fix(layout, input): improve scroll layout calculation and input sizing

- layout: fix logic in `layout_heights` to correctly calculate height for horizontal scroll containers (left_to_right axis) when nested in a vertical container (top_to_bottom axis).
- input: change internal rectangle sizing from `fill_fit` to `fill_fill` in `view_input.v` to ensure correct background filling.

Author: mike-ward

layout.v

@@ -371,7 +371,7 @@ fn layout_fill_widths(mut layout Layout) {
 	} else if layout.shape.axis == .top_to_bottom {
 		if layout.shape.id_scroll > 0 && layout.shape.sizing.width == .fill
 			&& layout.shape.scroll_mode != .vertical_only
-			&& layout.parent.shape.axis != .top_to_bottom {
+			&& layout.parent.shape.axis == .left_to_right {
 			sibling_widths := layout.parent.children.filter(it.shape.uid != layout.shape.uid).map(it.shape.width)
 			layout.shape.width = layout.parent.shape.width - arrays.sum(sibling_widths) or { 0 }
 			layout.shape.width -= layout.parent.spacing()
@@ -524,7 +524,7 @@ fn layout_fill_heights(mut layout Layout) {
 	} else if layout.shape.axis == .left_to_right {
 		if layout.shape.id_scroll > 0 && layout.shape.sizing.height == .fill
 			&& layout.shape.scroll_mode != .horizontal_only
-			&& layout.parent.shape.axis != .left_to_right {
+			&& layout.parent.shape.axis == .top_to_bottom {
 			sibling_heights := layout.parent.children.filter(it.shape.uid != layout.shape.uid).map(it.shape.height)
 			layout.shape.height = layout.parent.shape.height - arrays.sum(sibling_heights) or { 0 }
 			layout.shape.height -= layout.parent.spacing()

view_input.v

@@ -174,7 +174,7 @@ pub fn input(cfg InputCfg) View {
 		amend_layout: cfg.amend_layout
 		content:      [
 			column(
-				name:            'input interior'
+				name:            'input scroll container'
 				id_scroll:       cfg.id_scroll
 				scrollbar_cfg_x: cfg.scrollbar_cfg_x
 				scrollbar_cfg_y: cfg.scrollbar_cfg_y
@@ -183,15 +183,17 @@ pub fn input(cfg InputCfg) View {
 				padding:         cfg.padding
 				radius:          cfg.radius
 				sizing:          fill_fill
-				spacing:         spacing_small
+				spacing:         0
 				content:         [
 					row(
+						name:     'input interior'
 						padding:  padding_none
 						sizing:   fill_fill
 						on_click: cfg.on_click_interior
 						content:  [
 							text(
 								id_focus:           cfg.id_focus
+								sizing:             fill_fill
 								text:               txt
 								text_style:         txt_style
 								mode:               mode
@@ -200,7 +202,7 @@ pub fn input(cfg InputCfg) View {
 							),
 							rectangle(
 								color:  color_transparent
-								sizing: fill_fit
+								sizing: fill_fill
 							),
 							row(
 								name:     'input icon'