test(views): add user-mode coverage tests and fix dashboard helper duplication

- Add tests for user-mode with invalid JSON config (covers exception handling path)
- Add tests for user-mode with valid config (verifies folder path pre-population)
- Extract _watchFolderOAuthSource() helper to reduce isOAuthType/oauthLink duplication

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

tests/test_views_onedrive.py

@@ -1,7 +1,12 @@
 """Tests for app/views/onedrive.py module."""
 
+import json
+from unittest.mock import patch
+
 import pytest
 
+from app.models import UserIntegration
+
 
 @pytest.mark.integration
 class TestOnedriveViews:
@@ -42,3 +47,47 @@ class TestOnedriveViews:
         body = response.text
         assert "oauth_integration_id" in body
         assert 'const integrationId = ""' in body
+
+    def test_onedrive_setup_user_mode_invalid_json_config(self, client, db_session):
+        """Test user-mode renders correctly when integration.config is invalid JSON."""
+        owner_id = "user_od_invalid_json@example.com"
+        integration = UserIntegration(
+            owner_id=owner_id,
+            direction="DESTINATION",
+            integration_type="ONEDRIVE",
+            name="My OneDrive (bad cfg)",
+            config="{INVALID JSON}",
+            is_active=True,
+        )
+        db_session.add(integration)
+        db_session.commit()
+        db_session.refresh(integration)
+
+        with patch("app.views.onedrive.get_current_owner_id", return_value=owner_id):
+            response = client.get(f"/onedrive-setup?integration_id={integration.id}")
+
+        assert response.status_code == 200
+        # Should render user mode without errors despite the bad config
+        assert b"Back to Integrations" in response.content
+
+    def test_onedrive_setup_user_mode_valid_config(self, client, db_session):
+        """Test user-mode correctly loads folder path from integration config."""
+        owner_id = "user_od_valid_cfg@example.com"
+        integration = UserIntegration(
+            owner_id=owner_id,
+            direction="DESTINATION",
+            integration_type="ONEDRIVE",
+            name="My OneDrive",
+            config=json.dumps({"folder_path": "Documents/Archive"}),
+            is_active=True,
+        )
+        db_session.add(integration)
+        db_session.commit()
+        db_session.refresh(integration)
+
+        with patch("app.views.onedrive.get_current_owner_id", return_value=owner_id):
+            response = client.get(f"/onedrive-setup?integration_id={integration.id}")
+
+        assert response.status_code == 200
+        assert b"Documents/Archive" in response.content
+        assert b"Back to Integrations" in response.content