Implement availability management in Scheduling component

- Added functionality to load user availability from the database on component mount.
- Integrated create and delete availability features with the backend.
- Refactored event handling to manage availability slots dynamically.
- Updated supabase.ts to include methods for fetching, creating, and deleting availability records.

management-dashboard-web-app/src/lib/supabase.ts

@@ -976,3 +976,68 @@ export const phaseDraftManagement = {
     }
   }
 }
+
+// Conductor Availability Management
+export interface ConductorAvailability {
+  id: string
+  user_id: string
+  available_from: string
+  available_to: string
+  notes?: string | null
+  status: 'active' | 'cancelled'
+  created_at: string
+  updated_at: string
+  created_by: string
+}
+
+export interface CreateAvailabilityRequest {
+  available_from: string
+  available_to: string
+  notes?: string
+}
+
+export const availabilityManagement = {
+  async getMyAvailability(): Promise<ConductorAvailability[]> {
+    const { data: { user }, error: authError } = await supabase.auth.getUser()
+    if (authError || !user) throw new Error('User not authenticated')
+
+    const { data, error } = await supabase
+      .from('conductor_availability')
+      .select('*')
+      .eq('user_id', user.id)
+      .eq('status', 'active')
+      .order('available_from', { ascending: true })
+
+    if (error) throw error
+    return data
+  },
+
+  async createAvailability(request: CreateAvailabilityRequest): Promise<ConductorAvailability> {
+    const { data: { user }, error: authError } = await supabase.auth.getUser()
+    if (authError || !user) throw new Error('User not authenticated')
+
+    const { data, error } = await supabase
+      .from('conductor_availability')
+      .insert({
+        user_id: user.id,
+        available_from: request.available_from,
+        available_to: request.available_to,
+        notes: request.notes,
+        created_by: user.id
+      })
+      .select()
+      .single()
+
+    if (error) throw error
+    return data
+  },
+
+  async deleteAvailability(id: string): Promise<void> {
+    const { error } = await supabase
+      .from('conductor_availability')
+      .update({ status: 'cancelled' })
+      .eq('id', id)
+
+    if (error) throw error
+  }
+}