Another batch of lint fixes (#36521)

- **Enable a bunch of extra lints**
- **First batch of fixes**
- **More fixes**

Release Notes:

- N/A

crates/title_bar/src/collab.rs

@@ -41,7 +41,8 @@ fn toggle_screen_sharing(
             let Some(room) = call.room().cloned() else {
                 return;
             };
-            let toggle_screen_sharing = room.update(cx, |room, cx| {
+
+            room.update(cx, |room, cx| {
                 let clicked_on_currently_shared_screen =
                     room.shared_screen_id().is_some_and(|screen_id| {
                         Some(screen_id)
@@ -78,8 +79,7 @@ fn toggle_screen_sharing(
                 } else {
                     Task::ready(Ok(()))
                 }
-            });
-            toggle_screen_sharing
+            })
         }
         Err(e) => Task::ready(Err(e)),
     };