Shrink desktop header logo to 70px

Header row height (lg:h-32 -> lg:h-25) and the logo's own height
(h-[108px] -> h-[70px]) both come down together so the row doesn't
carry leftover empty space around the smaller mark. Footer logo is
unchanged (still 108px) — the two are sized independently.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

AGENTS.md

@@ -59,10 +59,12 @@ Fonts: IRANYekan (fa, local `public/fonts`) + Montserrat (latin, next/font).
   mark, not موبایل معلم) — the wiring is correct and will pick up the right
   asset automatically the moment it's replaced in the dashboard; don't
   "fix" this by hardcoding the local fallback again.
-- Header/footer logo renders at `h-[108px]` (3x the original `h-9`/36px, on
-  request). If the wrong logo above still looks small at that size, it's
-  because that specific PNG has a lot of baked-in transparent padding around
-  the mark — `object-contain` can't fix that, only the replacement asset can.
+- Header (desktop) logo renders at `h-[70px]`; footer logo stays at
+  `h-[108px]` (3x the original `h-9`/36px, on request) — the two were sized
+  independently, on request, so don't assume they should match. If the wrong
+  logo above still looks small at either size, it's because that specific
+  PNG has a lot of baked-in transparent padding around the mark —
+  `object-contain` can't fix that, only the replacement asset can.
 - Contact data (phone, mobile, branch addresses, Instagram/Telegram) in
   `src/data/site.ts` is real, pulled from the live theme's footer — `GET
   /website/business-info` still returns empty `phoneNumbers`/`addresses`/