radio: Add id to RadioGroup to avoid clicks conflict. (#941)

## Break Changes

- The `RadioGroup` now require a `id` to init.

```diff
- RadioGroup::horizontal()
+ RadioGroup::horizontal("group-id-1")
- RadioGroup::vertical()
+ RadioGroup::vertical("group-id-2")
```

crates/story/src/radio_story.rs

@@ -104,7 +104,7 @@ impl Render for RadioStory {
             )
             .child(
                 section("Radio Group").max_w_md().child(
-                    RadioGroup::horizontal()
+                    RadioGroup::horizontal("radio_group_1")
                         .children(["One", "Two", "Three"])
                         .selected_index(self.radio_group_checked)
                         .on_change(cx.listener(|this, selected_ix: &usize, _, cx| {
@@ -117,7 +117,7 @@ impl Render for RadioStory {
                 section("Radio Group Vertical (With container style)")
                     .max_w_md()
                     .child(
-                        RadioGroup::vertical()
+                        RadioGroup::vertical("radio_group_2")
                             .w(px(220.))
                             .p_2()
                             .border_1()
@@ -127,11 +127,7 @@ impl Render for RadioStory {
                             .child(Radio::new("one1").label("United States"))
                             .child(Radio::new("one2").label("Canada"))
                             .child(Radio::new("one3").label("Mexico"))
-                            .selected_index(self.radio_group_checked)
-                            .on_change(cx.listener(|this, selected_ix: &usize, _, cx| {
-                                this.radio_group_checked = Some(*selected_ix);
-                                cx.notify();
-                            })),
+                            .selected_index(Some(1)),
                     ),
             )
     }

crates/ui/src/radio.rs

@@ -146,6 +146,7 @@ impl RenderOnce for Radio {
 /// A Radio group element.
 #[derive(IntoElement)]
 pub struct RadioGroup {
+    id: ElementId,
     style: StyleRefinement,
     radios: Vec<Radio>,
     layout: Axis,
@@ -155,8 +156,9 @@ pub struct RadioGroup {
 }
 
 impl RadioGroup {
-    fn new() -> Self {
+    fn new(id: impl Into<ElementId>) -> Self {
         Self {
+            id: id.into(),
             style: StyleRefinement::default().flex_1(),
             on_change: None,
             layout: Axis::Vertical,
@@ -167,13 +169,13 @@ impl RadioGroup {
     }
 
     /// Create a new Radio group with default Vertical layout.
-    pub fn vertical() -> Self {
-        Self::new()
+    pub fn vertical(id: impl Into<ElementId>) -> Self {
+        Self::new(id)
     }
 
     /// Create a new Radio group with Horizontal layout.
-    pub fn horizontal() -> Self {
-        Self::new().layout(Axis::Horizontal)
+    pub fn horizontal(id: impl Into<ElementId>) -> Self {
+        Self::new(id).layout(Axis::Horizontal)
     }
 
     /// Set the layout of the Radio group. Default is `Axis::Vertical`.
@@ -249,14 +251,15 @@ impl RenderOnce for RadioGroup {
             h_flex().w_full().flex_wrap()
         };
 
-        let mut container = div();
+        let mut container = div().id(self.id);
         *container.style() = self.style;
 
         container.child(
             base.gap_3()
-                .children(self.radios.into_iter().enumerate().map(|(ix, radio)| {
+                .children(self.radios.into_iter().enumerate().map(|(ix, mut radio)| {
                     let checked = selected_ix == Some(ix);
 
+                    radio.id = ix.into();
                     radio.disabled(disabled).checked(checked).when_some(
                         on_change.clone(),
                         |this, on_change| {