test(home): add tool search matching helper

[Shadorux]

Summary

• add a pure tool-search matching helper for name, description, category, and explicit aliases
• preserve category filtering, input ordering, and registry immutability
• add focused Vitest coverage for matching and filtering behavior

Scope

• HomePage.tsx and the search UI are intentionally not changed.

Verification

• npm.cmd test -- src/lib/toolSearch.test.ts
• npm.cmd test
• npm.cmd run build

Closes #92

[McanKul]

Thanks for the focused contribution! The helper keeps the matching rules pure and deterministic, and the test coverage is clear. I ran the full suite (31 files, 272 tests) and the production build successfully. We really appreciate you helping improve OffPDF — feel free to pick up another issue if you would like to contribute further.

[McanKul]

Reviewed against issue #92. The helper is pure, preserves ordering and immutability, and covers names, descriptions, categories, aliases, normalization, and empty/no-result cases. Full test suite and build pass.

[McanKul]

Re-reviewed after the branch update onto development. The helper remains pure and focused, and the full test suite (31 files, 272 tests) plus production build pass.