feat: shared link list (#14200)

#### PR Dependency Tree


* **PR #14200** 👈

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[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **New Features**
* Added a "Shared Links" panel to workspace management, enabling admins
to view all published documents within a workspace
* Added publication date tracking for published documents, now displayed
alongside shared links

* **Chores**
  * Removed deprecated `publicPages` field; use `publicDocs` instead

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<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/schema.gql

@@ -60,6 +60,7 @@ type AdminWorkspace {
   owner: WorkspaceUserType
   public: Boolean!
   publicPageCount: Int!
+  sharedLinks: [AdminWorkspaceSharedLink!]!
   snapshotCount: Int!
   snapshotSize: SafeInt!
 }
@@ -73,6 +74,12 @@ type AdminWorkspaceMember {
   status: WorkspaceMemberStatus!
 }
 
+type AdminWorkspaceSharedLink {
+  docId: String!
+  publishedAt: DateTime
+  title: String
+}
+
 enum AdminWorkspaceSort {
   BlobCount
   BlobSize
@@ -2466,7 +2473,6 @@ type WorkspaceType {
 
   """Get public page of a workspace by page id."""
   publicPage(pageId: String!): DocType @deprecated(reason: "use [WorkspaceType.doc] instead")
-  publicPages: [DocType!]! @deprecated(reason: "use [WorkspaceType.publicDocs] instead")
 
   """quota of workspace"""
   quota: WorkspaceQuotaType!