Organize imports and clean up exceptions: remove unused imports across multiple modules, replace exception variable usage with wildcard, and improve code readability.

frontend/features/turnier-feature/src/jvmMain/kotlin/at/mocode/turnier/feature/presentation/TurnierStammdatenTab.kt

@@ -14,7 +14,6 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.sun.tools.javac.code.Type
 import java.time.LocalDate
 
 private val PrimaryBlue = Color(0xFF1E3A8A)
@@ -109,7 +108,7 @@ fun StammdatenTabContent(
         znsField.isAccessible = true
         znsDataLoaded = znsField.get(turnier) as Boolean
       }
-    } catch (e: Exception) {
+    } catch (_: Exception) {
       // Reflection fehlgeschlagen oder Store nicht erreichbar -> Fallback auf leere Felder
     }
   }
@@ -428,7 +427,7 @@ fun StammdatenTabContent(
               val tB = if (bis.isBlank()) tV else LocalDate.parse(bis)
               !tV.isBefore(evV) && !tB.isAfter(evB) && !tB.isBefore(tV)
             }
-          } catch (e: Exception) { false }
+          } catch (_: Exception) { false }
         }
         AssistChip(onClick = {}, label = { Text("Datum gültig") }, leadingIcon = {
           Icon(if (dateOk) Icons.Default.Check else Icons.Default.Close, null, tint = if (dateOk) Color(0xFF2E7D32) else MaterialTheme.colorScheme.error)
@@ -447,7 +446,7 @@ fun StammdatenTabContent(
               val tB = if (bis.isBlank()) tV else LocalDate.parse(bis)
               !tV.isBefore(evV) && !tB.isAfter(evB) && !tB.isBefore(tV)
             }
-          } catch (e: Exception) { false }
+          } catch (_: Exception) { false }
           base && dateValid
         },
         colors = ButtonDefaults.buttonColors(containerColor = PrimaryBlue),