Fix iterator related clippy style lint violations (#36437)

Release Notes:

- N/A

crates/agent_ui/src/agent_diff.rs

@@ -503,8 +503,7 @@ fn update_editor_selection(
                         &[last_kept_hunk_end..editor::Anchor::max()],
                         buffer_snapshot,
                     )
-                    .skip(1)
-                    .next()
+                    .nth(1)
             })
             .or_else(|| {
                 let first_kept_hunk = diff_hunks.first()?;

crates/agent_ui/src/message_editor.rs

@@ -690,11 +690,7 @@ impl MessageEditor {
             .as_ref()
             .map(|model| {
                 self.incompatible_tools_state.update(cx, |state, cx| {
-                    state
-                        .incompatible_tools(&model.model, cx)
-                        .iter()
-                        .cloned()
-                        .collect::<Vec<_>>()
+                    state.incompatible_tools(&model.model, cx).to_vec()
                 })
             })
             .unwrap_or_default();

crates/agent_ui/src/text_thread_editor.rs

@@ -747,11 +747,7 @@ impl TextThreadEditor {
             self.context.read(cx).invoked_slash_command(&command_id)
         {
             if let InvokedSlashCommandStatus::Finished = invoked_slash_command.status {
-                let run_commands_in_ranges = invoked_slash_command
-                    .run_commands_in_ranges
-                    .iter()
-                    .cloned()
-                    .collect::<Vec<_>>();
+                let run_commands_in_ranges = invoked_slash_command.run_commands_in_ranges.clone();
                 for range in run_commands_in_ranges {
                     let commands = self.context.update(cx, |context, cx| {
                         context.reparse(cx);