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 (048dad3) with main (82f90c8)}