subhankar-1990/WeatherUI — reverse-engineered prompt

Build me a simple WeatherUI app inside this existing Angular project. I want a clean page where someone can type a city name, search, and see the current weather in a nice card with temperature, weather condition, location, humidity, wind speed, and a small icon or visual style that matches the condition.

Please make it feel polished, with a modern background, loading state, empty state, and a clear error message if the city is not found. It should work well on phone and desktop. If you need a weather API, use a common free one and keep the API key setup obvious so I can add mine later. If no key is available, include a small mock fallback so the UI can still be tested.

Keep it simple and easy to run with ng serve. Look up current Angular docs online if you need to.