feat: web dashboard and playground work

The NexusDashboard-parity dashboard (dDashboardServer) and everything built on it on the experimental branch:
accounts, characters, properties and moderation tools, permissions shared with in-game slash commands, economy
reports, World 3D and property 3D views with client scenery, scheduled events (features, vanity changes, live
events, announcements, restarts), vanity files and events, the CDClient browser, the message inspector with saved
captures, chat filter tools, community challenges, live ops, the AI moderator helper, and the server-side changes
they need.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

migrations/dlu/mysql/39_moderation_decisions.sql

@@ -0,0 +1,12 @@
+/* Moderators' decisions on name requests and pet names, with the reason, so players can see why a name was turned down.
+   subject_id is the character (kind 'name') or the pet (kind 'pet_name'); subject is the name that was asked for. */
+CREATE TABLE IF NOT EXISTS moderation_decisions (
+    id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    kind VARCHAR(16) NOT NULL,
+    subject_id BIGINT NOT NULL,
+    subject VARCHAR(64) NOT NULL DEFAULT '',
+    approved TINYINT NOT NULL DEFAULT 0,
+    reason VARCHAR(255) NOT NULL DEFAULT '',
+    decided_at BIGINT NOT NULL DEFAULT 0,
+    INDEX moderation_decisions_subject (kind, subject_id)
+);