Fix Codex review findings on PR 89: station row key, map selection, sort after filter

- Station row key now includes the chat category, so the same callsign in two
  categories no longer collides.
- Map marker click and Reset view go through the central station selection.
- Sorting now operates on the filtered rows, so filters stay effective.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app-desktop/src/main/java/kst4contest/view/Kst4ContestApplication.java

@@ -3034,7 +3034,8 @@ public class Kst4ContestApplication implements StatusUpdateListener, SettingsHos
 						member -> parseTableDouble(formatPriorityScore(member)),
 						(member, band, worked) -> formatBandCellStatus(member, band, worked),
 						BandOpportunityResolver.getEnabledStationBands(chatcontroller.getChatPreferences())),
-				RowKeys.INSTANCE.byValue(ChatMember::getCallSign),
+				RowKeys.INSTANCE.byValue(member -> member.getCallSign() + "|"
+						+ (member.getChatCategory() == null ? "" : member.getChatCategory().getCategoryNumber())),
 				"compose-stations",
 				widths);
 
@@ -3222,6 +3223,11 @@ public class Kst4ContestApplication implements StatusUpdateListener, SettingsHos
 		composeMemberListener = rows -> uiDispatcher.runOnUi(() -> stations.replaceRows(rows));
 		chatcontroller.getLst_chatMemberList().addListener(composeMemberListener);
 
+		composeMainWindowState.setStationSelector(member -> {
+			selectStationInCompose(selectedStation, stations, member);
+			return kotlin.Unit.INSTANCE;
+		});
+
 		composeChatListener = rows -> uiDispatcher.runOnUi(() -> {
 			directed.replaceRows(chatcontroller.toMeMessages());
 			publicMessages.replaceRows(rows);

app-desktop/src/main/kotlin/kst4contest/view/compose/DataTableState.kt

@@ -318,12 +318,12 @@ class DataTableState<T>(
                  * rows jump.
                  */
                 val order = column.comparator
-                    ?: compareBy(currentRows.associateWith { column.value(it) }::getValue)
+                    ?: compareBy(filteredRows.associateWith { column.value(it) }::getValue)
 
                 if (ascending) {
-                    currentRows.sortedWith(order)
+                    filteredRows.sortedWith(order)
                 } else {
-                    currentRows.sortedWith(order.reversed())
+                    filteredRows.sortedWith(order.reversed())
                 }
             }
 

app-desktop/src/main/kotlin/kst4contest/view/compose/MainWindowState.kt

@@ -62,6 +62,13 @@ class MainWindowState(
 ) {
 
     /** The shortcut buttons above the send line. */
+    /**
+     * The one path that selects a station for the whole application (panel, table, score
+     * service, send line). Set by the host after construction; other windows, such as the
+     * map, go through it instead of touching [selectedStation] alone. Null clears.
+     */
+    var stationSelector: ((ChatMember?) -> Unit)? = null
+
     val shortcuts = RosterMirror(prefs.getLst_txtShortCutBtnList())
 
     /** The snippets behind Ctrl+1..Ctrl+0 and the right-click menus. */

app-desktop/src/main/kotlin/kst4contest/view/compose/map/StationMapWindow.kt

@@ -217,7 +217,8 @@ object StationMapWindow {
                     }
 
                     kst4contest.view.compose.Form.button(strings.mapResetView) {
-                        mainWindowState.selectedStation.select(null)
+                        mainWindowState.stationSelector?.invoke(null)
+                            ?: mainWindowState.selectedStation.select(null)
                         val home = runCatching {
                             kst4contest.locatorUtils.Location(ownLocator6)
                         }.getOrNull()
@@ -277,10 +278,22 @@ object StationMapWindow {
                             darkMode = isDarkTheme,
                             onMarkerClicked = { snapshot ->
                                 val chatController = ApplicationRuntimeLauncher.getCurrent()?.chatController
-                                val member = chatController?.lst_chatMemberList?.snapshot()?.find { it.callSignRaw == snapshot.callSignRaw() }
+                                val variants = chatController?.lst_chatMemberList?.snapshot()
+                                    ?.filter { it.callSignRaw == snapshot.callSignRaw() }
+                                    .orEmpty()
+                                /*
+                                 * A marker stands for a raw callsign, not a category. Keep the
+                                 * category already selected when it is one of the variants.
+                                 */
+                                val member = variants.firstOrNull { it === mainWindowState.selectedStation.selected }
+                                    ?: variants.firstOrNull()
                                 if (member != null) {
-                                    mainWindowState.selectedStation.select(member)
-                                    
+                                    val selector = mainWindowState.stationSelector
+                                    if (selector != null) {
+                                        selector(member)
+                                    } else {
+                                        mainWindowState.selectedStation.select(member)
+                                    }
                                     // Mirror old JavaFX handleMapCallsignSelection logic: prefill /cq
                                     mainWindowState.chatInput.prepareCq(member.callSign ?: "", forceOverwrite = true)
                                 }