Keep icon touch targets full-size; shrink logo instead; fluid nav gap

Revert the 40px icon-shrink below 375px (hard to tap accurately) and reclaim that space from the logo instead (76-130px depending on width, vs the always-181px controls). Re-verified overflow-free at 320px via Playwright with all 4 icons at full 44px.

Also: wishlist heart's touch-friendly smaller/subtler size now applies to already-wishlisted (filled) hearts too, not just not-yet-wishlisted ones. The wishlist page's login redirect now returns to the wishlist instead of the generic account/orders overview. Desktop nav-link gap now scales fluidly between 1024-1300px instead of a fixed 48px that felt too wide right where nav labels have the least room.

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

app/components/SearchOverlay.tsx

@@ -29,7 +29,7 @@ export function SearchButton() {
         type="button"
         onClick={() => setOpen(true)}
         aria-label="Suche öffnen"
-        className="flex h-11 w-11 max-[375px]:h-10 max-[375px]:w-10 items-center justify-center shrink-0 active:scale-[0.9] transition-transform"
+        className="flex h-11 w-11 items-center justify-center shrink-0 active:scale-[0.9] transition-transform"
       >
         <svg viewBox="0 0 24 24" className="h-6 w-6 text-text-primary" fill="none" aria-hidden="true">
           <circle cx="11" cy="11" r="7" stroke="currentColor" strokeWidth="1.8" />