feat(rah-light): simplify settings panel

- Update ContextViewer description to remove chat reference
- All existing tabs remain useful for MCP/workflow functionality:
  - Logs, Tools, Workflows, API Keys, Database, Context, External Agents
- No agent-specific or voice settings were present

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/settings/ContextViewer.tsx

@@ -73,7 +73,7 @@ export default function ContextViewer() {
   return (
     <div style={containerStyle}>
       <p style={descStyle}>
-        Top 10 most-connected nodes are added to background context for chats and workflows.
+        Top 10 most-connected nodes are added to background context for workflow execution.
       </p>
 
       {/* Toggle */}