修复: 项目详情页三态分离与反馈一致性

- notFound/已归档/加载失败三态分离:单查兜底+归档恢复入口+加载失败重试钮
- 反馈一致性六项:同步守卫与完成提示/首屏并行加载/筛选空态文案/计数改过滤口径/路径勾选 seq 守卫/删除确认危险态
- 文件列表滚动条对齐全局范式(scrollbar-width:thin 致 Chromium 忽略定制样式)
- 删除失败不再跳转(store 返布尔)/幽灵勾选清理/折叠阈值与 CSS 对齐

src/stores/project/projects.ts

@@ -54,11 +54,14 @@ export function createProjectsStore() {
     return record
   }
 
-  async function deleteProject(id: string) {
-    await runWithCatch(state, t('projects.err.deleteFailed'), async () => {
+  async function deleteProject(id: string): Promise<boolean> {
+    // 返成功布尔(失败时 runWithCatch 已置 state.error),详情页删除据此阻断失败后的误跳转
+    const ok = await runWithCatch(state, t('projects.err.deleteFailed'), async () => {
       await projectApi.delete(id) // 软删 → 回收站(可恢复)
       state.projects = state.projects.filter(p => p.id !== id)
+      return true
     })
+    return ok === true
   }
 
   async function loadDeletedProjects() {