feat: Refactor admin UI pages to support embedded mode and improve navigation

- Updated PlayerLogs, Players, Reports, Rooms, Settings, SignupCodes, and other pages to accept an optional `embedded` prop for better integration in various contexts.
- Introduced a new Activity page consolidating audit logs and player request logs with tab navigation.
- Added Content page for community board and loading tips with tab navigation.
- Created Moderation page to unify player directory, bans, and reports under a single interface.
- Implemented SettingsHome page to manage server settings and signup codes with tab navigation.
- Enhanced the Join page to include password creation for new accounts.
- Added global friends feature in Settings to allow all accounts to be friends without database entries.
- Introduced RelationshipQueries service to manage effective friend resolution based on global friends toggle.
- Added WireDates for consistent date handling in serialized data.
- Created reusable Tabs component for consistent tab navigation across various pages.

DorkNet.Server/Data/Entities/RelationshipEntity.cs

@@ -9,6 +9,12 @@ namespace DorkNet.Server.Data.Entities;
 /// </summary>
 public enum RelationshipStatus
 {
+    /// <summary>No friendship/block — the row exists only to hold the
+    /// requester's own favorite/mute/ignore preference about the target.
+    /// The actual relationship status (if any) lives on the paired row in
+    /// the other direction; the read path merges the two.</summary>
+    None = 0,
+
     /// <summary>Mutual friend (both directions accepted).</summary>
     Friend = 1,