fix (light): use the full lower range of light brightness

Tuya lights commonly have a range of 10-1000 for brightness, but due
to rounding error, 13 is the lowest that HA can set it to. When HA is
setting brightness 1, use the minimum rather than the standard HA range
calculation.

Issue #4060

custom_components/tuya_local/light.py

@@ -289,7 +289,11 @@ class TuyaLocalLight(TuyaLocalEntity, LightEntity):
                 )
                 r = self._brightness_dps.range(self._device)
                 if r:
-                    bright = color_util.brightness_to_value(r, bright)
+                    # ensure full range is used
+                    if bright == 1 and r[0] != 0:
+                        bright = r[0]
+                    else:
+                        bright = color_util.brightness_to_value(r, bright)
 
                 settings = {
                     **settings,
@@ -448,7 +452,11 @@ class TuyaLocalLight(TuyaLocalEntity, LightEntity):
 
             r = self._brightness_dps.range(self._device)
             if r:
-                bright = color_util.brightness_to_value(r, bright)
+                # ensure full range is used
+                if bright == 1 and r[0] != 0:
+                    bright = r[0]
+                else:
+                    bright = color_util.brightness_to_value(r, bright)
 
             settings = {
                 **settings,