fix(web): include harness platforms in browse filter

[kkkhs]

Pull Request

Summary

• Closes fix: browse's platform filter omits entry.harness, diverging from every other harness/platform check in the codebase #5753 by matching the browse platform filter against entry.platforms or entry.harness.
• Adds a regression case for a harness-only Windsurf entry.

Submission Source

For direct content PRs:

• This PR changes exactly one content/<category>/<slug>.mdx file.
• The entry includes source/provenance URLs and practical install/use details.
• submittedBy and submittedByUrl match the PR author.
• I did not modify README.md, generated registry outputs, downloads, workflows, packages, scripts, or multiple content entries.
• I did not request HeyClaude-hosted /downloads/... package hosting for community-submitted ZIP/MCPB artifacts.
• This PR links the issue it resolves, or the no-issue rationale is written in Notes.

For platform/code/docs PRs:

• This is not a direct content submission.
• Changed routes/components/endpoints/tools are listed below.
• Screenshots or No visual impact are included when relevant.
• This PR links the issue it resolves, or the no-issue maintainer-lane rationale is written in Notes.

For registry API endpoint PRs:

• Route handler and central API contract changed together.
• Origin-check and rate-limit posture is stated below.
• OpenAPI/source generator impact is stated below; generated artifacts are not hand-edited unless maintainer/internal generation work is explicit.
• API contract tests were added or updated.
• Generator reproducibility was checked or the reason it was not checked is listed.

Schema and Quality Checks

• Content PR: pnpm validate:content:strict passed, or I am relying on CI.
• Platform/code PR: focused validation is listed below.
• Package artifact PR: pnpm validate:packages and pnpm scan:packages passed.
• No forbidden fields were added (viewCount, copyCount, popularityScore)
• Install/use/copy paths are practical and complete.
• Skill submissions include capability metadata when applicable (skillType, skillLevel, verificationStatus, verifiedAt, retrievalSources, testedPlatforms).

Quality Evidence

• Changed routes/components/endpoints/tools: /browse platform filtering through matchesSearchFilters in apps/web/src/data/search.ts.
• Expected behavior: ?platform= now includes entries whose compatibility is declared through entry.harness, matching the harness coverage surfaces.
• Important edge cases or invariants: ordinary entry.platforms matches still pass; entries with no selected platform in either field still fail.
• Backward compatibility notes: no schema or route changes.
• Screenshots for frontend/page/UI changes:
  • Desktop:
  • Mobile:
• If screenshots do not apply, write No visual impact and explain why: No visual impact — this only changes filter inclusion logic.
• Accessibility notes for UI changes: none — no UI rendering changes.
• Focused tests or reason tests are not practical: tests/search-lib-branch-coverage.test.ts covers a harness-only Windsurf entry matching a Windsurf platform filter.

Validation

• Direct content PR: I did not run generation or commit generated output.
• Platform/code PR: pnpm build passed, or the reason it was not run is listed below.
• I ran the focused checks listed above.
• I spot-checked the affected detail page(s), route(s), or integration surface(s), if applicable.

Notes

• Linked issue or no-issue rationale: Closes fix: browse's platform filter omits entry.harness, diverging from every other harness/platform check in the codebase #5753.
• Count check: a harness-only Windsurf regression fixture returns 0 results before this change and 1 after. The current generated catalog has no live harness-only rows, so the generated windsurf count remains 181 before and after.
• Validation run locally: pnpm exec vitest run tests/search-lib-branch-coverage.test.ts, pnpm build, git diff --check.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.41%. Comparing base (8e8b85c) to head (91214fc).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5807   +/-   ##
=======================================
  Coverage   96.41%   96.41%           
=======================================
  Files         534      534           
  Lines       16433    16435    +2     
  Branches     3765     3767    +2     
=======================================
+ Hits        15844    15846    +2     
  Misses        198      198           
  Partials      391      391           

Files with missing lines	Coverage Δ
apps/web/src/data/search.ts	80.52% <100.00%> (+0.20%)	⬆️

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