Refactor HomeAssistantNumericPicker for improved value parsing (#345)

ref
https://github.com/house-of-abbey/GarminHomeAssistant/issues/238#issuecomment-3941469731

fix numberpicker issue
refactored with Amazon Q
tested on Vivoactive 5 (simulator and device)
tested on Venu2 (simulator only)

.gitignore

@@ -7,3 +7,4 @@ Thumbs.db
 source/ClientId.mc
 # Gemini API key for automated translations
 gemini_api_key.txt
+developer_key

source/HomeAssistantNumericPicker.mc

@@ -32,24 +32,27 @@ class HomeAssistantNumericPicker extends WatchUi.Picker {
     ) {
         mItem      = haItem;
         var picker = mItem.getPicker();
-        var min    = (picker.get("min") as Lang.String).toFloat();
-        var step   = (picker.get("step") as Lang.String).toFloat();
+        var minStr = picker.get("min");
+        var stepStr = picker.get("step");
         var val    = haItem.getValue();
-
-        if (min == null) {
-            min = 0.0;
+        
+        var min = 0.0;
+        var step = 1.0;
+        
+        if (minStr != null) {
+            min = (minStr as Lang.String).toFloat();
         }
-        if (step == null) {
-            step = 1.0;
+        if (stepStr != null) {
+            step = (stepStr as Lang.String).toFloat();
         }
 
         WatchUi.Picker.initialize({
-            :title    => new WatchUi.Text({
+            :title => new WatchUi.Text({
                 :text => haItem.getLabel(),
                 :locX => WatchUi.LAYOUT_HALIGN_CENTER,
                 :locY => WatchUi.LAYOUT_VALIGN_BOTTOM
             }),
-            :pattern  => [factory],
+            :pattern => [factory],
             :defaults => [((val - min) / step).toNumber()]
         });
     }
@@ -95,4 +98,4 @@ class HomeAssistantNumericPickerDelegate extends WatchUi.PickerDelegate {
         mPicker.onConfirm(values[0]);
         return true;
     }
-}
+}