Enable screen share on windows (staff only for now as untested)

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

@@ -399,9 +399,7 @@ impl Platform for WindowsPlatform {
     fn screen_capture_sources(
         &self,
     ) -> oneshot::Receiver<Result<Vec<Box<dyn ScreenCaptureSource>>>> {
-        let (mut tx, rx) = oneshot::channel();
-        tx.send(Err(anyhow!("screen capture not implemented"))).ok();
-        rx
+        scap_screen_sources()
     }
 
     fn active_window(&self) -> Option<AnyWindowHandle> {

crates/title_bar/src/collab.rs

@@ -2,6 +2,7 @@ use std::sync::Arc;
 
 use call::{ActiveCall, ParticipantLocation, Room};
 use client::{proto::PeerId, User};
+use feature_flags::FeatureFlagAppExt;
 use gpui::{actions, App, Task, Window};
 use gpui::{canvas, point, AnyElement, Hsla, IntoElement, MouseButton, Path, Styled};
 use rpc::proto::{self};
@@ -301,8 +302,8 @@ impl TitleBar {
         let can_share_projects = room.can_share_projects();
         let screen_sharing_supported = match self.platform_style {
             PlatformStyle::Mac | PlatformStyle::Linux => true,
-            // todo!
-            PlatformStyle::Windows => false,
+            // Windows screen sharing not yet tested.
+            PlatformStyle::Windows => cx.is_staff(),
         };
 
         let mut children = Vec::new();