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/components/home-client.tsx

@@ -65,7 +65,7 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
   const [pinnedNotes, setPinnedNotes] = useState<Note[]>(
     initialNotes.filter(n => n.isPinned)
   )
-  const [notesViewMode, setNotesViewMode] = useState<NotesViewMode>(initialSettings.notesViewMode)
+  const [notesViewMode, setNotesViewMode] = useState<NotesViewMode>(initialSettings.notesViewMode === 'list' ? 'masonry' : initialSettings.notesViewMode)
   const [noteHistoryMode] = useState<'manual' | 'auto'>(initialSettings.noteHistoryMode)
   const [editingNote, setEditingNote] = useState<{ note: Note; readOnly?: boolean } | null>(null)
   const [isLoading, setIsLoading] = useState(false)