Expose ParametersBg collections and scan them all in get_child_widget_for_quad to fix Toggle borders rendering in manual layouts

 src/backend/window_runner.rs          | 55 +++++++++++++++++++++++++++++++++++
 src/widget/container/parameters_bg.rs |  4 +--
 2 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/src/backend/window_runner.rs b/src/backend/window_runner.rs
index f9bc3cd..0dad421 100644
--- a/src/backend/window_runner.rs
+++ b/src/backend/window_runner.rs
@@ -614,6 +614,22 @@ fn get_child_widget_for_quad<'a>(
     qx: f32, qy: f32, qw: f32, qh: f32,
 ) -> &'a dyn crate::widget::Element {
     if let Some(pbg) = w.as_any().downcast_ref::<crate::widget::ParametersBg>() {
+        for s_opt in &pbg.sliders {
+            if let Some(s) = s_opt {
+                let (sx, sy, sww, shh) = s.rect();
+                if qx >= sx - 0.1 && qx + qw <= sx + sww + 0.1 && qy >= sy - 0.1 && qy + qh <= sy + shh + 0.1 {
+                    return s;
+                }
+            }
+        }
+        for f_opt in &pbg.float3s {
+            if let Some(f) = f_opt {
+                let (fx, fy, fww, fhh) = f.rect();
+                if qx >= fx - 0.1 && qx + qw <= fx + fww + 0.1 && qy >= fy - 0.1 && qy + qh <= fy + fhh + 0.1 {
+                    return f;
+                }
+            }
+        }
         for sb_opt in &pbg.spinboxes {
             if let Some(sb) = sb_opt {
                 let (sx, sy, sww, shh) = sb.rect();
@@ -630,6 +646,45 @@ fn get_child_widget_for_quad<'a>(
                 }
             }
         }
+        for ch_opt in &pbg.choices {
+            if let Some(ch) = ch_opt {
+                let (cx, cy, cww, chh) = ch.rect();
+                if qx >= cx - 0.1 && qx + qw <= cx + cww + 0.1 && qy >= cy - 0.1 && qy + qh <= cy + chh + 0.1 {
+                    return ch;
+                }
+            }
+        }
+        for t_opt in &pbg.texts {
+            if let Some(t) = t_opt {
+                let (tx, ty, tww, thh) = t.rect();
+                if qx >= tx - 0.1 && qx + qw <= tx + tww + 0.1 && qy >= ty - 0.1 && qy + qh <= ty + thh + 0.1 {
+                    return t;
+                }
+            }
+        }
+        for cb_opt in &pbg.checkboxes {
+            if let Some(cb) = cb_opt {
+                let (cx, cy, cww, chh) = cb.rect();
+                if qx >= cx - 0.1 && qx + qw <= cx + cww + 0.1 && qy >= cy - 0.1 && qy + qh <= cy + chh + 0.1 {
+                    return cb;
+                }
+            }
+        }
+        for c_opt in &pbg.colors {
+            if let Some(c) = c_opt {
+                let (cx, cy, cww, chh) = c.rect();
+                if qx >= cx - 0.1 && qx + qw <= cx + cww + 0.1 && qy >= cy - 0.1 && qy + qh <= cy + chh + 0.1 {
+                    return c;
+                }
+            }
+        }
+        for &child_ptr in &pbg.children {
+            let child = unsafe { &*child_ptr };
+            let (cx, cy, cww, chh) = child.rect();
+            if qx >= cx - 0.1 && qx + qw <= cx + cww + 0.1 && qy >= cy - 0.1 && qy + qh <= cy + chh + 0.1 {
+                return child;
+            }
+        }
     }
     if let Some(mc) = w.as_any().downcast_ref::<crate::widget::input::MultiControl>() {
         let (bx, by, bw, bh) = mc.add_button.rect();
diff --git a/src/widget/container/parameters_bg.rs b/src/widget/container/parameters_bg.rs
index b14e755..265df53 100644
--- a/src/widget/container/parameters_bg.rs
+++ b/src/widget/container/parameters_bg.rs
@@ -10,8 +10,8 @@ pub struct ParametersBg {
     pub focused_param: Option<usize>,
     pub code_editor: Option<TextEditorState>,
     mouse_pos: Option<(f32, f32)>,
-    sliders: Vec<Option<Slider>>,
-    float3s: Vec<Option<Float3>>,
+    pub sliders: Vec<Option<Slider>>,
+    pub float3s: Vec<Option<Float3>>,
     pub spinboxes: Vec<Option<Spinbox>>,
     pub buttons: Vec<Option<Button>>,
     pub choices: Vec<Option<Dropdown>>,