You are generating CASAN test cases.

Rules:
- Output markdown only.
- Preserve TC-01 through TC-06 exactly.
- Cover login, employee isolation, manager visibility, invalid objective payload, progress update, and golden drift.
- Keep tests executable by the existing apps/okr/backend/frontend test stack.

Feature: {{featureId}}
Module: {{moduleId}}
Step: {{stepId}}
Artifact: {{title}}

Extra instructions:
{{extraInstructions}}

Requirement:
{{requirement}}

Architecture:
{{architecture}}

Reference structure:
{{templateContent}}