新增: 项目卡片显示工程数(异步拉取 module 列表)

- ProjectCard 底部新增工程数统计(📁 N),异步拉取不阻塞卡片渲染
- 老项目无工程记录显示 0(不报错,与 list_project_modules 自动补建兼容)

src/components/project/ProjectCard.vue

@@ -14,6 +14,10 @@
 
     <!-- 底部信息 -->
     <div class="card-footer">
+      <div class="footer-stat">
+        <span class="stat-icon">📁</span>
+        <span>{{ moduleCount }}</span>
+      </div>
       <div class="footer-stat">
         <span class="stat-icon">📅</span>
         <span>{{ formatDate(project.created_at) }}</span>
@@ -35,18 +39,29 @@
 // 项目列表卡片 — 从 Projects.vue 抽出(单卡片渲染 + 导航 + 删除触发)。
 // 依赖均为无副作用纯函数 + 共享常量;删除走 emit 交回父组件处理(confirm 弹层 + store 调用)。
 import { useRouter } from 'vue-router'
+import { ref, onMounted } from 'vue'
 import { formatDate } from '@/utils/time'
 import { parseStack } from '@/utils/project'
 import { stripMd } from '@/utils/markdown'
+import { moduleApi } from '@/api/module'
 import { projectStatusLabel as statusLabel, projectBadgeClass as stageClass } from '@/constants/project'
 import type { ProjectRecord } from '@/api/types'
 
-defineProps<{ project: ProjectRecord }>()
+const props = defineProps<{ project: ProjectRecord }>()
 const emit = defineEmits<{
   (e: 'delete', project: ProjectRecord): void
 }>()
 
 const router = useRouter()
+
+// 工程数(异步拉取,展示在卡片底部)
+const moduleCount = ref(0)
+onMounted(async () => {
+  try {
+    const list = await moduleApi.listProjectModules(props.project.id)
+    moduleCount.value = list.length
+  } catch { /* 老项目无工程记录不报错 */ }
+})
 </script>
 
 <style scoped>