ux: drop page header, move Finrod wordmark into the drawer

The h1 + tagline at the top of the main view were just taking
vertical space. Strip them. The "Finrod" wordmark now lives only
inside the side drawer, set in Cinzel (classical-inscription
serif, loaded from Google Fonts) alongside the Star of Fëanor
mark — matches the favicon and the loremaster vibe.

Body padding-top adjusted to 3.5 rem so the controls clear the
fixed hamburger button at the top-left.

CHANGELOG.md

@@ -20,6 +20,7 @@ Versioning: [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 - FAB stack rides above the on-screen keyboard on mobile via `interactive-widget=resizes-content` in the viewport meta tag (handled by Chrome on Android).
 - Layout: From / To dropdowns now occupy 2 columns at the top (was 3 columns including Model).
 - Model selector moved into a slide-out side drawer (hamburger menu in the top-left). Drawer opens from the left with a backdrop, closes via the X button, backdrop click, or `Esc`. Honours Android safe-area insets.
+- Page header (`h1 finrod` + tagline) removed from the main view to recover vertical space. The "Finrod" wordmark now lives only inside the side drawer, set in Cinzel (classical-inscription serif, loaded from Google Fonts) alongside the Star of Fëanor mark.
 - Default source language is now Dutch (was Auto-detect). Target stays English.
 - Crop modal:
   - No default crop box. User drags on the image to draw the region; falls back to full image if they confirm without drawing.