Lay the Almanacka design foundation: tokens, type, shell

New token system in global.css (near-white surfaces, one ink-blue
accent, no sub-12px type), self-hosted Schibsted Grotesk, rewritten
primitives (buttons, fields, modal shell, segmented, disclosure,
skeleton), a borderless 56px header with an SV | EN language toggle,
an Icon component replacing glyphs, page skeletons that keep the
layout during loading, and leave-type colours moved out of TS into
CSS variables. Feature blocks keep their structure for later phases.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

frontend/nginx.conf.template

@@ -61,6 +61,14 @@ server {
         try_files  $uri =404;
     }
 
+    # Self-hosted webfonts are versioned in their filename (…-v7.woff2), so
+    # a glyph update ships as a new file and the old one can be cached forever.
+    location /fonts/ {
+        access_log off;
+        add_header Cache-Control "public, max-age=31536000, immutable" always;
+        try_files  $uri =404;
+    }
+
     # index.html is the only mutable entry point — never cache it, or a deploy
     # leaves clients pinned to a stale asset graph.
     location = /index.html {