feat(filelib): 移除最近打开模块(ADR-0032,supersede ADR-0031 对应半部)

- FileLibRecentVisit 删表(手写迁移;表当日新建无生产数据)
- recentService/recentRoutes/RecentView 删除;GridLibraryView 埋点与
  navTarget 跳转一并移除;types 清 RecentEntry
- 左栏保留 文件库/回收站(ADR-0031 回收站半部不受影响)
- breadcrumb 的 role 字段保留(独立可用的增量字段)

hub/filelib-web/src/routes/app/+page.svelte

@@ -4,25 +4,17 @@
   import { me, authChecked } from "$lib/stores.js";
   import { loadSession } from "$lib/session.js";
   import LoginView from "$lib/LoginView.svelte";
-  import GridLibraryView, { type NavTarget } from "$lib/GridLibraryView.svelte";
-  import RecentView from "$lib/RecentView.svelte";
+  import GridLibraryView from "$lib/GridLibraryView.svelte";
   import BinView from "$lib/BinView.svelte";
   import Icon from "$lib/Icon.svelte";
 
   onMount(loadSession);
 
-  type View = "library" | "recent" | "bin";
+  type View = "library" | "bin";
   let view = $state<View>("library");
-  let navTarget = $state<NavTarget | null>(null);
 
-  function openFromRecent(target: NavTarget): void {
-    navTarget = target;
-    view = "library";
-  }
-
-  const tabs: ReadonlyArray<readonly [View, string, "layers" | "clock" | "trash"]> = [
+  const tabs: ReadonlyArray<readonly [View, string, "layers" | "trash"]> = [
     ["library", "文件库", "layers"],
-    ["recent", "最近打开", "clock"],
     ["bin", "回收站", "trash"],
   ];
 </script>
@@ -49,9 +41,7 @@
     </nav>
 
     {#if view === "library"}
-      <GridLibraryView {navTarget} onnavigated={() => (navTarget = null)} />
-    {:else if view === "recent"}
-      <RecentView onopen={openFromRecent} />
+      <GridLibraryView />
     {:else}
       <BinView />
     {/if}