https://sonarly.com/issue/19866?type=bug
The `deep-equal` v2.2.3 library crashes with `TypeError: iterator must be a function` when comparing record objects received via SSE update events on the companies page, causing an unhandled error during optimistic cache updates.
Fix: Replaced `deep-equal` v2.2.3 with `fast-deep-equal` in the `isDeeplyEqual` utility and all direct usages.
`deep-equal` has a complex dependency chain (`which-typed-array` → `for-each` → `is-callable`) that crashes with `TypeError: iterator must be a function` when encountering certain object shapes during type introspection. `fast-deep-equal` is a much simpler, faster alternative that handles plain JSON objects (which is all record data consists of) without the complex type-detection logic that causes this crash.
Changes:
1. **`isDeeplyEqual.ts`**: Replaced `deep-equal` import with `fast-deep-equal`. Removed the unused `options` parameter (only 2 callers passed `{ strict: true }`, and `fast-deep-equal` always uses strict comparison).
2. **`triggerUpdateRelationsOptimisticEffect.ts`**: Removed the `{ strict: true }` third argument from two `isDeeplyEqual` calls (no longer needed as `fast-deep-equal` is always strict).
3. **`useInitializeQueryParamState.ts`**: Replaced direct `deep-equal` import with `fast-deep-equal`.
Sonarly Claude Code
ba3e881dde