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/week_view.rs

@@ -20,6 +20,8 @@ pub struct WeekViewProps {
     pub on_calendar_context_menu: Option<Callback<(web_sys::MouseEvent, NaiveDate)>>,
     #[prop_or_default]
     pub on_create_event: Option<Callback<(NaiveDate, NaiveDateTime, NaiveDateTime)>>,
+    #[prop_or_default]
+    pub context_menus_open: bool,
 }
 
 #[derive(Clone, PartialEq)]
@@ -119,7 +121,13 @@ pub fn week_view(props: &WeekViewProps) -> Html {
                                 
                                 let onmousedown = {
                                     let drag_state = drag_state_clone.clone();
+                                    let context_menus_open = props.context_menus_open;
                                     Callback::from(move |e: MouseEvent| {
+                                        // Don't start drag if any context menu is open
+                                        if context_menus_open {
+                                            return;
+                                        }
+                                        
                                         // Only handle left-click (button 0)
                                         if e.button() != 0 {
                                             return;