feat(ui): Display staff in single card with aligned columns

Replace per-staff cards with a single card listing all staff. Each
line shows the name on the left and role in muted color on the right,
matching the players section style.

composeApp/src/commonMain/kotlin/ch/parano/myice/ui/screens/EventDetailScreen.kt

@@ -189,12 +189,22 @@ fun EventDetailScreen(
                                 style = MaterialTheme.typography.titleLarge,
                             )
                         }
-                        items(detail.convocation.staff) { staff ->
+                        item {
                             Card(modifier = Modifier.fillMaxWidth()) {
-                                Text(
+                                Column(modifier = Modifier.padding(16.dp)) {
-                                    text = "${staff.role}: ${staff.fname} ${staff.lname}",
+                                    detail.convocation.staff.forEach { staff ->
-                                    modifier = Modifier.padding(16.dp),
+                                        val muted = MaterialTheme.colorScheme.onSurfaceVariant
-                                )
+                                        Row(
+                                            verticalAlignment = Alignment.CenterVertically,
+                                            horizontalArrangement = Arrangement.spacedBy(6.dp),
+                                            modifier = Modifier.fillMaxWidth(),
+                                        ) {
+                                            Text("${staff.fname} ${staff.lname}")
+                                            Spacer(Modifier.weight(1f))
+                                            Text(staff.role, color = muted)
+                                        }
+                                    }
+                                }
                             }
                         }
                     }