style: format MediaItemsController for consistency and readability

Author: bryanasb251

lesson_26/api/java/api_app/src/main/java/com/codedifferently/lesson26/web/MediaItemsController.java

@@ -1,6 +1,6 @@
 package com.codedifferently.lesson26.web;
 
-import com.codedifferently.lesson26.library.Librarian; 
+import com.codedifferently.lesson26.library.Librarian;
 import com.codedifferently.lesson26.library.Library;
 import com.codedifferently.lesson26.library.MediaItem;
 import com.codedifferently.lesson26.library.search.SearchCriteria;
@@ -21,8 +21,6 @@
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-
-
 @RestController
 @CrossOrigin
 @RequestMapping("/items")
@@ -63,7 +61,7 @@ public ResponseEntity<CreateMediaItemResponse> createItem(
       @Valid @RequestBody CreateMediaItemRequest request) {
     try {
       MediaItem item = MediaItemRequest.asMediaItem(request.getItem());
-      library.addMediaItem(item, librarian); 
+      library.addMediaItem(item, librarian);
       var response = CreateMediaItemResponse.builder().item(MediaItemResponse.from(item)).build();
       return ResponseEntity.ok(response);
     } catch (IllegalArgumentException e) {
@@ -79,7 +77,7 @@ public ResponseEntity<Void> deleteItemById(@PathVariable String id) {
       if (items.isEmpty()) {
         return ResponseEntity.notFound().build();
       }
-      library.removeMediaItem(uuid, librarian); 
+      library.removeMediaItem(uuid, librarian);
       return ResponseEntity.noContent().build();
     } catch (IllegalArgumentException e) {
       return ResponseEntity.notFound().build();
@@ -98,7 +96,6 @@ public ResponseEntity<Map<String, List<Map<String, String>>>> handleValidationEr
                         "message", fieldError.getDefaultMessage()))
             .toList();
 
-    
     System.out.println("Validation errors: " + errors);
 
     return ResponseEntity.badRequest().body(Map.of("errors", errors));