diff --git a/src/core/Deal.Modules.Settings/Application/Services/AiGlobalConfigService.cs b/src/core/Deal.Modules.Settings/Application/Services/AiGlobalConfigService.cs
index 28c029e..262ed97 100644
--- a/src/core/Deal.Modules.Settings/Application/Services/AiGlobalConfigService.cs
+++ b/src/core/Deal.Modules.Settings/Application/Services/AiGlobalConfigService.cs
@@ -27,11 +27,8 @@ public sealed class AiGlobalConfigService(IGlobalSettingsStore store, ISecretCip
     // задаёт оператор (остальным облачным адрес фиксирован каталогом, SSRF-гейт).
     private const string CustomProviderId = "custom";
 
-    // Ключи JSON значения aiConfig (camelCase, как пишет SaveAsync).
+    // Ключ JSON значения aiConfig с id провайдера (остальные поля — SettingsFieldKeys).
     private const string ProviderIdProperty = "providerId";
-    private const string ApiKeyProperty = "apiKey";
-    private const string BaseUrlProperty = "baseUrl";
-    private const string ModelProperty = "model";
 
     // Геометрия маски секрета: короткий (≤8) → «x…»; иначе «1234…5678».
     private const int MaskShortMaxLength = 8;
@@ -81,19 +78,19 @@ public sealed class AiGlobalConfigService(IGlobalSettingsStore store, ISecretCip
                 return EmptySnapshot();
             }
 
-            string baseUrl = ReadString(root, BaseUrlProperty);
+            string baseUrl = ReadString(root, SettingsFieldKeys.BaseUrl);
             if (baseUrl.Length == 0 || !IsBaseUrlMutable(meta))
             {
                 baseUrl = meta.Base;
             }
 
-            string model = ReadString(root, ModelProperty);
+            string model = ReadString(root, SettingsFieldKeys.Model);
             if (model.Length == 0)
             {
                 model = meta.Models.FirstOrDefault() ?? string.Empty;
             }
 
-            string apiKey = cipher.Decrypt(ReadString(root, ApiKeyProperty));
+            string apiKey = cipher.Decrypt(ReadString(root, SettingsFieldKeys.ApiKey));
             return new AiGlobalConfigSnapshot(providerId, baseUrl, model, apiKey);
         }
         catch (JsonException)
diff --git a/src/core/tests/Deal.Tests.Unit/Api/AiGlobalConfigServiceTests.cs b/src/core/tests/Deal.Tests.Unit/Api/AiGlobalConfigServiceTests.cs
index a7c3a76..c1e3608 100644
--- a/src/core/tests/Deal.Tests.Unit/Api/AiGlobalConfigServiceTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Api/AiGlobalConfigServiceTests.cs
@@ -116,6 +116,19 @@ public sealed class AiGlobalConfigServiceTests
         Assert.False(snapshot.Configured);
     }
 
+    [Fact]
+    public async Task GetSnapshotAsync_BrokenCiphertext_LeavesKeyEmptyWithoutThrowing()
+    {
+        _store.Preload(
+            GlobalSettingsKeys.AiConfig,
+            "{\"providerId\":\"deepseek\",\"baseUrl\":\"\",\"model\":\"\",\"apiKey\":\"enc:не-base64!\"}");
+
+        AiGlobalConfigSnapshot snapshot = await _service.GetSnapshotAsync(CancellationToken.None);
+
+        Assert.Equal(string.Empty, snapshot.ApiKey);
+        Assert.False(snapshot.Configured);
+    }
+
     [Theory]
     [InlineData("sk-operator-key-123", true)]
     [InlineData("sk-1…-123", false)]   // маска из снимка