feat: directly implement IntoIterator on keyed fields

examples/stores/src/lib.rs

@@ -95,7 +95,10 @@ pub fn App() -> impl IntoView {
             <input type="submit"/>
         </form>
         <ol>
-            <For each=move || store.todos().iter_keyed() key=|row| row.id().get() let:todo>
+            // because `todos` is a keyed field, `store.todos()` returns a struct that
+            // directly implements IntoIterator, so we can use it in <For/> and
+            // it will manage reactivity for the store fields correctly
+            <For each=move || store.todos() key=|row| row.id().get() let:todo>
                 <TodoRow store todo/>
             </For>
 

reactive_stores/src/keyed.rs

@@ -638,18 +638,21 @@ where
     }
 }
 
-impl<Inner, Prev, K, T> KeyedSubfield<Inner, Prev, K, T>
+impl<Inner, Prev, K, T> IntoIterator for KeyedSubfield<Inner, Prev, K, T>
 where
     Self: Clone,
     for<'a> &'a T: IntoIterator,
-    Inner: StoreField<Value = Prev>,
+    Inner: Clone + StoreField<Value = Prev> + 'static,
     Prev: 'static,
     K: Debug + Send + Sync + PartialEq + Eq + Hash + 'static,
-    T: IndexMut<usize>,
+    T: IndexMut<usize> + 'static,
     T::Output: Sized,
 {
+    type Item = AtKeyed<Inner, Prev, K, T>;
+    type IntoIter = StoreFieldKeyedIter<Inner, Prev, K, T>;
+
     #[track_caller]
-    pub fn iter_keyed(self) -> StoreFieldKeyedIter<Inner, Prev, K, T> {
+    fn into_iter(self) -> StoreFieldKeyedIter<Inner, Prev, K, T> {
         // reactively track changes to this field
         let trigger = self.get_trigger(self.path().into_iter().collect());
         trigger.track();