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/61_ai_suggestions.sql

@@ -0,0 +1,19 @@
+/* The dashboard's staff-side AI moderator helper: every suggestion asked for, with who asked, the model and tokens, kept with the item it is about. Drafts for staff only. */
+CREATE TABLE IF NOT EXISTS ai_suggestions (
+    id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    kind VARCHAR(32) NOT NULL,
+    item_id BIGINT NOT NULL,
+    fingerprint CHAR(64) NOT NULL,
+    requested_by_id INT UNSIGNED NOT NULL DEFAULT 0,
+    requested_by VARCHAR(64) NOT NULL DEFAULT '',
+    created_at BIGINT NOT NULL,
+    model VARCHAR(100) NOT NULL DEFAULT '',
+    input_tokens INT UNSIGNED NOT NULL DEFAULT 0,
+    output_tokens INT UNSIGNED NOT NULL DEFAULT 0,
+    status TINYINT NOT NULL DEFAULT 0,
+    suggestion TEXT NULL,
+    error TEXT NULL,
+    context MEDIUMTEXT NULL,
+    INDEX ai_suggestions_item (kind, item_id, id),
+    INDEX ai_suggestions_time (created_at)
+);