refactor: improve code readability and consistency across multiple files

apps/infrastructure/src/bgbash/control.rs

@@ -18,7 +18,15 @@ impl BashControl {
             jobs: Mutex::new(HashMap::new()),
         }
     }
+}
 
+impl Default for BashControl {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl BashControl {
     /// Register a new background job.
     pub fn register(&self, job: Arc<BashJob>) {
         if let Ok(mut guard) = self.jobs.lock() {