fix(formulation): remove breadcrumbs from Build, Compare, and Map pages

[BigSimmo]

Summary

• Removed the Formulation > … breadcrumb (FormulationBreadcrumbs) from the Formulation Build, Compare, and Map pages
• Deleted the now-unused FormulationBreadcrumbs helper and its InformationPageBreadcrumbs import from formulation-ui.tsx, since no other page consumed it

Verification

• npm run test:focused -- --files src/components/formulation/formulation-builder-page.tsx,src/components/formulation/formulation-compare-page.tsx,src/components/formulation/formulation-map-page.tsx,src/components/formulation/formulation-ui.tsx — 2 files, 39 tests passed
• npx tsc --noEmit — clean
• npx eslint on the four changed files — clean
• npm run verify:pr-local — Verification not run: localized JSX/import removal in three client components with no routing, data, or styling-contract change; the focused test + typecheck + lint above are the smallest checks covering the plausible regression (broken import/unused export, snapshot mismatch), per this repo's Tier 2 process-hardening guidance
• npm run verify:ui — UI verification not run: change removes a text breadcrumb line only; no shared search-chrome/composer/routing surface touched

Risk and rollout

• Risk: none — presentational-only removal of a secondary nav element already covered by the top-level Formulation mode tabs (Find/Build/Compare/Map) visible on each page
• Rollback: revert this PR
• Provider or production effects: None

Notes

• The Formulation "Find" page/tab was not touched — the user's request named Build, Compare, and Map only, and grep confirmed FormulationBreadcrumbs was never used on Find.

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📥 Commits

Reviewing files that changed from the base of the PR and between dc7e518 and 9c96030.

📒 Files selected for processing (4)

• src/components/formulation/formulation-builder-page.tsx
• src/components/formulation/formulation-compare-page.tsx
• src/components/formulation/formulation-map-page.tsx
• src/components/formulation/formulation-ui.tsx

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