feat: transaction categorization UX improvements and description matching

Add journal entry preview, human-readable account names, auto-apply VAT,
fallback template suggestions, example prompts, invoice match comparison,
and batch result feedback. Also includes user-description-match extension,
describe/batch-describe API routes, improved AI categorization with multi-
suggestion support, and template embedding search.

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

lib/extensions/icon-resolver.tsx

@@ -24,6 +24,7 @@ import {
   BarChart3,
   Layers,
   Puzzle,
+  TextSearch,
   type LucideIcon,
 } from 'lucide-react'
 
@@ -53,6 +54,7 @@ const ICON_MAP: Record<string, LucideIcon> = {
   BarChart3,
   Layers,
   Puzzle,
+  TextSearch,
 }
 
 export function resolveIcon(name: string): LucideIcon {