v2.0.6 — oumta-dashboard: hardwire config, drop settings tab

This plugin only targets one specific deployment, so the settings
panel was noise that tempted accidental misconfiguration. baseUrl,
authToken and pollIntervalSec now live in a top-of-file CONFIG
constant; the hyprcrd-settings tab, the localStorage persistence,
and the panel CSS are gone.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

config.php

@@ -1,7 +1,7 @@
 <?php
 
 define('APP_NAME', 'hyprcrd');
-define('APP_VERSION', '2.0.5');
+define('APP_VERSION', '2.0.6');
 
 // APP_DEBUG: gates verbose error responses (curl traces, upstream bodies).
 // Off by default; enable via env for local troubleshooting only.