feat: plakat redesign phase 2 (desk with throwable objects, mobile card deck)

- New "Tisch" section replaces the old projects block on the home page
- Objects: project cards from Directus (flip on tap, link to detail page),
  thesis ticket with countdown, server card, currently-reading book from
  Hardcover (with skeleton), polaroid photo, sticker
- Desktop: Framer Motion drag with momentum, elastic table edges, tilt that
  follows throw velocity, bring-to-front, "Tidy up" and "Mess it up"
- Mobile: card deck, swipe the top card away (distance or velocity),
  prev/next buttons, live counter, tap to flip
- Both layouts are server rendered and switched by CSS, so content is
  visible without JavaScript and nothing jumps on hydration
- Taps after a drag no longer flip cards
- New named colors polaroid/bookcover instead of raw hex classes
- Texts in de/en, i18n key check extended

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

messages/en.json

@@ -33,6 +33,42 @@
       "ctaWork": "See projects",
       "ctaContact": "Write me"
     },
+    "tisch": {
+      "title": "The desk.",
+      "allProjects": "All projects",
+      "hintBoard": "Everything here can be touched. Throw it, stack it, flip the cards.",
+      "hintDeck": "Swipe the cards aside, tap to flip.",
+      "tidy": "Tidy up",
+      "mess": "Mess it up",
+      "flip": "tap to flip",
+      "details": "Open project",
+      "prev": "Previous card",
+      "next": "Next card",
+      "ticketTitle": "Master's thesis · due 15 Feb 2027",
+      "ticketDays": "days until submission",
+      "ticketJob": "from 02/2027: M365 administrator",
+      "ticketStub": "Now",
+      "serverTitle": "What I run",
+      "servers": {
+        "ingress": {
+          "name": "netcup · front door",
+          "detail": "Traefik, Dokploy, this site"
+        },
+        "mail": {
+          "name": "IONOS · mail and photos",
+          "detail": "mailcow, Immich"
+        },
+        "home": {
+          "name": "Home · Raspberry Pi",
+          "detail": "Home Assistant, Paperless"
+        }
+      },
+      "serverNote": "Guarded by CrowdSec, daily backups with restic.",
+      "bookLabel": "Reading now",
+      "bookFallback": "To the library",
+      "photoCaption": "That's me.",
+      "sticker": "Runs on my own servers."
+    },
     "about": {
       "title": "Behind the Code",
       "p1": "Ever since I set up my first home server, I've been hooked on infrastructure. Currently studying in Osnabrück, I split my time between developing modern web apps with Next.js and building mobile experiences with Flutter.",