Fix clippy warnings

Author: stippi

crates/code_assistant/src/session/manager.rs

@@ -1609,8 +1609,10 @@ mod tests {
             .save_chat_session(&persisted)
             .expect("save switched session");
 
-        let mut captured_config = SessionConfig::default();
-        captured_config.use_diff_blocks = false;
+        let captured_config = SessionConfig {
+            use_diff_blocks: false,
+            ..Default::default()
+        };
         let mut captured_state = SessionState::from_messages(
             session_id.clone(),
             "test".to_string(),

crates/code_assistant/src/ui/gpui/input/model_selector.rs

@@ -161,7 +161,7 @@ impl ModelSelector {
                 .filter(|(model_name, _)| {
                     allowed_models
                         .as_ref()
-                        .map_or(true, |allowed| allowed.contains(*model_name))
+                        .is_none_or(|allowed| allowed.contains(*model_name))
                 })
                 .filter_map(|(model_name, model_config)| {
                     let provider_config = config.providers.get(&model_config.provider)?;