fix(record-add): populate field labels from record type schema

[maksimu]

Summary

• Records created via Commander were missing field label metadata, causing blank field names when retrieved through KSM
• record-add used an empty string as default label when the schema had no explicit label override
• Apply the same fix to the importer path for consistency

Root cause

The record type schema for standard fields (e.g. login, password, url) has entries like {"$ref": "login"} with no explicit label. The old code defaulted to '', producing blank labels. The web vault uses the field type as the label in this case.

Fix: rf.get('label', '') → rf.get('label') or ref — use $ref as the default label when no override is defined.

Explicit label overrides (e.g. {"$ref": "text", "label": "cardholderName"} for bank cards) are preserved unchanged.

Files changed

• keepercommander/commands/record_edit.py — RecordAddCommand.execute()
• keepercommander/importer/imp_exp.py — prepare_record_add_or_update()
• tests/test_kc1163_record_field_labels.py — unit tests (7 passing, verified in Docker)

Test plan

• Unit tests pass in Docker (Python 3.11): docker run --entrypoint python ... -m pytest tests/test_kc1163_record_field_labels.py -v → 7 passed
• Standard fields get label == $ref when no override
• Explicit label overrides are preserved
• Regression guard confirms old behavior produced blank labels

Refs: KC-1163