Update Kotlin models and iOS Swift to align with new Go API format

- Update all Kotlin API models to match Go API response structures
- Fix Swift type aliases (TaskDetail→TaskResponse, Residence→ResidenceResponse, etc.)
- Update TaskCompletionCreateRequest to simplified Go API format (taskId, notes, actualCost, photoUrl)
- Fix optional handling for frequency, priority, category, status in task models
- Replace isPrimaryOwner with ownerId comparison against current user
- Update ResidenceUsersResponse to use owner.id instead of ownerId
- Fix non-optional String fields to use isEmpty checks instead of optional binding
- Add type aliases for backwards compatibility in Kotlin models

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

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

iosApp/iosApp/Subviews/Task/CompletionCardView.swift

@@ -2,7 +2,7 @@ import SwiftUI
 import ComposeApp
 
 struct CompletionCardView: View {
-    let completion: TaskCompletion
+    let completion: TaskCompletionResponse
     @State private var showPhotoSheet = false
 
     var body: some View {
@@ -64,15 +64,16 @@ struct CompletionCardView: View {
                     .fontWeight(.medium)
             }
 
-            if let notes = completion.notes {
-                Text(notes)
+            if !completion.notes.isEmpty {
+                Text(completion.notes)
                     .font(.caption2)
                     .foregroundColor(Color.appTextSecondary)
                     .lineLimit(2)
             }
 
             // Show button to view photos if images exist
-            if let images = completion.images, !images.isEmpty {
+            if !completion.images.isEmpty {
+                let images = completion.images
                 Button(action: {
                     showPhotoSheet = true
                 }) {
@@ -95,9 +96,7 @@ struct CompletionCardView: View {
         .background(Color.appBackgroundSecondary.opacity(0.5))
         .cornerRadius(8)
         .sheet(isPresented: $showPhotoSheet) {
-            if let images = completion.images {
-                PhotoViewerSheet(images: images)
-            }
+            PhotoViewerSheet(images: completion.images)
         }
     }