feat(ai): implement intelligent auto-tagging system

- Added multi-provider AI infrastructure (OpenAI/Ollama)
- Implemented real-time tag suggestions with debounced analysis
- Created AI diagnostics and database maintenance tools in Settings
- Added automated garbage collection for orphan labels
- Refined UX with deterministic color hashing and interactive ghost tags

keep-notes/components/note-card.tsx

@@ -13,6 +13,7 @@ import { LabelBadge } from './label-badge'
 import { NoteImages } from './note-images'
 import { NoteChecklist } from './note-checklist'
 import { NoteActions } from './note-actions'
+import { useLabels } from '@/context/LabelContext'
 
 interface NoteCardProps {
   note: Note
@@ -22,6 +23,7 @@ interface NoteCardProps {
 }
 
 export function NoteCard({ note, onEdit, isDragging, isDragOver }: NoteCardProps) {
+  const { refreshLabels } = useLabels()
   const [isDeleting, setIsDeleting] = useState(false)
   const colorClasses = NOTE_COLORS[note.color as NoteColor] || NOTE_COLORS.default
 
@@ -30,6 +32,8 @@ export function NoteCard({ note, onEdit, isDragging, isDragOver }: NoteCardProps
       setIsDeleting(true)
       try {
         await deleteNote(note.id)
+        // Refresh global labels to reflect garbage collection
+        await refreshLabels()
       } catch (error) {
         console.error('Failed to delete note:', error)
         setIsDeleting(false)