feat: plakat redesign phase 1 (tokens, fonts, poster hero, header)

- New design tokens: signal red, ink and paper as RGB channels; ink and paper
  swap roles in dark mode so every component inverts cleanly
- Fonts via next/font: Bricolage Grotesque (with wdth/opsz axes), Geist,
  Geist Mono; drop Inter and Playfair
- Poster hero: kicker, giant DK0 wordmark that reacts to pointer distance
  (weight and width through a damped spring, desktop only, off for reduced
  motion), claim as h1, intro with thesis countdown, marquee strip
- Header in poster style: transparent over the red hero, paper strip with
  ink rule when scrolled or on subpages; drawer menu restyled
- Remove wavy SVG separators, CSS shader gradient, background blobs and
  unused providers that caused the pink/purple bands between sections
- Drop the global p/span/div color override so colors inherit properly
- New hero texts in de/en, tests and i18n key check updated

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

messages/en.json

@@ -23,21 +23,15 @@
     "acceptSelected": "Accept selected",
     "rejectAll": "Reject all",
     "hide": "Hide"
-  }
-  ,
+  },
   "home": {
     "hero": {
-      "badge": "Student & Self-Hoster",
-      "line1": "Building",
-      "line2": "Stuff.",
-      "features": {
-        "f1": "Next.js & Flutter",
-        "f2": "Docker Swarm & CI/CD",
-        "f3": "Self-Hosted Infrastructure"
-      },
-      "description": "I'm Dennis Konkol, a computer science student and web developer from Osnabrück, Germany. I build fullstack apps with Next.js and Flutter and love running my own infrastructure with Docker and CI/CD.",
-      "ctaWork": "View Projects",
-      "ctaContact": "Get in touch"
+      "kicker": "Dennis Konkol — Osnabrück, Germany",
+      "claim": "I self-host half my life. The rest I code.",
+      "intro": "IT admin in Osnabrück and master's student. From February 2027 I look after Microsoft 365 full-time, until then my master's thesis.",
+      "countdown": "{days, plural, one {# day to go.} other {# days to go.}}",
+      "ctaWork": "See projects",
+      "ctaContact": "Write me"
     },
     "about": {
       "title": "Behind the Code",
@@ -133,8 +127,7 @@
         "characters": "{count} characters"
       }
     }
-  }
-  ,
+  },
   "projects": {
     "shared": {
       "featured": "Featured"
@@ -154,8 +147,7 @@
       "viewSource": "View Source",
       "techStack": "Tech Stack"
     }
-  }
-  ,
+  },
   "footer": {
     "role": "Software Engineer",
     "madeIn": "Made in Germany",
@@ -201,4 +193,3 @@
     "professional": "Professional"
   }
 }
-