修复用户角色替换的软删除冲突

src/Infrastructure/TakeoutSaaS.Infrastructure/Identity/Persistence/EfUserRoleRepository.cs

@@ -61,19 +61,40 @@ public sealed class EfUserRoleRepository(IdentityDbContext dbContext) : IUserRol
                 .Where(x => x.TenantId == tenantId && x.UserId == userId)
                 .ToListAsync(cancellationToken);
 
-            // 3. 清空并保存
-            dbContext.UserRoles.RemoveRange(existing);
-            await dbContext.SaveChangesAsync(cancellationToken);
+            // 3. 去重并构建目标集合
+            var targetRoleIds = roleIds.Distinct().ToArray();
+            var targetRoleSet = targetRoleIds.ToHashSet();
+            var existingRoleMap = existing.ToDictionary(x => x.RoleId);
 
-            // 4. 构建新映射
-            var toAdd = roleIds.Distinct().Select(roleId => new UserRole
+            // 4. 同步现有映射状态（软删除或恢复）
+            foreach (var mapping in existing)
             {
-                TenantId = tenantId,
-                UserId = userId,
-                RoleId = roleId
-            });
+                if (targetRoleSet.Contains(mapping.RoleId))
+                {
+                    if (mapping.DeletedAt.HasValue)
+                    {
+                        mapping.DeletedAt = null;
+                        mapping.DeletedBy = null;
+                    }
+                    continue;
+                }
+
+                if (!mapping.DeletedAt.HasValue)
+                {
+                    dbContext.UserRoles.Remove(mapping);
+                }
+            }
+
+            // 5. 补齐新增角色映射
+            var toAdd = targetRoleIds
+                .Where(roleId => !existingRoleMap.ContainsKey(roleId))
+                .Select(roleId => new UserRole
+                {
+                    TenantId = tenantId,
+                    UserId = userId,
+                    RoleId = roleId
+                });
 
-            // 5. 批量新增并保存
             await dbContext.UserRoles.AddRangeAsync(toAdd, cancellationToken);
             await dbContext.SaveChangesAsync(cancellationToken);