feat: refine native iOS chat experience

Sources/Networking/AuthClient.swift

@@ -82,6 +82,18 @@ final class AuthClient {
         struct Response: Decodable { let user: AuthUser }
         return try JSONDecoder().decode(Response.self, from: await request("api/auth/me", method: "GET", token: token)).user
     }
+    func voices(token: String) async throws -> VoiceCatalogResponse {
+        #if DEBUG
+        if ProcessInfo.processInfo.arguments.contains("--ui-testing"),
+           !ProcessInfo.processInfo.arguments.contains("--live-testing") {
+            return VoiceCatalogResponse(defaultVoice: Voices.defaultID, voices: Voices.all,
+                                        catalogAvailable: false, message: "Offline test voice catalog.")
+        }
+        #endif
+        guard !token.isEmpty else { throw AuthError.status(401) }
+        return try JSONDecoder().decode(VoiceCatalogResponse.self, from: await request("voices", method: "GET", token: token))
+    }
+
     func logout(token: String) async throws {
         _ = try await request("api/auth/logout", method: "POST", token: token)
     }