Address PR #39 footer review comments in Landing page

[Copilot]

This PR implements all requested changes from the linked review thread on src/pages/Landing.tsx. It resolves two footer issues: ineffective i18n fallback logic and conflicting hover transform behavior between Tailwind and Framer Motion.

• i18n fallback handling

  • Replaced t("footer.crafted_by") || "CRAFTED BY" with t(..., { defaultValue }) so fallback text is controlled by i18n as requested.

• Footer link hover transform ownership

  • Removed Tailwind hover:scale-105 from the motion.a class list.
  • Moved scale into Framer Motion so both hover transforms are applied consistently from whileHover.

• Regression coverage

  • Added src/pages/Landing.footer-review.test.ts to lock both review fixes (defaultValue usage and Framer-only hover scaling path).

<p>{t("footer.crafted_by", { defaultValue: "CRAFTED BY" })}</p>

<motion.a
  className="... transition-transform duration-300 ..."
  whileHover={{ y: -2, scale: 1.05 }}
/>