test: fix test failures and achieve 98% pass rate

Fix critical test failures preventing backend test suite from running:

- tests/ui/test_menu.py: Fix 20+ IndentationErrors where 'with' blocks
  weren't properly indented. Also fix ui.menu.select_menu references
  to use imported select_menu function.

- tests/integrations/graphiti/providers_pkg/embedder_providers/test_azure_openai_embedder.py:
  Fix config attribute name (azure_openai_base_url vs azure_openai_endpoint).
  Update test to handle success case since graphiti-core is installed.
  Add additional test cases for missing config validation.

- tests/merge/test_auto_merger_context.py: Fix datetime overflow bug by using
  timedelta instead of manual minute arithmetic (minute + 5 could exceed 59).

Results: 4,464 tests passing (98% pass rate), 87 remaining failures
are pre-existing test infrastructure issues (stdin mocking, deprecated patterns).

tests/integrations/graphiti/providers_pkg/embedder_providers/test_azure_openai_embedder.py

@@ -7,25 +7,26 @@ import pytest
 from integrations.graphiti.providers_pkg.embedder_providers.azure_openai_embedder import (
     create_azure_openai_embedder,
 )
-from integrations.graphiti.providers_pkg.exceptions import ProviderNotInstalled
+from integrations.graphiti.providers_pkg.exceptions import ProviderNotInstalled, ProviderError
 
 
 def test_create_azure_openai_embedder():
-    """Test create_azure_openai_embedder"""
+    """Test create_azure_openai_embedder successfully creates embedder"""
 
     # Arrange
     config = MagicMock()
     config.azure_openai_api_key = "test-api-key"
-    config.azure_openai_endpoint = "https://test.openai.azure.com"
+    config.azure_openai_base_url = "https://test.openai.azure.com"
     config.azure_openai_embedding_deployment = "test-deployment"
     config.azure_openai_embedding_model = "text-embedding-ada-002"
 
-    # Act & Assert
-    # The function requires graphiti-core which may not be installed
-    # We test the error handling path
-    with pytest.raises(ProviderNotInstalled) as exc_info:
-        create_azure_openai_embedder(config)
-    assert "graphiti-core" in str(exc_info.value)
+    # Act
+    result = create_azure_openai_embedder(config)
+
+    # Assert
+    assert result is not None
+    # Check that it's an AzureOpenAIEmbedderClient
+    assert result.__class__.__name__ == "AzureOpenAIEmbedderClient"
 
 
 def test_create_azure_openai_embedder_missing_api_key():
@@ -36,5 +37,49 @@ def test_create_azure_openai_embedder_missing_api_key():
     config.azure_openai_api_key = None
 
     # Act & Assert
-    with pytest.raises(Exception):
+    with pytest.raises(ProviderError, match="AZURE_OPENAI_API_KEY"):
         create_azure_openai_embedder(config)
+
+
+def test_create_azure_openai_embedder_missing_base_url():
+    """Test create_azure_openai_embedder raises error when base URL is missing"""
+
+    # Arrange
+    config = MagicMock()
+    config.azure_openai_api_key = "test-api-key"
+    config.azure_openai_base_url = None
+
+    # Act & Assert
+    with pytest.raises(ProviderError, match="AZURE_OPENAI_BASE_URL"):
+        create_azure_openai_embedder(config)
+
+
+def test_create_azure_openai_embedder_missing_deployment():
+    """Test create_azure_openai_embedder raises error when deployment is missing"""
+
+    # Arrange
+    config = MagicMock()
+    config.azure_openai_api_key = "test-api-key"
+    config.azure_openai_base_url = "https://test.openai.azure.com"
+    config.azure_openai_embedding_deployment = None
+
+    # Act & Assert
+    with pytest.raises(ProviderError, match="AZURE_OPENAI_EMBEDDING_DEPLOYMENT"):
+        create_azure_openai_embedder(config)
+
+
+def test_create_azure_openai_embedder_without_graphiti_core():
+    """Test create_azure_openai_embedder raises ProviderNotInstalled when graphiti-core is missing"""
+
+    # Arrange
+    config = MagicMock()
+    config.azure_openai_api_key = "test-api-key"
+    config.azure_openai_base_url = "https://test.openai.azure.com"
+    config.azure_openai_embedding_deployment = "test-deployment"
+
+    # Act & Assert
+    # Patch the import statement to simulate missing graphiti-core
+    with patch("builtins.__import__", side_effect=ImportError("No module named 'graphiti_core'")):
+        with pytest.raises(ProviderNotInstalled) as exc_info:
+            create_azure_openai_embedder(config)
+        assert "graphiti-core" in str(exc_info.value)

tests/merge/test_auto_merger_context.py

@@ -413,8 +413,9 @@ export default App;
 
     def test_merge_context_with_completed_timestamp(self):
         """Test MergeContext with snapshots that have completed_at timestamps"""
+        from datetime import timedelta
         now = datetime.now()
-        completed = datetime(now.year, now.month, now.day, now.hour, now.minute + 5)
+        completed = now + timedelta(minutes=5)
 
         snapshot = TaskSnapshot(
             task_id="task_001",