fix(weather): handle missing API key or location in WeatherWidget

Added error logging for cases where the API key or location is not provided, ensuring that users are informed of the missing parameters. Updated the default location to an empty string to prompt user input.

src/core/validation/widgets/yasb/weather.py

@@ -3,7 +3,7 @@
     'label_alt': '0',
     'update_interval': 3600,
     'hide_decimal': False,
-    'location': 'London',
+    'location': '',
     'api_key': '0',
     'units': 'metric',
     'show_alerts': False,

src/core/widgets/yasb/weather.py

@@ -41,6 +41,10 @@ def __init__(
         self._hide_decimal = hide_decimal
         self._icons = icons
         self._api_key = api_key if api_key != 'env' else os.getenv('YASB_WEATHER_API_KEY')
+        if not self._api_key or not self._location:
+            logging.error("API key or location is missing. Please provide a valid API key and location.")
+            return
+        self.api_url = f"http://api.weatherapi.com/v1/forecast.json?key={self._api_key}&q={urllib.parse.quote(self._location)}&days=3&aqi=no&alerts=yes"
         self._units = units
         self._show_alerts = show_alerts
         self._padding = container_padding
@@ -50,7 +54,7 @@ def __init__(
         self._animation = animation
         self._weather_card = weather_card
         self._icon_cache = dict()
-        self.api_url = f"http://api.weatherapi.com/v1/forecast.json?key={self._api_key}&q={urllib.parse.quote(self._location)}&days=3&aqi=no&alerts=yes"
+
         # Construct container
         self._widget_container_layout: QHBoxLayout = QHBoxLayout()
         self._widget_container_layout.setSpacing(0)