feat(CalendarView): merge recurring training slots and enhance event filtering

- Implemented a new method to merge recurring training slots with identical weekdays and time windows, improving calendar event management.
- Updated event filtering logic to exclude cancelled training sessions, ensuring only relevant training events are displayed.
- Enhanced the loading process to handle source errors more effectively, improving user experience in the CalendarView.

mobile-app/composeApp/src/androidMain/kotlin/de/tt_tagebuch/app/AppDependencies.kt

@@ -6,6 +6,7 @@ import android.net.Uri
 import de.tt_tagebuch.shared.api.AccidentApi
 import de.tt_tagebuch.shared.api.ApiLogsApi
 import de.tt_tagebuch.shared.api.ClubApprovalsApi
+import de.tt_tagebuch.shared.api.ClickTtAccountApi
 import de.tt_tagebuch.shared.api.ApiConfig
 import de.tt_tagebuch.shared.api.AuthApi
 import de.tt_tagebuch.shared.api.PublicAuthApi
@@ -22,6 +23,7 @@ import de.tt_tagebuch.shared.api.MemberActivitiesApi
 import de.tt_tagebuch.shared.api.MemberGroupPhotosApi
 import de.tt_tagebuch.shared.api.MemberTransferConfigApi
 import de.tt_tagebuch.shared.api.MembersApi
+import de.tt_tagebuch.shared.api.MyTischtennisApi
 import de.tt_tagebuch.shared.api.OfficialTournamentsApi
 import de.tt_tagebuch.shared.api.PermissionsApi
 import de.tt_tagebuch.shared.api.SessionApi
@@ -101,6 +103,8 @@ class AppDependencies(context: Context) {
     val clubInternalTournamentsManager = ClubInternalTournamentsManager(TournamentsApi(client))
     val officialTournamentsReadManager = OfficialTournamentsReadManager(OfficialTournamentsApi(client))
     val memberTransferConfigApi = MemberTransferConfigApi(client)
+    val myTischtennisApi = MyTischtennisApi(client)
+    val clickTtAccountApi = ClickTtAccountApi(client)
 
     val diaryManager = DiaryManager(
         DiaryApi(client),

mobile-app/composeApp/src/androidMain/kotlin/de/tt_tagebuch/app/ui/ClubSettingsScreens.kt

@@ -122,15 +122,18 @@ private fun parseClockToApi(raw: String): String? {
     return h.toString().padStart(2, '0') + ":" + m.toString().padStart(2, '0')
 }
 
-private fun trainingWeekdayLabel(tr: (String, String) -> String, weekday: Int): String = when (weekday) {
-    0 -> tr("trainingTimesTab.sunday", "Sonntag")
-    1 -> tr("trainingTimesTab.monday", "Montag")
-    2 -> tr("trainingTimesTab.tuesday", "Dienstag")
-    3 -> tr("trainingTimesTab.wednesday", "Mittwoch")
-    4 -> tr("trainingTimesTab.thursday", "Donnerstag")
-    5 -> tr("trainingTimesTab.friday", "Freitag")
-    6 -> tr("trainingTimesTab.saturday", "Samstag")
-    else -> ""
+private fun trainingWeekdayLabel(languageCode: String, weekday: Int): String {
+    fun g(key: String, fb: String) = MobileStrings.get(languageCode, key, fb)
+    return when (weekday) {
+        0 -> g("trainingTimesTab.sunday", "Sonntag")
+        1 -> g("trainingTimesTab.monday", "Montag")
+        2 -> g("trainingTimesTab.tuesday", "Dienstag")
+        3 -> g("trainingTimesTab.wednesday", "Mittwoch")
+        4 -> g("trainingTimesTab.thursday", "Donnerstag")
+        5 -> g("trainingTimesTab.friday", "Freitag")
+        6 -> g("trainingTimesTab.saturday", "Samstag")
+        else -> ""
+    }
 }
 
 private fun trainingGroupMemberLabel(m: TrainingGroupMemberBrief): String {
@@ -519,7 +522,6 @@ internal fun MobileClubSettingsScreen(dependencies: AppDependencies, onBack: ()
     }
 }
 
-@Composable
 @Composable
 private fun ClubTrainingGroupsTabContent(
     dependencies: AppDependencies,
@@ -818,16 +820,16 @@ private fun ClubTrainingTimesTabContent(
         loading = false
     }
 
-    if (loading) {
-        Text(tr("trainingTimesTab.loading", "Lade Trainingszeiten..."), modifier = Modifier.padding(top = 24.dp))
-        return
-    }
-    if (error != null) {
-        Text(error!!, color = MaterialTheme.colors.error)
-        return
-    }
-
-    LazyColumn(verticalArrangement = Arrangement.spacedBy(16.dp)) {
+    Column(modifier = Modifier.fillMaxSize()) {
+        error?.let {
+            Text(it, color = MaterialTheme.colors.error, modifier = Modifier.padding(bottom = 8.dp))
+        }
+        when {
+            loading -> CircularProgressIndicator(modifier = Modifier.padding(top = 24.dp))
+            else -> LazyColumn(
+                modifier = Modifier.fillMaxSize(),
+                verticalArrangement = Arrangement.spacedBy(16.dp),
+            ) {
         items(groups, key = { it.id }) { g ->
             Card(modifier = Modifier.fillMaxWidth(), elevation = ClubSettingsCardElev) {
                 Column(Modifier.padding(12.dp)) {
@@ -852,7 +854,7 @@ private fun ClubTrainingTimesTabContent(
                             Text(tr("trainingTimesTab.weekday", "Wochentag:"), style = MaterialTheme.typography.caption)
                             Box {
                                 TextButton(onClick = { weekdayMenuNew = true }) {
-                                    Text(trainingWeekdayLabel(tr, newWeekday))
+                                    Text(trainingWeekdayLabel(languageCode, newWeekday))
                                 }
                                 DropdownMenu(expanded = weekdayMenuNew, onDismissRequest = { weekdayMenuNew = false }) {
                                     (0..6).forEach { d ->
@@ -861,7 +863,7 @@ private fun ClubTrainingTimesTabContent(
                                                 newWeekday = d
                                                 weekdayMenuNew = false
                                             },
-                                        ) { Text(trainingWeekdayLabel(tr, d)) }
+                                        ) { Text(trainingWeekdayLabel(languageCode, d)) }
                                     }
                                 }
                             }
@@ -926,7 +928,7 @@ private fun ClubTrainingTimesTabContent(
                                     verticalAlignment = Alignment.CenterVertically,
                                 ) {
                                     Column(modifier = Modifier.weight(1f)) {
-                                        Text(trainingWeekdayLabel(tr, t.weekday), fontWeight = FontWeight.Medium)
+                                        Text(trainingWeekdayLabel(languageCode, t.weekday), fontWeight = FontWeight.Medium)
                                         Text("${formatTimeDisplay(t.startTime)} – ${formatTimeDisplay(t.endTime)}")
                                     }
                                     if (canWrite) {
@@ -951,6 +953,8 @@ private fun ClubTrainingTimesTabContent(
                 }
             }
         }
+        }
+    }
     }
 
     if (editing != null) {
@@ -963,7 +967,7 @@ private fun ClubTrainingTimesTabContent(
                     Text(tr("trainingTimesTab.weekday", "Wochentag:"), style = MaterialTheme.typography.caption)
                     Box {
                         TextButton(onClick = { weekdayMenuEdit = true }) {
-                            Text(trainingWeekdayLabel(tr, editWeekday))
+                            Text(trainingWeekdayLabel(languageCode, editWeekday))
                         }
                         DropdownMenu(expanded = weekdayMenuEdit, onDismissRequest = { weekdayMenuEdit = false }) {
                             (0..6).forEach { d ->
@@ -972,7 +976,7 @@ private fun ClubTrainingTimesTabContent(
                                         editWeekday = d
                                         weekdayMenuEdit = false
                                     },
-                                ) { Text(trainingWeekdayLabel(tr, d)) }
+                                ) { Text(trainingWeekdayLabel(languageCode, d)) }
                             }
                         }
                     }