Add audit logging for Zeitplan updates, implement conflict validation for overlapping schedules and judge assignments, and enhance frontend with detailed warning visualizations in Zeitplan tab.

backend/services/entries/entries-service/src/main/kotlin/at/mocode/entries/service/bewerbe/BewerbService.kt

@@ -6,7 +6,9 @@ import at.mocode.entries.domain.model.RichterEinsatz
 import at.mocode.entries.domain.repository.NennungRepository
 import at.mocode.entries.domain.service.CompetitionWarningService
 import at.mocode.entries.service.errors.LockedException
+import at.mocode.entries.service.persistence.AuditLogTable
 import at.mocode.entries.service.persistence.TurnierTable
+import org.jetbrains.exposed.v1.jdbc.insert
 import at.mocode.entries.service.tenant.tenantTransaction
 import org.jetbrains.exposed.v1.core.eq
 import org.jetbrains.exposed.v1.jdbc.selectAll
@@ -162,6 +164,18 @@ class BewerbService(
       beginnZeit = req.beginnZeit,
       austragungsplatzId = req.austragungsplatzId?.let { Uuid.parse(it) }
     )
+
+    tenantTransaction {
+      // Audit-Log schreiben
+      AuditLogTable.insert {
+        it[entityType] = "BEWERB"
+        it[entityId] = id.toJavaUuid()
+        it[action] = "UPDATE_ZEITPLAN"
+        it[timestamp] = kotlin.time.Clock.System.now()
+        it[changesJson] = "{\"old\": {\"datum\": \"${current.geplantesDatum}\", \"zeit\": \"${current.beginnZeit}\", \"platz\": \"${current.austragungsplatzId}\"}, \"new\": {\"datum\": \"${updated.geplantesDatum}\", \"zeit\": \"${updated.beginnZeit}\", \"platz\": \"${updated.austragungsplatzId}\"}}"
+      }
+    }
+
     return repo.update(updated)
   }
 

backend/services/entries/entries-service/src/main/kotlin/at/mocode/entries/service/bewerbe/BewerbeController.kt

@@ -261,7 +261,9 @@ class BewerbeController(
 
   @PatchMapping("/bewerbe/{id}/zeitplan")
   suspend fun updateZeitplan(@PathVariable id: String, @RequestBody body: UpdateZeitplanRequest): BewerbResponse {
-    val b = service.updateZeitplan(Uuid.parse(id), body)
-    return domainToDto(b)
+    val uuid = Uuid.parse(id)
+    val b = service.updateZeitplan(uuid, body)
+    val warnungen = service.validateBewerb(uuid)
+    return domainToDto(b, warnungen)
   }
 }

backend/services/entries/entries-service/src/main/kotlin/at/mocode/entries/service/persistence/AuditLogTable.kt

@@ -0,0 +1,23 @@
+package at.mocode.entries.service.persistence
+
+import org.jetbrains.exposed.v1.core.Table
+import org.jetbrains.exposed.v1.core.java.javaUUID
+import org.jetbrains.exposed.v1.datetime.timestamp
+import kotlin.time.Instant
+
+object AuditLogTable : Table("audit_log") {
+    val id = javaUUID("id").autoGenerate()
+    val entityType = varchar("entity_type", 50)
+    val entityId = javaUUID("entity_id")
+    val action = varchar("action", 50)
+    val userId = javaUUID("user_id").nullable()
+    val timestamp = timestamp("timestamp")
+    val changesJson = text("changes_json").nullable()
+
+    override val primaryKey = PrimaryKey(id)
+
+    init {
+        index(false, entityId)
+        index(false, timestamp)
+    }
+}