fix(lit-query): brand infiniteQueryOptions queryKey with DataTag

[vedantchalke36]

Fix [lit-query] infiniteQueryOptions missing DataTag on queryKey (#11142).

Problem

infiniteQueryOptions was the only *QueryOptions helper not branding its queryKey with DataTag. As a result, queryClient.setQueryData(infiniteQuerySlugType, ...) / getQueryData could not infer the InfiniteData type from a tagged key — the updater's old data fell back to unknown, and caching through a shared options object lost its type safety.

queryOptions already brands the key (with type tests), and react-query, vue-query and solid-query all brand it in their infiniteQueryOptions — lit-query was the outlier.

Changes

• packages/lit-query/src/infiniteQueryOptions.ts: return type now intersects { queryKey: DataTag<TQueryKey, InfiniteData<TQueryFnData>, TError> } — same shape as react-query/vue-query.
• packages/lit-query/src/tests/type-inference.test.ts: regression tests mirroring the existing queryOptions checks — queryKey[dataTagSymbol] is InfiniteData<{ page: number }>, and getQueryData/setQueryData infer the tagged data (the exact scenario from the issue).
• .changeset/quiet-mice-invent.md: patch for @tanstack/lit-query.

Test

The lit-query test:lib suite (type-inference tests run under vitest + tsc) is exercised by CI on this PR; could not run locally without installing the monorepo.

Closes #11142

Summary by CodeRabbit

• Bug Fixes

  • Improved type inference for infinite query options.
  • getQueryData and setQueryData now correctly infer infinite query data types from associated query keys.

• Tests

  • Added coverage for inferred infinite-query data, cached data, and update results.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 04544ae9-0829-4b90-923b-14081bbf6061

📥 Commits

Reviewing files that changed from the base of the PR and between 46d7f02 and 4eeb47d.

📒 Files selected for processing (3)

• .changeset/quiet-mice-invent.md
• packages/lit-query/src/infiniteQueryOptions.ts
• packages/lit-query/src/tests/type-inference.test.ts

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📝 Walkthrough

Walkthrough

The PR brands infiniteQueryOptions query keys with DataTag and InfiniteData. Type-inference tests verify getQueryData and setQueryData receive the inferred infinite-query types. A patch changeset documents the update.

Changes

lit-query infinite query key branding

Layer / File(s)	Summary
Infinite query key type contract packages/lit-query/src/infiniteQueryOptions.ts	infiniteQueryOptions now returns a queryKey branded with DataTag, InfiniteData<TQueryFnData>, and TError.
Inference validation and release metadata packages/lit-query/src/tests/type-inference.test.ts, .changeset/quiet-mice-invent.md	Type tests verify InfiniteData inference through getQueryData and setQueryData. The changeset records a patch release.

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Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• TanStack/query#11146: Makes the same infiniteQueryOptions DataTag change and adds related lit-query type tests.
• TanStack/query#11164: Changes TypeScript inference for infinite queries in a different package and through NoInfer.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change to brand lit-query infiniteQueryOptions query keys with DataTag.
Description check	✅ Passed	The description explains the problem, implementation, tests, release impact, and linked issue, although it does not use every template heading.
Linked Issues check	✅ Passed	The implementation and regression tests address issue #11142 by adding DataTag branding and restoring InfiniteData inference for getQueryData and setQueryData.
Out of Scope Changes check	✅ Passed	The changeset, implementation update, and type-inference tests are directly related to the linked issue and stated pull request objectives.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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