oAI/Views/Screens/CombineConversationsSheet.swift

@@ -25,7 +25,6 @@ import SwiftUI
 
 struct CombineConversationsSheet: View {
     @Environment(\.dismiss) var dismiss
-    @Environment(ChatViewModel.self) private var chatViewModel
 
     let conversations: [Conversation]
     var onCompleted: (Conversation) -> Void
@@ -37,6 +36,8 @@ struct CombineConversationsSheet: View {
     @State private var errorMessage: String?
     @State private var mergeModel: ModelInfo?
     @State private var mergeProvider: Settings.Provider
+    @State private var mergeModels: [ModelInfo] = []
+    @State private var isLoadingMergeModels = false
     @State private var showModelPicker = false
 
     private let settings = SettingsService.shared
@@ -50,11 +51,8 @@ struct CombineConversationsSheet: View {
     }
 
     private var mergeModelLabel: String? {
-        if let mergeModel {
-            return "\(mergeProvider.displayName) / \(mergeModel.name)"
-        }
-        guard let model = settings.defaultModel, !model.isEmpty else { return nil }
-        return "\(settings.defaultProvider.displayName) / \(model)"
+        guard let mergeModel else { return nil }
+        return "\(mergeProvider.displayName) / \(mergeModel.name)"
     }
 
     private var isValid: Bool {
@@ -125,12 +123,37 @@ struct CombineConversationsSheet: View {
                                     Label("No model selected", systemImage: "exclamationmark.triangle.fill")
                                         .font(.caption).foregroundStyle(.orange)
                                 }
-                                Button("Change…") {
+
+                                Menu {
+                                    ForEach(ProviderRegistry.shared.configuredProviders, id: \.self) { p in
+                                        Button {
+                                            switchMergeProvider(to: p)
+                                        } label: {
+                                            HStack {
+                                                Image(systemName: p.iconName)
+                                                Text(p.displayName)
+                                                if p == mergeProvider { Image(systemName: "checkmark") }
+                                            }
+                                        }
+                                    }
+                                } label: {
+                                    Text(mergeProvider.displayName)
+                                }
+                                .menuStyle(.borderlessButton)
+                                .fixedSize()
+                                .font(.caption)
+                                .disabled(isProcessing || isLoadingMergeModels)
+
+                                Button("Change Model…") {
                                     showModelPicker = true
                                 }
                                 .buttonStyle(.link)
                                 .font(.caption)
-                                .disabled(isProcessing)
+                                .disabled(isProcessing || isLoadingMergeModels || mergeModels.isEmpty)
+
+                                if isLoadingMergeModels {
+                                    ProgressView().controlSize(.mini)
+                                }
                             }
                         }
                     }
@@ -173,26 +196,46 @@ struct CombineConversationsSheet: View {
         }
         .frame(minWidth: 520, idealWidth: 560, minHeight: 460, idealHeight: 520)
         .task {
-            if chatViewModel.availableModels.count <= 10 {
-                await chatViewModel.loadAvailableModels()
-            }
-            if mergeModel == nil, let defaultModel = settings.defaultModel {
-                mergeModel = chatViewModel.availableModels.first(where: { $0.id == defaultModel })
+            await loadMergeModels()
+            if let defaultModel = settings.defaultModel {
+                mergeModel = mergeModels.first(where: { $0.id == defaultModel })
             }
         }
         .sheet(isPresented: $showModelPicker) {
             ModelSelectorView(
-                models: chatViewModel.availableModels,
+                models: mergeModels,
                 selectedModel: mergeModel,
                 onSelect: { model in
                     mergeModel = model
-                    mergeProvider = chatViewModel.inferProviderPublic(from: model.id) ?? mergeProvider
                     showModelPicker = false
                 }
             )
         }
     }
 
+    private func switchMergeProvider(to newProvider: Settings.Provider) {
+        guard newProvider != mergeProvider else { return }
+        mergeProvider = newProvider
+        mergeModel = nil
+        mergeModels = []
+        Task { await loadMergeModels() }
+    }
+
+    private func loadMergeModels() async {
+        guard let provider = ProviderRegistry.shared.getProvider(for: mergeProvider) else {
+            mergeModels = []
+            return
+        }
+        isLoadingMergeModels = true
+        defer { isLoadingMergeModels = false }
+        do {
+            mergeModels = try await provider.listModels()
+        } catch {
+            Log.api.error("Failed to load models for merge provider \(mergeProvider.rawValue): \(error.localizedDescription)")
+            mergeModels = []
+        }
+    }
+
     private func combine() {
         isProcessing = true
         errorMessage = nil