feat(chat): add tests for utility functions (Issue #1190)

[Gimir]

Description:

• cover common.ts, id.ts, conversation.ts

Issues:

• Issue [Tech Debt] cover util-methods by unit tests #1190

Checklist:

• the pull request name complies with Conventional Commits
• the pull request name starts with fix(<scope>):, feat(<scope>):, feature(<scope>):, chore(<scope>):, hotfix(<scope>): or e2e(<scope>):. If contains breaking changes then the pull request name must start with fix(<scope>)!:, feat(<scope>)!:, feature(<scope>)!:, chore(<scope>)!:, hotfix(<scope>)!: or e2e(<scope>)!: where <scope> is name of affected project: chat, chat-e2e, overlay, shared, sandbox-overlay, etc.
• the pull request name ends with (Issue #<TICKET_ID>) (comma-separated list of issues)
• I confirm that do not share any confidential information like API keys or any other secrets and private URLs

[Gimir]

/deploy-review

GitHub actions run: 20566734394

Stage	Status
deploy-review	Failed ❌
matrix.application	Skipped ➖

[Gimir]

/deploy-review

GitHub actions run: 20567524109

Stage	Status
deploy-review	Failed ❌
matrix.application	Skipped ➖

[Gimir]

/deploy-review

GitHub actions run: 20575285519

Stage	Status
deploy-review	Success ✅
chat	Failed ❌
overlay	Success ✅

[Gimir]

/deploy-review

GitHub actions run: 20578991285

Stage	Status
deploy-review	Success ✅
chat	Failed ❌
overlay	Success ✅

[Gimir]

/deploy-review

GitHub actions run: 20595180839

Stage	Status
deploy-review	Success ✅
overlay	Success ✅
chat	Success ✅