The PL24 vehicle page rendered a Card titled `t("catalog.models")` ("Modeller")
whose content was the *selected vehicle's* specs (motor/kasa/vites/pazar). When
all four spec fields were null — common for sparse decodes — the user saw an
empty card with a bogus "Modeller" heading just below the model name.
Replace the misleading card with a flat spec-chip row (icon + label : value),
hidden entirely when no specs exist. Use the shared CatalogHeader so brand →
vehicle has a proper breadcrumb back to "/catalog/$brandName" and uses the same
back-button affordance as the rest of the catalog surface. Use the shared
ViewModeToggle so view-mode buttons stop having hardcoded TR title attrs
("Izgara", "Agac", "Sutun") and inherit the i18n + a11y from the component.
Same cleanup for pcat/$catalogId_/$modelId and emex/$catalogCode_/$vehicleId:
both rolled their own header — both now use CatalogHeader with full crumbs and
i18n'd search/count/empty-state strings (catalog.pcat.*, catalog.emex.*).
Why now: catalog flow audit caught the empty-card bug ("model seçilince
yukarıda boş bir alan kalıyor"), plus drift between drill levels (some pages
used CatalogHeader, vehicle/pcat/emex did not). One unified pattern across
brands → models → vehicle → categories.
i18n: +catalog.categoryCount, +catalog.vehicleSpecs.{engine,body,transmission,
market}, +catalog.pcat.{searchPlaceholder,vehicleCount,schemaCount},
+catalog.emex.{searchPlaceholder,optionCount,variantCount,noResults,
noPartsTitle,noPartsHint,loadError}.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>