feat(filelib): 老师端左栏导航:回收站 + 最近打开(ADR-0031)

- 回收站:listBin(祖先全活跃的已删顶点;管理员/直连 MANAGE 可见)、
  restore(与 D15 对称只清本节点,落审计)、purge(仅管理员,pathIds 枚举
  子树按深度降序分批硬删,绕过 self-FK RESTRICT)
- 最近打开:FileLibRecentVisit 表(filePath='' 兜底 PG 唯一索引),客户端
  成功打开后上报(VIEW 门禁,upsert 刷新),列表 20 条,D8/D15 可见性过滤
- 前端:/app 左栏(文件库/最近打开/回收站);RecentView/BinView;
  GridLibraryView 埋点 + navTarget 跳转(breadcrumb 建栈,role 已捎带)
- 测试:filelib-nav 集成 4 例;全套 79 例绿

hub/src/database/routes/binRoutes.ts

@@ -0,0 +1,45 @@
+/**
+ * /database/api/bin/* 回收站端点(ADR-0031)。
+ * 约定:绝对路径;actorOrNull 前置;业务全走 binService;错误统一 sendRouteError。
+ */
+
+import type { FastifyInstance } from "fastify";
+import { listBin, purgeBinEntry, restoreBinEntry } from "../filelib/binService.js";
+import { actorOrNull, sendRouteError, type FileLibRouteDeps } from "../filelib/routeShared.js";
+
+export async function registerBinRoutes(app: FastifyInstance, deps: FileLibRouteDeps): Promise<void> {
+  const svc = { prisma: deps.prisma, organizationId: deps.organizationId, groupResolver: deps.groupResolver };
+
+  app.get("/database/api/bin", async (request, reply) => {
+    const actor = await actorOrNull(request, reply, deps);
+    if (actor === null) return reply;
+    try {
+      return { entries: await listBin(svc, actor) };
+    } catch (error) {
+      return sendRouteError(reply, error);
+    }
+  });
+
+  app.post("/database/api/bin/:id/restore", async (request, reply) => {
+    const actor = await actorOrNull(request, reply, deps);
+    if (actor === null) return reply;
+    try {
+      const { id } = request.params as { id: string };
+      await restoreBinEntry(svc, actor, id);
+      return reply.status(204).send();
+    } catch (error) {
+      return sendRouteError(reply, error);
+    }
+  });
+
+  app.delete("/database/api/bin/:id", async (request, reply) => {
+    const actor = await actorOrNull(request, reply, deps);
+    if (actor === null) return reply;
+    try {
+      const { id } = request.params as { id: string };
+      return await purgeBinEntry(svc, actor, id);
+    } catch (error) {
+      return sendRouteError(reply, error);
+    }
+  });
+}