Code quality improvements and cleanup + Implemented ChatService

src/mocks/index.ts

@@ -3,11 +3,13 @@ import {authHandlers} from "./handlers/network.http";
 import {pictureHandlers} from "./handlers/picture.http";
 import {callHandlers} from "./handlers/call.http";
 import {fileUploadHandlers} from "./handlers/fUpl.http";
+import {chatHandlers} from "./handlers/chat.http";
 
 export const allHandlers = [
     ...authHandlers,
     ...networkHandlers,
     ...pictureHandlers,
     ...callHandlers,
-    ...fileUploadHandlers
+    ...fileUploadHandlers,
+    ...chatHandlers
 ]