fix(rings): make widget rings fill available space + higher render res

Rings were capped at a fixed 86dp; now each gauge fills its half of the widget
(weighted ImageView) so they grow with the placed widget size. Bumped RingRenderer
default bitmap to 360px/36 stroke to stay crisp at the larger display size.

app/src/main/java/me/khodak/claudeusage/RingRenderer.kt

@@ -40,8 +40,8 @@ object RingRenderer {
         markerColor: Int?,
         centerText: String,
         labelText: String? = null,
-        sizePx: Int = 240,
-        strokePx: Float = 24f
+        sizePx: Int = 360,
+        strokePx: Float = 36f
     ): Bitmap {
         val bmp = Bitmap.createBitmap(sizePx, sizePx, Bitmap.Config.ARGB_8888)
         val canvas = Canvas(bmp)