🎨 Improve file info layout and button styling in GamemasterManager view

code/websites/pokedex.online/src/views/GamemasterManager.vue

@@ -602,6 +602,13 @@ h2 {
   display: flex;
   justify-content: space-between;
   align-items: center;
+  gap: 0.75rem;
+}
+
+.file-info {
+  display: flex;
+  flex-direction: column;
+  flex: 1;
 }
 
 .file-name {
@@ -609,13 +616,17 @@ h2 {
   color: #495057;
   font-size: 0.9rem;
   word-break: break-word;
-  flex: 1;
 }
 
 .file-size {
   color: #999;
   font-size: 0.85rem;
-  margin-left: 0.5rem;
+  margin-top: 0.25rem;
+}
+
+.btn-small {
+  padding: 0.5rem 0.75rem;
+  font-size: 0.9rem;
   white-space: nowrap;
 }