feat: redesign agents page (architectural-grid style), add image description, fix AI limits, remove dead code

- Redesign agents page with architectural-grid (8) design system:
  rounded-2xl cards, serif headings, motion tabs, dashed templates section
- Replace agent form popup with full-page detail view (SettingsView style)
  with dark planning card, section tooltips, and help button
- Hide advanced mode for slide/excalidraw generators
- Add 'describe images' action to contextual AI assistant
- Add copy button to action/resource preview with HTTP fallback
- Add delete history button to agent run log panel
- Increase AI word limit from 2000 to 5000 (reformulate + transform-markdown)
- Increase max steps slider from 25 to 50
- Fix image description error with clear model compatibility message
- Fix doubled execution count display in agent detail view
- Remove dead files: notes-list-view.tsx, notes-view-toggle.tsx
- Remove 'list' view mode from NotesViewMode type
- Add missing i18n keys (back, configuration, options, copy, cleared)

memento-note/lib/ai/services/paragraph-refactor.service.ts

@@ -56,7 +56,7 @@ export const REFACTOR_OPTIONS: RefactorOption[] = [
 export class ParagraphRefactorService {
   private languageDetection: LanguageDetectionService
   private readonly MIN_WORDS = 10
-  private readonly MAX_WORDS = 2000
+  private readonly MAX_WORDS = 5000
 
   constructor() {
     this.languageDetection = new LanguageDetectionService()