ENG-9556: Remove url for breadcrumbs with no associated doc page

[carlosabadia]

No description provided.

[linear-code]

ENG-9556

[greptile-apps]

Greptile Summary

This PR prevents 404-linked breadcrumbs for doc categories (e.g. /ai, /hosting) that have no page of their own. _resolve_breadcrumb_href now returns None for unresolvable paths, and the breadcrumb builder renders those segments as plain <span> elements instead of broken links.

• _resolve_breadcrumb_href return type changed to str | None; returns None when neither the bare path nor its overview child is registered.
• breadcrumb splits styling into a shared base_class and adds hover styles only to actual links; a hardcoded "Ai" → "AI" label fix is included for the /ai segment.
• Two new tests cover the non-clickable span behavior and the None-return case; lock-file updates bump vite to 8.0.14 and remove react-dropzone.

Confidence Score: 4/5

Safe to merge — the change narrows breadcrumb link rendering to only registered routes and falls back to plain text, which is strictly safer than the previous behaviour of linking to potentially non-existent pages.

The logic change is small and well-tested. The only open question is the single-entry label override for "AI"; other acronym segments would silently display incorrectly if added later, but nothing is broken today.

docs/app/reflex_docs/templates/docpage/docpage.py — the hardcoded label override

Important Files Changed

Filename	Overview
docs/app/reflex_docs/templates/docpage/docpage.py	Core change: _resolve_breadcrumb_href now returns None for unregistered paths; breadcrumb renders those as non-clickable spans. Adds a hardcoded "Ai"→"AI" label fix.
docs/app/tests/test_breadcrumbs.py	Two new tests verify the None-return and non-clickable span behaviors; good coverage of the new logic.
docs/app/reflex.lock/package.json	Removes react-dropzone dependency and bumps vite from 8.0.12 to 8.0.14.
docs/app/reflex.lock/bun.lock	Lock file updated to reflect package.json changes: removes react-dropzone and associated packages, upgrades vite and rolldown.

_{Reviews (1): Last reviewed commit: "ENG-9556: Remove url for breadcrumbs wit..." | Re-trigger Greptile}

[codspeed-hq]

Merging this PR will not alter performance

✅ 24 untouched benchmarks

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_{Comparing carlos/breadcrumbs-fix (cc01ebb) with main (e88acf7)¹}

Footnotes

1. No successful run was found on main (7281317) during the generation of this report, so e88acf7 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩