feat: plakat redesign phase 4 (chat window, contact, footer, cleanup) (#77)

- AI chat moves into a window/sheet, opened from a new speech-bubble card on
  the desk; it now respects the chatbot consent and asks before sending
  anything to n8n (previously it ignored the consent)
- Contact as red poster section with big mail address and the form on a paper
  card; validation errors are finally shown inline (aria-invalid, role=alert)
- Footer as ink strip with dk0 wordmark, legal links and a button to reopen
  the privacy settings
- "About me" in the header opens the about window on the home page
- Remove the old About section and its parts (BentoChat, ActivityFeed,
  CurrentlyReading, ReadBooks), the unused ChatWidget, Projects and BentoGrid,
  their tests, wrappers, loaders, types and texts
- scripts/directus-cleanup-redesign.mjs: dry run by default, --apply archives
  hobbies, tech stack categories and old content pages and deletes four
  unused message overrides after a full JSON backup; run only after the
  redesign is live on production

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

lib/translations-loader.ts

@@ -2,8 +2,6 @@ import { getLocalizedMessage } from '@/lib/i18n-loader';
 import type {
   NavTranslations,
   FooterTranslations,
-  AboutTranslations,
-  ProjectsTranslations,
   ContactTranslations,
   ConsentTranslations,
 } from '@/types/translations';
@@ -54,68 +52,6 @@ export async function getFooterTranslations(locale: string): Promise<FooterTrans
   };
 }
 
-export async function getAboutTranslations(locale: string): Promise<AboutTranslations> {
-  const keys = [
-    'home.about.title',
-    'home.about.p1',
-    'home.about.p2',
-    'home.about.p3',
-    'home.about.funFactTitle',
-    'home.about.funFactBody',
-    'home.about.techStackTitle',
-    'home.about.techStack.categories.frontendMobile',
-    'home.about.techStack.categories.backendDevops',
-    'home.about.techStack.categories.toolsAutomation',
-    'home.about.techStack.categories.securityAdmin',
-    'home.about.techStack.items.selfHostedServices',
-    'home.about.hobbiesTitle',
-    'home.about.hobbies.selfHosting',
-    'home.about.hobbies.gaming',
-    'home.about.hobbies.gameServers',
-    'home.about.hobbies.jogging',
-  ];
-
-  const values = await Promise.all(keys.map(key => getLocalizedMessage(key, locale)));
-
-  return {
-    title: values[0],
-    p1: values[1],
-    p2: values[2],
-    p3: values[3],
-    funFactTitle: values[4],
-    funFactBody: values[5],
-    techStackTitle: values[6],
-    techStack: {
-      categories: {
-        frontendMobile: values[7],
-        backendDevops: values[8],
-        toolsAutomation: values[9],
-        securityAdmin: values[10],
-      },
-      items: {
-        selfHostedServices: values[11],
-      },
-    },
-    hobbiesTitle: values[12],
-    hobbies: {
-      selfHosting: values[13],
-      gaming: values[14],
-      gameServers: values[15],
-      jogging: values[16],
-    },
-  };
-}
-
-export async function getProjectsTranslations(locale: string): Promise<ProjectsTranslations> {
-  const [title, subtitle, viewAll] = await Promise.all([
-    getLocalizedMessage('home.projects.title', locale),
-    getLocalizedMessage('home.projects.subtitle', locale),
-    getLocalizedMessage('home.projects.viewAll', locale),
-  ]);
-
-  return { title, subtitle, viewAll };
-}
-
 export async function getContactTranslations(locale: string): Promise<ContactTranslations> {
   const keys = [
     'home.contact.title',