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/sqlite/22_moderation_decisions.sql

@@ -0,0 +1,11 @@
+/* Moderators' decisions on name requests and pet names. See the MySQL migration. */
+CREATE TABLE IF NOT EXISTS moderation_decisions (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    kind TEXT NOT NULL,
+    subject_id BIGINT NOT NULL,
+    subject TEXT NOT NULL DEFAULT '',
+    approved INTEGER NOT NULL DEFAULT 0,
+    reason TEXT NOT NULL DEFAULT '',
+    decided_at BIGINT NOT NULL DEFAULT 0
+);
+CREATE INDEX IF NOT EXISTS moderation_decisions_subject ON moderation_decisions (kind, subject_id);