API's market-snapshot returns priceChangePct with keys d1/d7/d30 but the
FE interface and KpiStrip accessor used day1/day7/day30, causing a
TypeError crash on the home page for authenticated users. Rename the
FE type, update KpiStrip accessors, and fix the landing test fixture.
Fixes TEC-3091.
Co-Authored-By: Paperclip <noreply@paperclip.ing>