Apply PR review feedback: remove HashMap wrappers and fix KDoc syntax

Co-authored-by: bedaHovorka <5263405+bedaHovorka@users.noreply.github.com>

Author: Copilot

src/test/kotlin/cz/vutbr/fit/interlockSim/context/DefaultRailWayNetGridTest.kt

@@ -55,15 +55,13 @@ private class MockTrackBlock : TrackBlock {
 }
 
 /**
- * Comprehensive unit tests for {@link DefaultRailWayNetGrid}.
+ * Comprehensive unit tests for [DefaultRailWayNetGrid].
  *
- * <p>Coverage:
- * <ul>
- *   <li>Basic operations: put, get, remove, containsKey</li>
- *   <li>Reverse table consistency: cell-to-point mapping integrity</li>
- *   <li>Iterator operations: keySet iteration and removal</li>
- *   <li>Batch operations: putMap for TrackBlockPart collections</li>
- * </ul>
+ * Coverage:
+ * - Basic operations: put, get, remove, containsKey
+ * - Reverse table consistency: cell-to-point mapping integrity
+ * - Iterator operations: keySet iteration and removal
+ * - Batch operations: putMap for TrackBlockPart collections
  */
 @DisplayName("DefaultRailWayNetGrid")
 class DefaultRailWayNetGridTest {
@@ -478,11 +476,11 @@ class DefaultRailWayNetGridTest {
 			val part1 = createTestTrackBlockPart()
 			val part2 = createTestTrackBlockPart()
 			val part3 = createTestTrackBlockPart()
-			val map = java.util.HashMap(mapOf(
+			val map = mapOf(
 				point1 to part1,
 				point2 to part2,
 				point3 to part3
-			))
+			)
 			grid.putMap(map)
 
 			// Act - remove all intermediate cells (simulate removeLine)
@@ -499,7 +497,7 @@ class DefaultRailWayNetGridTest {
 		@DisplayName("putMap with empty map does nothing")
 		fun putMap_emptyMap_doesNothing() {
 			// Act
-			grid.putMap(java.util.HashMap())
+			grid.putMap(emptyMap<Point, TrackBlockPart>())
 
 			// Assert
 			assertThat(grid.isEmpty()).isTrue()