feat: annotation UX improvements

- Custom calendar (DatePicker) instead of native date input
- Custom dropdown (Select) instead of native select
- EU date format (DD/MM/YYYY) in tooltips and form
- Right-click context menu on chart to add annotations
- Optional time field (HH:MM) for precise timestamps
- Escape key to dismiss, loading state on save
- Bump @ciphera-net/ui to 0.0.95

app/sites/[id]/page.tsx

@@ -238,13 +238,13 @@ export default function SiteDashboardPage() {
   const { data: annotations, mutate: mutateAnnotations } = useAnnotations(siteId, dateRange.start, dateRange.end)
 
   // Annotation mutation handlers
-  const handleCreateAnnotation = async (data: { date: string; text: string; category: string }) => {
+  const handleCreateAnnotation = async (data: { date: string; time?: string; text: string; category: string }) => {
     await createAnnotation(siteId, { ...data, category: data.category as AnnotationCategory })
     mutateAnnotations()
     toast.success('Annotation added')
   }
 
-  const handleUpdateAnnotation = async (id: string, data: { date: string; text: string; category: string }) => {
+  const handleUpdateAnnotation = async (id: string, data: { date: string; time?: string; text: string; category: string }) => {
     await updateAnnotation(siteId, id, { ...data, category: data.category as AnnotationCategory })
     mutateAnnotations()
     toast.success('Annotation updated')