fix: clippy warnings

CLAUDE.md

@@ -16,6 +16,8 @@ cargo clippy             # Lint
 cargo fmt                # Format
 ```
 
+After finishing tests, always check the package with `nix flake check`.
+
 ## Architecture
 
 Streamd parses markdown files into hierarchical **Shards**, then **localizes** them by assigning temporal moments and dimensional placements based on `@Tag` markers.

src/localize/datetime.rs

@@ -146,7 +146,7 @@ pub fn extract_datetime_from_marker_list(
     };
 
     let naive = NaiveDateTime::new(final_date, final_time);
-    naive_to_utc(naive, tz).unwrap_or_else(|| inherited_datetime)
+    naive_to_utc(naive, tz).unwrap_or(inherited_datetime)
 }
 
 #[cfg(test)]