feat(docs): Circadian Light Group JSON editor

Static GitHub Pages tool to edit a CLG's config_json: profile, anchors,
phase values, outdoor source, and per-device settings. Supports merging
device entries from a temp/test CLG by ID-deduplicated append, so users
can build groups incrementally without depending on the in-app repair
view (which has scroll/dismiss issues on the Android Homey app).

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

Author: Tiwas

docs/index.html

@@ -83,6 +83,10 @@ <h3 class="text-lg font-semibold text-green-600 mb-2">Formula Builder</h3>
                     <h3 class="text-lg font-semibold text-green-600 mb-2">Boolean Editor</h3>
                     <p class="text-gray-600">Advanced editor for boolean device configurations</p>
                 </a>
+                <a href="tools/clg-editor.html" class="bg-white rounded-lg p-6 shadow-sm border border-gray-200 card-hover transition">
+                    <h3 class="text-lg font-semibold text-amber-600 mb-2">Circadian Light Group Editor</h3>
+                    <p class="text-gray-600">Edit CLG config_json: profile, devices, merge from another CLG</p>
+                </a>
                 <a href="tools/state-editor.html" class="bg-white rounded-lg p-6 shadow-sm border border-gray-200 card-hover transition">
                     <h3 class="text-lg font-semibold text-blue-600 mb-2">State Editor</h3>
                     <p class="text-gray-600">Visual editor for State Device configurations</p>