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/ServerSettingsEntity.cs

@@ -22,6 +22,16 @@ public class ServerSettingsEntity
     /// brand-new account requests are blocked.</summary>
     public bool SignupsDisabled { get; set; }
 
+    /// <summary>When true, every account on the server is treated as a
+    /// friend of every other account — the relationships list, friend
+    /// online-status HUD, and room-move fan-out all behave as if everyone
+    /// is mutually friended. Built for small private servers where
+    /// searching + manually friend-requesting each other is friction; no
+    /// rows are written, so flipping it off instantly reverts to the real
+    /// relationship graph. Blocked relationships still suppress the pairing,
+    /// and the system/coach account (Id=1) is excluded.</summary>
+    public bool GlobalFriendsEnabled { get; set; }
+
     /// <summary>When true, the watch's weekly-challenge map reports
     /// <c>CompletedRequired</c> — the player must finish every listed
     /// challenge before the gift unlocks. Mirrors