fix: keep group page working when attestations fail

- tolerate legacy textual semester values from older progress-service responses
- treat attestations as optional data on the group page and log loading failures instead of returning 500

web/src/main/kotlin/ru/ysu/lms/web/AttestationPresentation.kt

@@ -43,6 +43,13 @@ object AttestationPresentation {
 
     fun kindLabel(kind: String): String = KIND_LABELS[kind] ?: kind
 
+    /** Понимает и «2», и старые значения вроде «2 семестр»; вне 1–8 — 1. */
+    fun semesterNumber(raw: String): Int {
+        val digits = raw.filter { it.isDigit() }
+        val value = digits.toIntOrNull() ?: return 1
+        return if (value in 1..8) value else 1
+    }
+
     fun valueLabel(
         kind: String,
         value: String,

web/src/main/kotlin/ru/ysu/lms/web/admin/AdminGroupController.kt

@@ -1,6 +1,7 @@
 package ru.ysu.lms.web.admin
 
 import jakarta.servlet.http.HttpSession
+import org.slf4j.LoggerFactory
 import org.springframework.http.HttpHeaders
 import org.springframework.http.MediaType
 import org.springframework.http.ResponseEntity
@@ -59,6 +60,8 @@ class AdminGroupController(
     markdown: MarkdownRenderer,
     mapper: ObjectMapper,
 ) : AdminSupport(api, markdown, mapper) {
+    private val log = LoggerFactory.getLogger(AdminGroupController::class.java)
+
     @GetMapping
     fun dashboard(
         session: HttpSession,
@@ -143,7 +146,7 @@ class AdminGroupController(
         val allLabs = api.listLabs(t)
         val group = api.groupDetail(t, id)
         val labs = allLabs.filter { it.status == "published" }
-        val attestations = GroupAttestationViews.columns(api.listAttestations(t, id))
+        val attestations = loadAttestations(t, id)
         val grades = api.listGrades(t)
         val gradeBy = grades.associate { "${it.studentId}|${it.labId}" to it.score }
         val generalCommentBy = grades.associate { "${it.studentId}|${it.labId}" to it.generalComment }
@@ -260,6 +263,17 @@ class AdminGroupController(
             )
         }
 
+    /** Аттестации не должны ронять всю ведомость, если сервис ещё не обновлён. */
+    private fun loadAttestations(
+        token: String,
+        groupId: String,
+    ): List<GroupAttestation> =
+        GroupAttestationViews.columns(
+            runCatching { api.listAttestations(token, groupId) }
+                .onFailure { log.warn("Не удалось загрузить аттестации группы {}", groupId, it) }
+                .getOrDefault(emptyList()),
+        )
+
     private fun averageScore(cells: List<GroupLabCell>): String? {
         val scores = cells.mapNotNull { it.score?.replace(',', '.')?.toBigDecimalOrNull() }
         if (scores.isEmpty()) return null

web/src/main/kotlin/ru/ysu/lms/web/admin/GroupAttestationViews.kt

@@ -18,7 +18,7 @@ object GroupAttestationViews {
                 id = column.id,
                 kind = column.kind,
                 kindLabel = AttestationPresentation.kindLabel(column.kind),
-                semester = column.semester,
+                semester = AttestationPresentation.semesterNumber(column.semester),
                 published = column.published,
                 options =
                     VALUES_BY_KIND[column.kind].orEmpty().map { value ->

web/src/main/kotlin/ru/ysu/lms/web/api/ApiDtos.kt

@@ -275,7 +275,8 @@ data class AttestationDto(
     val id: String = "",
     val groupId: String = "",
     val kind: String = "",
-    val semester: Int = 1,
+    /** Строка — чтобы старые ответы с текстовым семестром не ломали разбор. */
+    val semester: String = "1",
     val published: Boolean = false,
     val results: List<AttestationResultDto> = emptyList(),
 )

web/src/main/kotlin/ru/ysu/lms/web/student/StudentController.kt

@@ -94,7 +94,7 @@ class StudentController(
                 val result = column.results.firstOrNull()
                 StudentAttestationView(
                     kindLabel = AttestationPresentation.kindLabel(column.kind),
-                    semester = column.semester,
+                    semester = AttestationPresentation.semesterNumber(column.semester),
                     valueLabel = result?.let { AttestationPresentation.valueLabel(column.kind, it.value) } ?: "—",
                     positive = result?.let { AttestationPresentation.isPositive(column.kind, it.value) },
                 )