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

lib/api/annotations.ts

@@ -6,6 +6,7 @@ export interface Annotation {
   id: string
   site_id: string
   date: string
+  time?: string | null
   text: string
   category: AnnotationCategory
   created_by: string
@@ -15,12 +16,14 @@ export interface Annotation {
 
 export interface CreateAnnotationRequest {
   date: string
+  time?: string
   text: string
   category?: AnnotationCategory
 }
 
 export interface UpdateAnnotationRequest {
   date: string
+  time?: string
   text: string
   category: AnnotationCategory
 }