feat: add AIUI node capabilities — file reading, log tailing, bitcoin/lnd deep data

Add readFileAsText() to filebrowser client, read-file and tail-logs action
handlers to context broker, bitcoin.getinfo and lnd.getinfo RPC enrichment
for context categories, and update AIUI protocol types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/types/aiui-protocol.ts

@@ -19,7 +19,7 @@ export type AIContextCategory =
   | 'bitcoin'
 
 /** Actions AIUI can request Archy to perform */
-export type AIActionType = 'install-app' | 'open-app' | 'navigate' | 'launch-app' | 'search-web'
+export type AIActionType = 'install-app' | 'open-app' | 'navigate' | 'launch-app' | 'search-web' | 'read-file' | 'tail-logs'
 
 // ─── AIUI → Archy (Requests) ───────────────────────────────────────────────
 
@@ -65,6 +65,7 @@ export interface ArchyActionResponse {
   id: string
   success: boolean
   error?: string
+  data?: unknown
 }
 
 export interface ArchyThemeResponse {