Centralize the HomeView research profile fetch so the ticker header and research cards share one FMP profile request, preserving the B3 company-name behavior without doubling profile traffic. Wire the FMP cache regression into the backend test script and fix the stale API-contract shared import so backend tests can run through the new cache check.
Refs: docs/AUDIT_REDESIGN.md items B2, B3, and C2.
Co-Authored-By: GPT-5 Codex <noreply@openai.com>