Fix context menu click-outside behavior to prevent underlying actions

When a context menu is open, clicking outside should only close the menu
without triggering underlying actions (like drag-to-create in week view).

Implementation:
- Enhanced global click handler to prevent default actions when menus are open
- Added context menu state propagation through component hierarchy
- Modified interactive components to check context menu state before acting
- Provides double protection at both global and component levels

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/components/calendar.rs

@@ -23,6 +23,8 @@ pub struct CalendarProps {
     pub view: ViewMode,
     #[prop_or_default]
     pub on_create_event_request: Option<Callback<EventCreationData>>,
+    #[prop_or_default]
+    pub context_menus_open: bool,
 }
 
 #[function_component]
@@ -209,6 +211,7 @@ pub fn Calendar(props: &CalendarProps) -> Html {
                             on_event_context_menu={props.on_event_context_menu.clone()}
                             on_calendar_context_menu={props.on_calendar_context_menu.clone()}
                             on_create_event={Some(on_create_event)}
+                            context_menus_open={props.context_menus_open}
                         />
                     },
                 }