Fix residence list not refreshing after add/edit on iOS and Android

Fixed issue where adding or editing a residence didn't update the residence
list, requiring manual refresh to see changes.

iOS Changes:
- ResidencesListView: Added onResidenceCreated callback to AddResidenceView
  sheet that triggers loadMyResidences(forceRefresh: true)
- AddResidenceView: Added onResidenceCreated callback parameter
- ResidenceFormView: Added onSuccess callback that fires before dismissing
  in both create and update modes

Android Changes:
- ResidencesScreen: Added shouldRefresh parameter with LaunchedEffect that
  watches for changes and reloads residences when flag is true
- App.kt (ResidencesRoute): Read "refresh" flag from saved state handle
- App.kt (AddResidenceRoute): Set "refresh" flag in previous back stack
  entry before navigating back on residence created
- App.kt (EditResidenceRoute): Set "refresh" flag before navigating back
  on residence updated

Both platforms now properly refresh the residence list when:
- A new residence is added
- An existing residence is edited
- User joins a residence with code (already working)

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

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

iosApp/iosApp/ResidenceFormView.swift

@@ -4,6 +4,7 @@ import ComposeApp
 struct ResidenceFormView: View {
     let existingResidence: Residence?
     @Binding var isPresented: Bool
+    var onSuccess: (() -> Void)?
     @StateObject private var viewModel = ResidenceViewModel()
     @FocusState private var focusedField: Field?
 
@@ -301,6 +302,7 @@ struct ResidenceFormView: View {
             // Edit mode
             viewModel.updateResidence(id: residence.id, request: request) { success in
                 if success {
+                    onSuccess?()
                     isPresented = false
                 }
             }
@@ -308,6 +310,7 @@ struct ResidenceFormView: View {
             // Add mode
             viewModel.createResidence(request: request) { success in
                 if success {
+                    onSuccess?()
                     isPresented = false
                 }
             }