Fix a bunch of other low-hanging style lints (#36498)

- **Fix a bunch of low hanging style lints like unnecessary-return**
- **Fix single worktree violation**
- **And the rest**

Release Notes:

- N/A

crates/prompt_store/src/prompt_store.rs

@@ -247,9 +247,7 @@ impl PromptStore {
 
             if metadata_db
                 .get(&txn, &prompt_id_v2)?
-                .map_or(true, |metadata_v2| {
-                    metadata_v1.saved_at > metadata_v2.saved_at
-                })
+                .is_none_or(|metadata_v2| metadata_v1.saved_at > metadata_v2.saved_at)
             {
                 metadata_db.put(
                     &mut txn,

crates/prompt_store/src/prompts.rs

@@ -286,7 +286,7 @@ impl PromptBuilder {
                             break;
                         }
                     for event in changed_paths {
-                        if event.path.starts_with(&templates_dir) && event.path.extension().map_or(false, |ext| ext == "hbs") {
+                        if event.path.starts_with(&templates_dir) && event.path.extension().is_some_and(|ext| ext == "hbs") {
                             log::info!("Reloading prompt template override: {}", event.path.display());
                             if let Some(content) = params.fs.load(&event.path).await.log_err() {
                                 let file_name = event.path.file_stem().unwrap().to_string_lossy();