Fix capslock on windows (#33093)

The new feature doesn't work well on windows

Release Notes:

- N/A

crates/gpui/src/platform/windows/events.rs

@@ -1227,7 +1227,6 @@ where
 {
     let virtual_key = VIRTUAL_KEY(wparam.loword());
     let mut modifiers = current_modifiers();
-    let capslock = current_capslock();
 
     match virtual_key {
         VK_SHIFT | VK_CONTROL | VK_MENU | VK_LWIN | VK_RWIN => {
@@ -1238,6 +1237,20 @@ where
                 return None;
             }
             state.last_reported_modifiers = Some(modifiers);
+            Some(PlatformInput::ModifiersChanged(ModifiersChangedEvent {
+                modifiers,
+                capslock: current_capslock(),
+            }))
+        }
+        VK_CAPITAL => {
+            let capslock = current_capslock();
+            if state
+                .last_reported_capslock
+                .is_some_and(|prev_capslock| prev_capslock == capslock)
+            {
+                return None;
+            }
+            state.last_reported_capslock = Some(capslock);
             Some(PlatformInput::ModifiersChanged(ModifiersChangedEvent {
                 modifiers,
                 capslock,

crates/gpui/src/platform/windows/window.rs

@@ -43,6 +43,7 @@ pub struct WindowsWindowState {
     pub callbacks: Callbacks,
     pub input_handler: Option<PlatformInputHandler>,
     pub last_reported_modifiers: Option<Modifiers>,
+    pub last_reported_capslock: Option<Capslock>,
     pub system_key_handled: bool,
     pub hovered: bool,
 
@@ -102,6 +103,7 @@ impl WindowsWindowState {
         let callbacks = Callbacks::default();
         let input_handler = None;
         let last_reported_modifiers = None;
+        let last_reported_capslock = None;
         let system_key_handled = false;
         let hovered = false;
         let click_state = ClickState::new();
@@ -121,6 +123,7 @@ impl WindowsWindowState {
             callbacks,
             input_handler,
             last_reported_modifiers,
+            last_reported_capslock,
             system_key_handled,
             hovered,
             renderer,