test(Common): add tests for Types/AI/AIChatPermissionModeHelper

[suvvvv]

What

Adds unit tests for AIChatPermissionModeHelper in Common/Types/AI/AIChatPermissionMode.ts, which previously had no test coverage.

This enum gates whether the AI chat agent may run mutating tools (create/acknowledge/resolve incidents and alerts). It's persisted per-conversation on AIConversation.permissionMode and enforced in ChatAgentRunner, so its parsing behaviour is security-relevant.

Covered:

• getDefault — returns AskForApproval, and explicitly asserts it is not the permissive AutoRun.
• isValid — accepts every mode; rejects undefined, empty string, wrong casing, trailing whitespace, and unknown values.
• parse — round-trips every valid mode and falls back to the default for unrecognized input. Includes a fail-safe invariant: a malformed or missing persisted value must never resolve to AutoRun, so a bad column value can't silently let the agent mutate project data without approval.
• getOptions — exposes exactly one option per mode (no duplicates, none missing), each with a non-empty title and description, and every offered option is itself parseable.

Why

Improves test coverage for the Common/Types utilities (part of the broader test-coverage effort). The fail-safe and option-completeness invariants guard the permission gate as new modes get added.

Testing

node node_modules/.bin/jest --runInBand ./Tests/Types/AI/AIChatPermissionMode.test.ts

All 17 tests pass. Prettier- and eslint-clean.

[simlarsen]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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