feat: подробное отображение ошибок синхронизации

backend/UniVerse.Infrastructure/ExternalServices/ModeusApiClient.cs

@@ -23,7 +23,8 @@ public class ModeusApiClient : IModeusApiClient
     {
         var body = new { specialtyCode = request.SpecialtyCode, timeMin = request.TimeMin, timeMax = request.TimeMax, typeId = request.TypeId };
         var response = await _http.PostAsJsonAsync("/api/proxy/events/search", body);
-        response.EnsureSuccessStatusCode();
+        await EnsureSuccessAsync(response, "Modeus events search",
+            $"specialtyCode={request.SpecialtyCode ?? "<empty>"}, timeMin={request.TimeMin:O}, timeMax={request.TimeMax:O}, typeId=[{string.Join(", ", request.TypeId ?? [])}]");
         return await response.Content.ReadFromJsonAsync<ModeusEventsResponse>() ?? new(new());
     }
 
@@ -46,7 +47,8 @@ public class ModeusApiClient : IModeusApiClient
             };
 
             var response = await _http.PostAsJsonAsync("/api/proxy/rooms/search", body);
-            response.EnsureSuccessStatusCode();
+            await EnsureSuccessAsync(response, "Modeus rooms search",
+                $"name=<empty>, sort=+building.name,+name, size={pageSize}, page={page}, deleted=false");
 
             var payload = await response.Content.ReadFromJsonAsync<ModeusRoomsResponse>() ?? new ModeusRoomsResponse();
             allRooms.AddRange(payload.RoomItems);
@@ -59,6 +61,20 @@ public class ModeusApiClient : IModeusApiClient
         return new ModeusRoomsResponse { Rooms = allRooms };
     }
 
+    private static async Task EnsureSuccessAsync(HttpResponseMessage response, string operation, string requestSummary)
+    {
+        if (response.IsSuccessStatusCode) return;
+
+        var responseBody = await response.Content.ReadAsStringAsync();
+        if (responseBody.Length > 2000)
+            responseBody = string.Concat(responseBody.AsSpan(0, 2000), "...<truncated>");
+
+        throw new HttpRequestException(
+            $"{operation} failed with HTTP {(int)response.StatusCode} {response.ReasonPhrase}. Request: {requestSummary}. Response body: {responseBody}",
+            null,
+            response.StatusCode);
+    }
+
     public async Task<List<ModeusEmployee>> SearchEmployeeAsync(string fullname)
     {
         var response = await _http.GetFromJsonAsync<List<ModeusEmployee>>(

backend/UniVerse.Infrastructure/Services/ScheduleSyncService.cs

@@ -21,6 +21,7 @@ public class ScheduleSyncService : IScheduleSyncService
 
     public async Task<SyncResultDto> SyncScheduleAsync(SyncScheduleRequest request)
     {
+        const string stage = "schedule";
         int created = 0, updated = 0, skipped = 0;
         try
         {
@@ -45,7 +46,18 @@ public class ScheduleSyncService : IScheduleSyncService
         catch (Exception ex)
         {
             _logger.LogError(ex, "Schedule sync failed");
-            var result = new SyncResultDto(created, updated, skipped, ex.Message);
+            var result = new SyncResultDto(created, updated, skipped, ex.Message, BuildErrorDetails(
+                ex,
+                stage,
+                created,
+                updated,
+                skipped,
+                [
+                    $"specialtyCode={request.SpecialtyCode ?? "<empty>"}",
+                    $"timeMin={request.TimeMin:O}",
+                    $"timeMax={request.TimeMax:O}",
+                    $"typeId=[{string.Join(", ", request.TypeId ?? [])}]"
+                ]));
             _lastStatus = new SyncStatusDto(DateTime.UtcNow, "failed", result);
             return result;
         }
@@ -53,6 +65,7 @@ public class ScheduleSyncService : IScheduleSyncService
 
     public async Task<SyncResultDto> SyncRoomsAsync()
     {
+        const string stage = "rooms";
         int created = 0, updated = 0, skipped = 0;
         try
         {
@@ -96,7 +109,13 @@ public class ScheduleSyncService : IScheduleSyncService
         catch (Exception ex)
         {
             _logger.LogError(ex, "Rooms sync failed");
-            var result = new SyncResultDto(created, updated, skipped, ex.Message);
+            var result = new SyncResultDto(created, updated, skipped, ex.Message, BuildErrorDetails(
+                ex,
+                stage,
+                created,
+                updated,
+                skipped,
+                ["request=name:<empty>, sort:+building.name,+name, deleted:false, page size:100"]));
             _lastStatus = new SyncStatusDto(DateTime.UtcNow, "failed", result);
             return result;
         }
@@ -109,4 +128,30 @@ public class ScheduleSyncService : IScheduleSyncService
     }
 
     public Task<SyncStatusDto> GetLastSyncStatusAsync() => Task.FromResult(_lastStatus);
+
+    private static IReadOnlyList<string> BuildErrorDetails(
+        Exception exception,
+        string stage,
+        int created,
+        int updated,
+        int skipped,
+        IReadOnlyList<string> context)
+    {
+        var details = new List<string>
+        {
+            $"stage={stage}",
+            $"exceptionType={exception.GetType().FullName}",
+            $"message={exception.Message}",
+            $"partialResult=created:{created}, updated:{updated}, skipped:{skipped}"
+        };
+
+        if (exception is HttpRequestException httpException && httpException.StatusCode.HasValue)
+            details.Add($"httpStatus={(int)httpException.StatusCode.Value} {httpException.StatusCode.Value}");
+
+        if (exception.InnerException != null)
+            details.Add($"innerException={exception.InnerException.GetType().FullName}: {exception.InnerException.Message}");
+
+        details.AddRange(context);
+        return details;
+    }
 }