- Centralizes and reuses query cache handling logic:
Introduces a `ParentIds` type (src/generic/types.ts) and standardizes its use across data/API hooks for updating or invalidating parent/child query caches.
- Ensures cache coherence using `cancelQueries` before updating query data:
Before calling `setQueryData` for any block, any inflight queries are cancelled to prevent race conditions and stale UI.
- Simplifies post-sync/invalidation flows:
Removes Redux thunk usages in favor of direct query invalidations using React Query APIs within course outline cards, sidebars, publish modal, and `unlinkmodal`.
- Refactors data types for clarity:
Splits XBlock into `XBlockBase` and derived interfaces so the presence of `childInfo` is explicit.
- Cleans up redundant code and props:
Removes unnecessary `memoization`, `useDispatch` imports, and duplicate logic in React components.
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