feat: refine native iOS chat experience

Sources/Chat/ChatStore.swift

@@ -208,14 +208,24 @@ final class ChatStore: ObservableObject {
             else if regenerate { draft = target.content; await send() }
         } catch { busy = false; await failure(error) }
     }
-    func saveWorkspace(_ workspace: HopeWorkspace?, name: String, instructions: String) async {
-        guard !name.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else { return }
+    @discardableResult
+    func saveWorkspace(_ workspace: HopeWorkspace?, name: String, instructions: String) async -> Bool {
+        guard !name.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+            error = "Enter a workspace name."
+            return false
+        }
         do {
             var body: [String: Any] = ["name": name, "instructions": instructions]
             if let workspace { body["revision"] = workspace.revision }
             let _: WorkspaceEnvelope = try await call(workspace.map { "api/workspaces/\($0.id)" } ?? "api/workspaces", method: workspace == nil ? "POST" : "PATCH", body: body)
-            let result: WorkspacePage = try await call("api/workspaces"); workspaces = result.workspaces
-        } catch { await failure(error) }
+            let result: WorkspacePage = try await call("api/workspaces")
+            workspaces = result.workspaces
+            error = nil
+            return true
+        } catch {
+            await failure(error)
+            return false
+        }
     }
     func deleteWorkspace(_ workspace: HopeWorkspace) async {
         do {