{{ $t('projects.codeDirLabel') }}（可选，绑定后自动识别技术栈）</label>
+          <label>{{ $t('projects.codeDirLabel') }}{{ $t('projects.codeDirOptionalHint') }}</label>
           <div class="dir-row">
             <input v-model="newPath" :placeholder="$t('projects.codeDirPlaceholder')" readonly />
             <button class="btn btn-ghost btn-sm" type="button" @click="pickDir">{{ $t('projects.selectDir') }}</button>
@@ -30,7 +30,7 @@
           <div v-if="pathWarning" class="path-warning">⚠ {{ pathWarning }}</div>
           <div v-if="newPath" class="scan-row">
             <button class="btn btn-ghost btn-sm" type="button" @click="aiScan" :disabled="scanning">
-              {{ scanning ? 'AI 扫描中…' : '🤖 AI 扫描填信息' }}
+              {{ scanning ? $t('projects.aiScanning') : $t('projects.aiScanFill') }}
             </button>
             <span v-if="scanProjectType" class="tech-tag">{{ scanProjectType }}</span>
           </div>
@@ -107,6 +107,9 @@
     <div v-if="!store.loading && store.projects.length === 0" class="empty-state">
       {{ $t('projects.empty') }}
     </div>
+
+    <!-- 确认弹层（删除/彻底删除，替代原生 window.confirm） -->
+    <ConfirmDialog :visible="confirmState.visible" :msg="confirmState.msg" @result="answerConfirm" />
   </div>
 </template>
 
@@ -118,7 +121,9 @@ 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 as statusLabel, projectBadgeClass as stageClass } from '../constants/project'
+import ConfirmDialog from '../components/ConfirmDialog.vue'
 import type { ProjectRecord } from '../api/types'
 
 const router = useRouter()
@@ -128,6 +133,21 @@ const { t } = useI18n()
 // 状态映射统一走 ../constants/project(与 ProjectDetail/Tasks/Dashboard 一致)
 // formatDate 由 ../utils/time 提供（统一毫秒字符串解析，根治 Invalid Date）
 
+// ── 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
+}
+
 // ── 新建项目 ──
 const showCreateModal = ref(false)
 const newName = ref('')
@@ -139,17 +159,6 @@ const scanning = ref(false)
 const scanError = ref('')
 const scanProjectType = ref('')
 
-// 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 []
-  }
-}
-
 // 选择目录 → 探测技术栈 + 查重
 async function pickDir() {
   try {
@@ -163,7 +172,7 @@ async function pickDir() {
     // 查重(已被其他项目绑定则警告,禁止创建)
     try {
       const conflict = await projectApi.checkBinding(selected as string)
-      if (conflict) pathWarning.value = `该目录已被项目「${conflict.name}」绑定`
+      if (conflict) pathWarning.value = t('projects.dirConflict', { name: conflict.name })
     } catch { /* ignore */ }
   } catch (e) {
     console.error('选择目录失败:', e)
@@ -190,9 +199,9 @@ async function aiScan() {
     detectedStack.value = result.stack
     if (result.description) newDesc.value = result.description
     scanProjectType.value = result.project_type ?? ''
-    if (!result.description) scanError.value = 'AI 未能生成描述，可手动填写'
+    if (!result.description) scanError.value = t('projects.aiScanNoDesc')
   } catch (e: any) {
-    scanError.value = e?.toString() ?? 'AI 扫描失败'
+    scanError.value = e?.toString() ?? t('projects.aiScanFailed')
   } finally {
     scanning.value = false
   }
@@ -214,7 +223,7 @@ async function submitCreate() {
 const showTrashModal = ref(false)
 
 async function handleDelete(project: ProjectRecord) {
-  if (!confirm(t('projects.confirmDelete', { name: project.name }))) return
+  if (!await confirmDialog(t('projects.confirmDelete', { name: project.name }))) return
   await store.deleteProject(project.id)
 }
 
@@ -228,7 +237,7 @@ async function handleRestore(id: string) {
 }
 
 async function handlePurge(project: ProjectRecord) {
-  if (!confirm(t('projects.confirmPurge', { name: project.name }))) return
+  if (!await confirmDialog(t('projects.confirmPurge', { name: project.name }))) return
   await store.purgeProject(project.id)
 }