新增: 列表分页UI(Paginator组件+三视图接入)

Paginator.vue复用组件(客户端切片,不发新IPC,数据量小前瞻基建)
Tasks/Ideas/Projects.vue接store列表切片(pagedProjects/pagedIdeas)
向后兼容铁律:pageSize=0整组件v-if隐藏+切片返全量,等价改造前行为
旧调用方(store.loadTasks等签名)零改动,分页状态纯前端ref
筛选/排序变化page重置1防越界空页;i18n双语pagination键齐备

src/views/Projects.vue

@@ -140,9 +140,16 @@
 
     <!-- 项目卡片网格(单卡片渲染抽至 components/project/ProjectCard.vue,删除走 emit 回父处理) -->
     <div class="project-grid">
-      <ProjectCard v-for="project in store.projects" :key="project.id" :project="project" @delete="handleDelete" />
+      <ProjectCard v-for="project in pagedProjects" :key="project.id" :project="project" @delete="handleDelete" />
     </div>
 
+    <!-- 分页器(F-260621-02 P3):pageSize=0 不分页(全量,等价旧行为);用户选 N 条触发客户端切片 -->
+    <Paginator
+      v-model:page="page"
+      v-model:pageSize="pageSize"
+      :total="store.projects.length"
+    />
+
     <!-- 空状态 -->
     <div v-if="!store.loading && store.projects.length === 0" class="empty-state">
       {{ $t('projects.empty') }}
@@ -165,6 +172,7 @@ import { projectApi } from '@/api'
 import { formatDate } from '@/utils/time'
 import ConfirmDialog from '@/components/ConfirmDialog.vue'
 import ProjectCard from '@/components/project/ProjectCard.vue'
+import Paginator from '@/components/Paginator.vue'
 import { useConfirm } from '@/composables/useConfirm'
 import type { ProjectRecord } from '@/api/types'
 import type { ScannedProjectItem } from '@/api/project'
@@ -172,6 +180,17 @@ import type { ScannedProjectItem } from '@/api/project'
 const store = useProjectStore()
 const { t } = useI18n()
 
+// 分页(F-260621-02 P3):pageSize=0 → 全量(向后兼容,等价改造前);用户选 N → 客户端切片
+const page = ref(1)
+const pageSize = ref(0)
+
+// 分页视图:pageSize=0 → 全量;否则取当前页窗口
+const pagedProjects = computed(() => {
+  if (pageSize.value <= 0) return store.projects
+  const start = (page.value - 1) * pageSize.value
+  return store.projects.slice(start, start + pageSize.value)
+})
+
 // 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）