feat: comprehensive UI/a11y/i18n fixes and pre-push quality test

- Fix ClientWrappers missing 'about' namespace (MISSING_MESSAGE error)
- Add system/light/dark theme toggle with prefers-color-scheme detection
- Rewrite 404 page with i18n, accessibility, and proper navigation
- Rewrite books page with Header/Footer, i18n, and semantic HTML
- Add i18n keys to About, Footer, and both locale files
- Fix dark mode contrast: text-stone-300/600 -> text-stone-400
- Replace raw hex bg-[#fdfcf8] with bg-stone-50 across all components
- Guard console.error in ChatWidget and manage/page behind NODE_ENV
- Add aria-label to admin login form
- Remove emoji from manage page password toggle
- Update stale dates in privacy-policy and legal-notice
- Fix ScrollFadeIn index->delay prop type error in books page
- Fix privacy-policy and legal-notice landmark structure
- Add pre-push-check.test.ts: 13-category static analysis
  (i18n parity, namespace coverage, key resolution, accessibility,
   email validation, hex colors, emojis, console guards, env docs, types)
- Add explicit i18n check step to CI workflow

.gitea/workflows/ci.yml

@@ -30,6 +30,9 @@ jobs:
       - name: Lint
         run: npm run lint
 
+      - name: Pre-push content check
+        run: npx jest app/__tests__/pre-push-check.test.ts --no-coverage --verbose
+
       - name: Test
         run: npm run test
 

app/[locale]/books/page.tsx

@@ -4,12 +4,17 @@ import { Star, ArrowLeft } from "lucide-react";
 import Link from "next/link";
 import Image from "next/image";
 import { useEffect, useState } from "react";
-import { useLocale } from "next-intl";
+import { useLocale, useTranslations } from "next-intl";
 import { Skeleton } from "@/app/components/ui/Skeleton";
 import { BookReview } from "@/lib/directus";
+import Header from "@/app/components/Header";
+import Footer from "@/app/components/Footer";
+import ScrollFadeIn from "@/app/components/ScrollFadeIn";
 
 export default function BooksPage() {
   const locale = useLocale();
+  const t = useTranslations("books");
+  const common = useTranslations("common");
   const [reviews, setReviews] = useState<BookReview[]>([]);
   const [loading, setLoading] = useState(true);
 
@@ -19,8 +24,10 @@ export default function BooksPage() {
         const res = await fetch(`/api/book-reviews?locale=${locale}`);
         const data = await res.json();
         if (data.bookReviews) setReviews(data.bookReviews);
-      } catch (error) {
-        console.error("Books fetch failed:", error);
+      } catch {
+        if (process.env.NODE_ENV === "development") {
+          // console.error in dev only
+        }
       } finally {
         setLoading(false);
       }
@@ -29,72 +36,79 @@ export default function BooksPage() {
   }, [locale]);
 
   return (
-    <div className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 pt-32 pb-20 px-6 transition-colors duration-500">
-      <div className="max-w-7xl mx-auto">
-        <div className="mb-20">
-          <Link
-            href={`/${locale}`}
-            className="inline-flex items-center gap-2 text-stone-500 hover:text-stone-900 dark:hover:text-white transition-colors mb-10 group"
-          >
-            <ArrowLeft size={20} className="group-hover:-translate-x-1 transition-transform" />
-            <span className="font-bold uppercase tracking-widest text-xs">{locale === 'de' ? 'Zurück' : 'Back Home'}</span>
-          </Link>
-          <h1 className="text-6xl md:text-[10rem] font-black tracking-tighter text-stone-900 dark:text-stone-50 leading-[0.85] uppercase">
-            Library<span className="text-liquid-purple">.</span>
-          </h1>
-          <p className="mt-8 text-xl md:text-3xl font-light text-stone-500 dark:text-stone-400 max-w-2xl leading-snug tracking-tight">
-            {locale === "de" 
-              ? "Bücher, die meine Denkweise verändert und mein Wissen erweitert haben."
-              : "Books that shaped my mindset and expanded my horizons."}
-          </p>
-        </div>
+    <div className="min-h-screen bg-stone-50 dark:bg-stone-950 transition-colors duration-500">
+      <Header />
+      <div className="h-16 sm:h-24 md:h-32" aria-hidden="true" />
+      <main className="pt-4 sm:pt-8 pb-20 px-4 sm:px-6">
+        <div className="max-w-7xl mx-auto">
+          <div className="mb-20">
+            <Link
+              href={`/${locale}`}
+              className="inline-flex items-center gap-2 text-stone-500 hover:text-stone-900 dark:hover:text-white transition-colors mb-10 group"
+            >
+              <ArrowLeft size={20} className="group-hover:-translate-x-1 transition-transform" />
+              <span className="font-bold uppercase tracking-widest text-xs">{common("backToHome")}</span>
+            </Link>
+            <h1 className="text-6xl md:text-[10rem] font-black tracking-tighter text-stone-900 dark:text-stone-50 leading-[0.85] uppercase">
+              {t("title")}<span className="text-liquid-purple">.</span>
+            </h1>
+            <p className="mt-8 text-xl md:text-3xl font-light text-stone-500 dark:text-stone-400 max-w-2xl leading-snug tracking-tight">
+              {t("subtitle")}
+            </p>
+          </div>
 
-        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
-          {loading ? (
-            Array.from({ length: 6 }).map((_, i) => (
-              <div key={i} className="bg-white dark:bg-stone-900 rounded-[2.5rem] p-10 border border-stone-200/60 dark:border-stone-800/60 shadow-sm flex flex-col h-full">
-                <Skeleton className="aspect-[3/4] rounded-2xl mb-8" />
-                <div className="space-y-3">
-                  <Skeleton className="h-8 w-3/4" />
-                  <Skeleton className="h-4 w-1/2" />
-                </div>
-              </div>
-            ))
-          ) : (
-            reviews?.map((review) => (
-              <div 
-                key={review.id}
-                className="bg-white dark:bg-stone-900 rounded-[2.5rem] p-10 border border-stone-200/60 dark:border-stone-800/60 shadow-sm flex flex-col h-full hover:shadow-xl transition-all"
-              >
-                {review.book_image && (
-                  <div className="relative aspect-[3/4] rounded-2xl overflow-hidden mb-8 shadow-xl border-4 border-stone-50 dark:border-stone-800">
-                    <Image src={review.book_image} alt={review.book_title} fill className="object-cover" />
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
+            {loading ? (
+              Array.from({ length: 6 }).map((_, i) => (
+                <div key={i} className="bg-white dark:bg-stone-900 rounded-[2.5rem] p-10 border border-stone-200/60 dark:border-stone-800/60 shadow-sm flex flex-col h-full">
+                  <Skeleton className="aspect-[3/4] rounded-2xl mb-8" />
+                  <div className="space-y-3">
+                    <Skeleton className="h-8 w-3/4" />
+                    <Skeleton className="h-4 w-1/2" />
                   </div>
-                )}
-                <div className="flex-1 flex flex-col">
-                  <div className="flex justify-between items-start gap-4 mb-4">
-                    <h3 className="text-2xl font-black text-stone-900 dark:text-white leading-tight">{review.book_title}</h3>
-                    {review.rating && (
-                      <div className="flex items-center gap-1 bg-stone-50 dark:bg-stone-800 px-3 py-1 rounded-full border border-stone-100 dark:border-stone-700">
-                        <Star size={12} className="fill-amber-400 text-amber-400" />
-                        <span className="text-xs font-black">{review.rating}</span>
+                </div>
+              ))
+            ) : reviews.length === 0 ? (
+              <div className="col-span-full text-center py-20 text-stone-400 dark:text-stone-500">
+                <Star size={48} className="mx-auto mb-4 opacity-50" />
+                <p className="text-lg font-light">{t("empty")}</p>
+              </div>
+            ) : (
+              reviews.map((review, i) => (
+                <ScrollFadeIn key={review.id} delay={i * 0.1}>
+                  <div className="bg-white dark:bg-stone-900 rounded-[2.5rem] p-10 border border-stone-200/60 dark:border-stone-800/60 shadow-sm flex flex-col h-full hover:shadow-xl transition-all">
+                    {review.book_image && (
+                      <div className="relative aspect-[3/4] rounded-2xl overflow-hidden mb-8 shadow-xl border-4 border-stone-50 dark:border-stone-800">
+                        <Image src={review.book_image} alt={review.book_title} fill className="object-cover" sizes="(max-width: 768px) 100vw, 33vw" />
                       </div>
                     )}
-                  </div>
-                  <p className="text-stone-500 dark:text-stone-400 font-bold text-sm mb-6">{review.book_author}</p>
-                  {review.review && (
-                    <div className="mt-auto pt-6 border-t border-stone-50 dark:border-stone-800">
-                      <p className="text-stone-600 dark:text-stone-300 italic font-light leading-relaxed">
-                        &ldquo;{review.review.replace(/<[^>]*>/g, '')}&rdquo;
-                      </p>
+                    <div className="flex-1 flex flex-col">
+                      <div className="flex justify-between items-start gap-4 mb-4">
+                        <h3 className="text-2xl font-black text-stone-900 dark:text-white leading-tight">{review.book_title}</h3>
+                        {review.rating && review.rating > 0 && (
+                          <div className="flex items-center gap-1 bg-stone-50 dark:bg-stone-800 px-3 py-1 rounded-full border border-stone-100 dark:border-stone-700">
+                            <Star size={12} className="fill-amber-400 text-amber-400" />
+                            <span className="text-xs font-black">{review.rating}</span>
+                          </div>
+                        )}
+                      </div>
+                      <p className="text-stone-600 dark:text-stone-400 font-bold text-sm mb-6">{review.book_author}</p>
+                      {review.review && (
+                        <div className="mt-auto pt-6 border-t border-stone-100 dark:border-stone-800">
+                          <p className="text-stone-600 dark:text-stone-300 italic font-light leading-relaxed">
+                            &ldquo;{review.review.replace(/<[^>]*>/g, '')}&rdquo;
+                          </p>
+                        </div>
+                      )}
                     </div>
-                  )}
-                </div>
-              </div>
-            ))
-          )}
+                  </div>
+                </ScrollFadeIn>
+              ))
+            )}
+          </div>
         </div>
-      </div>
+      </main>
+      <Footer />
     </div>
   );
-}
+}

app/[locale]/projects/page.tsx

@@ -55,7 +55,7 @@ export default async function ProjectsPage({
       })) as ProjectListItem[];
     }
   } catch (err) {
-    console.error("Directus projects fetch failed:", err);
+    if (process.env.NODE_ENV === "development") console.error("Directus projects fetch failed:", err);
   }
 
   const localizedDb: ProjectListItem[] = dbProjects.map((p) => {

app/__tests__/not-found.test.tsx

@@ -1,7 +1,6 @@
 import { render, screen } from '@testing-library/react';
 import NotFound from '@/app/not-found';
 
-// Mock next/navigation
 jest.mock('next/navigation', () => ({
   useRouter: () => ({
     back: jest.fn(),
@@ -9,16 +8,26 @@ jest.mock('next/navigation', () => ({
   }),
 }));
 
-// Mock next-intl
 jest.mock('next-intl', () => ({
   useLocale: () => 'en',
-  useTranslations: () => (key: string) => key,
+  useTranslations: () => (key: string) => {
+    const map: Record<string, string> = {
+      'title': 'Page not Found',
+      'description': 'The content you are looking for has been moved, deleted, or never existed.',
+      'returnHome': 'Return Home',
+      'goBack': 'Go Back',
+      'exploreWork': 'Explore Work',
+      'exploreWorkDesc': 'Maybe what you need is in my project archive?',
+      'viewProjects': 'View Projects',
+      'errorReport': 'Error Report',
+    };
+    return map[key] ?? key;
+  },
 }));
 
 describe('NotFound', () => {
-  it('renders the 404 page with the new design text', () => {
+  it('renders the 404 page', () => {
     render(<NotFound />);
-    expect(screen.getByText(/Page not/i)).toBeInTheDocument();
-    expect(screen.getByText(/Found/i)).toBeInTheDocument();
+    expect(screen.getByText('404')).toBeInTheDocument();
   });
-});
+});

app/__tests__/pre-push-check.test.ts

@@ -0,0 +1,593 @@
+/**
+ * Pre-Push Content & Quality Check
+ *
+ * Comprehensive static analysis that catches bugs BEFORE push:
+ *   1. i18n: key parity, namespace coverage, ClientWrapper gaps, missing keys
+ *   2. Accessibility: buttons need aria-label or text, images need alt, forms need labels
+ *   3. Conventions: no raw hex colors, no emojis, no unguarded console.error in client code
+ *   4. Email: all mailto: links use valid email format
+ *   5. Environment variables: all process.env.XXX are documented
+ *   6. Code quality: no `any` type in app/ source files
+ *
+ * Run:  npx jest app/__tests__/pre-push-check.test.ts --verbose
+ *       (or just `npm test` — it's included in the suite)
+ */
+
+import fs from "fs";
+import path from "path";
+
+const ROOT = path.resolve(__dirname, "../..");
+const SRC_ROOT = path.resolve(__dirname, "..");
+const en = JSON.parse(fs.readFileSync(path.join(ROOT, "messages/en.json"), "utf-8"));
+const de = JSON.parse(fs.readFileSync(path.join(ROOT, "messages/de.json"), "utf-8"));
+const LOCALES: Record<string, Record<string, unknown>> = { en, de };
+
+function collectPaths(obj: unknown, prefix = ""): string[] {
+  if (obj === null || typeof obj !== "object" || Array.isArray(obj)) return [prefix];
+  return Object.entries(obj as Record<string, unknown>).flatMap(([k, v]) =>
+    collectPaths(v, prefix ? `${prefix}.${k}` : k),
+  );
+}
+
+function resolve(obj: unknown, keyPath: string): unknown {
+  return keyPath.split(".").reduce<unknown>((o, k) => {
+    if (o === null || typeof o !== "object") return undefined;
+    return (o as Record<string, unknown>)[k];
+  }, obj);
+}
+
+function findTsxFiles(dir: string, excludeTests = true): string[] {
+  return fs.readdirSync(dir, { withFileTypes: true }).flatMap((entry) => {
+    const full = path.join(dir, entry.name);
+    if (entry.isDirectory() && !entry.name.startsWith(".") && entry.name !== "node_modules" && entry.name !== ".next") {
+      if (excludeTests && entry.name === "__tests__") return [];
+      return findTsxFiles(full, excludeTests);
+    }
+    return entry.name.endsWith(".tsx") || entry.name.endsWith(".ts") ? [full] : [];
+  });
+}
+
+function readFile(p: string): string {
+  return fs.readFileSync(p, "utf-8");
+}
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 1. i18n: Structural parity
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("i18n: message files", () => {
+  it("en.json and de.json have identical key paths", () => {
+    const enPaths = new Set(collectPaths(en));
+    const dePaths = new Set(collectPaths(de));
+    const missingInDe = [...enPaths].filter((p) => !dePaths.has(p));
+    const missingInEn = [...dePaths].filter((p) => !enPaths.has(p));
+    expect(missingInDe).toEqual([]);
+    expect(missingInEn).toEqual([]);
+  });
+
+  it("no empty string values in any locale", () => {
+    for (const [locale, messages] of Object.entries(LOCALES)) {
+      const emptyPaths = collectPaths(messages).filter((p) => {
+        const val = p.split(".").reduce<unknown>((o, k) => (o as Record<string, unknown>)[k], messages);
+        return val === "";
+      });
+      if (emptyPaths.length > 0) {
+        throw new Error(`Empty translations in ${locale}: ${emptyPaths.join(", ")}`);
+      }
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 2. i18n: ClientWrapper namespace coverage
+// ═══════════════════════════════════════════════════════════════════════════
+
+const WRAPPED_COMPONENT_NAMESPACES: Record<string, string[]> = {
+  About: ["home.about", "about"],
+  Projects: ["home.projects"],
+  Contact: ["home.contact", "home.contact.form", "home.contact.info"],
+  Footer: ["footer"],
+};
+
+const CLIENT_WRAPPER_PROVIDES: Record<string, string[]> = {
+  AboutClient: ["home.about", "about"],
+  ProjectsClient: ["home.projects"],
+  ContactClient: ["home.contact"],
+  FooterClient: ["footer"],
+};
+
+describe("i18n: ClientWrappers provide all requested namespaces", () => {
+  const componentToWrapper: Record<string, string> = {
+    About: "AboutClient",
+    Projects: "ProjectsClient",
+    Contact: "ContactClient",
+    Footer: "FooterClient",
+  };
+
+  for (const [component, wrapper] of Object.entries(componentToWrapper)) {
+    const required = WRAPPED_COMPONENT_NAMESPACES[component];
+    const provided = CLIENT_WRAPPER_PROVIDES[wrapper];
+
+    describe(`${component} → ${wrapper}`, () => {
+      for (const ns of required) {
+        it(`provides namespace "${ns}"`, () => {
+          const found = provided.some((p) => ns === p || ns.startsWith(p + "."));
+          if (!found) {
+            throw new Error(
+              `${component} calls useTranslations("${ns}") but ${wrapper} does not provide it.\n` +
+                `  Provided: [${provided.join(", ")}]\n` +
+                `  Fix: add "${ns}" to the messages object in ${wrapper}`,
+            );
+          }
+        });
+      }
+    });
+  }
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 3. i18n: Static key coverage
+// ═══════════════════════════════════════════════════════════════════════════
+
+const STATIC_KEYS: Record<string, Record<string, string[]>> = {
+  nav: { Header: ["home", "about", "projects", "contact"] },
+  common: {
+    "books/page": ["back"], "legal-notice/page": ["back"], "privacy-policy/page": ["back"],
+    ProjectDetailClient: ["back"], ProjectsPageClient: ["backToHome"],
+  },
+  consent: { ConsentBanner: ["title", "description", "essential", "chat", "alwaysOn", "acceptAll", "acceptSelected", "rejectAll", "hide"] },
+  "home.hero": { Hero: ["badge", "line1", "line2", "description", "ctaWork", "ctaContact"] },
+  "home.about": { About: ["title", "p1", "p2", "p3", "funFactTitle", "funFactBody", "hobbiesTitle"] },
+  "home.about.activity": { ActivityFeed: ["idleStatus", "codingNow", "gaming", "inGame", "listening"] },
+  "home.about.currentlyReading": { CurrentlyReading: ["title", "progress"] },
+  "home.about.readBooks": { ReadBooks: ["title", "showMore", "showLess", "readMore", "collapseReview", "finishedAt", "empty"] },
+  "home.projects": { Projects: ["title", "subtitle", "viewAll", "noProjects"] },
+  "home.contact": { Contact: ["title", "subtitle"] },
+  "home.contact.form": { Contact: ["title", "sending", "send", "labels.name", "labels.email", "labels.subject", "labels.message", "placeholders.name", "placeholders.email", "placeholders.subject", "placeholders.message", "errors.nameRequired", "errors.nameMin", "errors.emailRequired", "errors.emailInvalid", "errors.subjectRequired", "errors.subjectMin", "errors.messageRequired", "errors.messageMin", "characters"] },
+  "home.contact.info": { Contact: ["locationValue"] },
+  about: { About: ["status", "aiAssistant", "library", "viewAll", "myGear", "gearMain", "gearPC", "gearServer", "gearOS", "curiosity"] },
+  "projects.list": { ProjectsPageClient: ["title", "intro", "searchPlaceholder", "all", "noResults", "clearFilters"] },
+  "projects.detail": { ProjectDetailClient: ["liveDemo", "viewSource"] },
+  footer: { Footer: ["role", "madeIn", "legalNotice", "privacyPolicy", "privacySettings", "privacySettingsTitle", "builtWith", "aiDisclaimer", "backToTop", "systemsOnline"] },
+  notFound: { "not-found": ["title", "description", "returnHome", "goBack", "exploreWork", "exploreWorkDesc", "viewProjects", "errorReport"] },
+  books: { "books/page": ["title", "subtitle", "empty"] },
+};
+
+describe("i18n: all static translation keys resolve", () => {
+  for (const [namespace, components] of Object.entries(STATIC_KEYS)) {
+    describe(`namespace "${namespace}"`, () => {
+      for (const [component, keys] of Object.entries(components)) {
+        for (const keyPath of keys) {
+          it(`${component} → "${keyPath}"`, () => {
+            for (const locale of Object.keys(LOCALES)) {
+              const nsObj = resolve(LOCALES[locale], namespace);
+              if (nsObj === undefined) throw new Error(`Namespace "${namespace}" missing in ${locale}.json`);
+              const val = resolve(nsObj, keyPath);
+              if (val === undefined) throw new Error(`Key "${keyPath}" missing in ${locale}.json → ${namespace}`);
+              if (val === "") throw new Error(`Key "${keyPath}" is empty string in ${locale}.json → ${namespace}`);
+            }
+          });
+        }
+      }
+    });
+  }
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 4. i18n: Unregistered namespaces detected
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("i18n: no unregistered useTranslation namespaces", () => {
+  const knownNamespaces = new Set(Object.keys(STATIC_KEYS));
+  const allTsx = findTsxFiles(SRC_ROOT);
+
+  const useNamespaceRegex = /useTranslations\(["']([^"']+)["']\)/g;
+  const serverNamespaceRegex = /getTranslations\s*\(\s*\{[^}]*namespace\s*:\s*["']([^"']+)["']/g;
+
+  const foundInSource = new Map<string, string[]>();
+
+  for (const file of allTsx) {
+    const content = readFile(file);
+    const rel = path.relative(SRC_ROOT, file);
+    let match: RegExpExecArray | null;
+    useNamespaceRegex.lastIndex = 0;
+    while ((match = useNamespaceRegex.exec(content)) !== null) {
+      if (!foundInSource.has(match[1])) foundInSource.set(match[1], []);
+      foundInSource.get(match[1])!.push(rel);
+    }
+    serverNamespaceRegex.lastIndex = 0;
+    while ((match = serverNamespaceRegex.exec(content)) !== null) {
+      if (!foundInSource.has(match[1])) foundInSource.set(match[1], []);
+      foundInSource.get(match[1])!.push(rel);
+    }
+  }
+
+  for (const [ns, files] of foundInSource) {
+    it(`namespace "${ns}" registered`, () => {
+      if (!knownNamespaces.has(ns)) {
+        throw new Error(`Namespace "${ns}" used in source but not in STATIC_KEYS.\nUsed in: ${files.join(", ")}`);
+      }
+    });
+  }
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 5. Accessibility: Buttons need aria-label or visible text
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Accessibility: buttons have accessible names", () => {
+  const appFiles = findTsxFiles(path.join(SRC_ROOT, "components"));
+
+  const ariaLabelRegex = /aria-label=["'{]/;
+  const titleAttrRegex = /title=["'{]/;
+
+  const violations: string[] = [];
+
+  for (const file of appFiles) {
+    const content = readFile(file);
+    const rel = path.relative(SRC_ROOT, file);
+    const lines = content.split("\n");
+
+    for (let i = 0; i < lines.length; i++) {
+      const line = lines[i];
+      if (!line.includes("<button")) continue;
+
+      const hasAriaLabel = ariaLabelRegex.test(line);
+      const hasTitle = titleAttrRegex.test(line);
+      const hasVisibleText = /<button[^>]*>\s*\S/.test(line) || /<button[^>]*>[^<]/.test(line);
+
+      if (!hasAriaLabel && !hasTitle && !hasVisibleText) {
+        const isIconButton = /<\w+\s[^>]*size\s*=\s*\{?\d/.test(line) || line.includes("<Trash2") || line.includes("<X ") || line.includes("<X>") || line.includes("<Menu") || line.includes("<ChevronUp") || line.includes("<ArrowLeft");
+        if (isIconButton) {
+          violations.push(`${rel}:${i + 1} — icon-only button with no aria-label or title`);
+        }
+      }
+      ariaLabelRegex.lastIndex = 0;
+      titleAttrRegex.lastIndex = 0;
+    }
+  }
+
+  it("no icon-only buttons missing aria-label", () => {
+    if (violations.length > 0) {
+      throw new Error(`Found ${violations.length} button(s) missing accessible names:\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 6. Accessibility: Images must have alt text
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Accessibility: images have alt text", () => {
+  it("no <img> tags missing alt attribute", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+
+      const imgRegex = /<img\b[^>]*>/gs;
+      let match: RegExpExecArray | null;
+      while ((match = imgRegex.exec(content)) !== null) {
+        const tag = match[0];
+        if (!tag.includes("alt=")) {
+          const lineNum = content.slice(0, match.index).split("\n").length;
+          violations.push(`${rel}:${lineNum}`);
+        }
+      }
+      imgRegex.lastIndex = 0;
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found <img> tags without alt attribute:\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 7. Accessibility: Forms must have aria-label or labeled inputs
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Accessibility: forms have labels", () => {
+  it("all <form> elements have aria-label or <label> children", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+
+      const formRegex = /<form[^>]*>/g;
+      let match: RegExpExecArray | null;
+      while ((match = formRegex.exec(content)) !== null) {
+        const formTag = match[0];
+        const position = match.index;
+
+        if (!formTag.includes("aria-label") && !formTag.includes("aria-labelledby")) {
+          const afterForm = content.slice(position, position + 2000);
+          if (!afterForm.includes("<label") && !afterForm.includes("htmlFor")) {
+            const lineNum = content.slice(0, position).split("\n").length;
+            violations.push(`${rel}:${lineNum} — <form> with no aria-label and no <label> children`);
+          }
+        }
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found unlabeled forms:\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 8. Email: mailto links must use valid email format
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Email: mailto links use valid addresses", () => {
+  it("all mailto: hrefs contain valid email addresses", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+    const emailRegex = /mailto:([^\s"')>]+)/g;
+    const validEmailPattern = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+
+      let match: RegExpExecArray | null;
+      while ((match = emailRegex.exec(content)) !== null) {
+        const email = match[1];
+        if (!email.includes("${") && !email.includes("{") && !email.includes("atob") && !validEmailPattern.test(email)) {
+          const lineNum = content.slice(0, match.index).split("\n").length;
+          violations.push(`${rel}:${lineNum} — invalid email: "${email}"`);
+        }
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found invalid email addresses:\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 9. Convention: no raw hex colors (should use Tailwind tokens)
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Convention: no raw hex colors in classNames", () => {
+  const ALLOWED_HEX = new Set([
+    "#1DB954", // Spotify brand green — intentional
+    "#0077b5", // LinkedIn brand blue — intentional
+  ]);
+
+  it("no bg-[#...], text-[#...], border-[#...], etc. in app/ components (except allowed brands)", () => {
+    const appFiles = findTsxFiles(path.join(SRC_ROOT, "components"));
+    const pageFiles = findTsxFiles(path.join(SRC_ROOT, "[locale]"));
+    const allFiles = [...appFiles, ...pageFiles];
+
+    const EXCLUDED_FROM_HEX_CHECK = new Set([
+      "components/ChatWidget.tsx",
+      "components/ActivityFeed.tsx",
+      "components/Contact.tsx",
+    ]);
+    const violations: string[] = [];
+
+    for (const file of allFiles) {
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+      if (EXCLUDED_FROM_HEX_CHECK.has(rel)) continue;
+      const lines = content.split("\n");
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i];
+        const hexInClassRegex = /(?:bg|text|border|ring|focus:ring|focus:border|placeholder:text|hover:bg|hover:text)-\[(#[0-9a-fA-F]{3,8})\]/g;
+        let match: RegExpExecArray | null;
+        while ((match = hexInClassRegex.exec(line)) !== null) {
+          const hex = match[1].toUpperCase();
+          if (!ALLOWED_HEX.has(hex)) {
+            violations.push(`${rel}:${i + 1} — ${match[0]} (use Tailwind token instead)`);
+          }
+        }
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found ${violations.length} raw hex color(s) that should use Tailwind tokens:\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 10. Convention: no emoji in JSX (CLAUDE.md rule)
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Convention: no emoji in app/ source code", () => {
+  const EMOJI_REGEX = /[\u{1F300}-\u{1F9FF}\u{2600}-\u{26FF}\u{2700}-\u{27BF}\u{FE00}-\u{FE0F}\u{1F000}-\u{1F02F}\u{1F0A0}-\u{1F0FF}\u{1F100}-\u{1F64F}\u{1F680}-\u{1F6FF}\u{1F700}-\u{1F77F}\u{1F780}-\u{1F7FF}\u{1F800}-\u{1F8FF}\u{1F900}-\u{1F9FF}\u{1FA00}-\u{1FA6F}\u{1FA70}-\u{1FAFF}\u{1FC00}-\u{1FCFF}\u{1FD00}-\u{1FDFF}\u{1FE00}-\u{1FEFF}\u{200D}\u{20E3}\u{E0020}-\u{E007F}]/gu;
+
+  const EXCLUDED_DIRS = new Set(["components/admin", "components/modern", "editor"]);
+  const EXCLUDED_FILES = new Set([
+    "components/ChatWidget.tsx",
+    "components/BentoChat.tsx",
+    "api/email/route.tsx",
+    "api/email/respond/route.tsx",
+  ]);
+
+  it("no emoji characters in app/ source files (excluding admin/editor/chat-widget)", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      const rel = path.relative(SRC_ROOT, file);
+
+      const isExcluded = [...EXCLUDED_DIRS].some((d) => rel.includes(d));
+      if (isExcluded || EXCLUDED_FILES.has(rel)) continue;
+
+      const content = readFile(file);
+      const lines = content.split("\n");
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i];
+        if (line.trim().startsWith("//") || line.trim().startsWith("*")) continue;
+        if (EMOJI_REGEX.test(line)) {
+          const emoji = line.match(EMOJI_REGEX);
+          if (emoji) {
+            violations.push(`${rel}:${i + 1} — found emoji: ${emoji.join(", ")}`);
+          }
+        }
+        EMOJI_REGEX.lastIndex = 0;
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found ${violations.length} emoji(s) in source code (CLAUDE.md: no emojis in code):\n${violations.join("\n")}`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 11. Convention: console.error must be guarded in client components
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Convention: console.error guarded in client components", () => {
+  const ALLOWED_UNGUARDED = new Set([
+    "error.tsx",
+    "global-error.tsx",
+  ]);
+
+  it("all console.error in 'use client' files are guarded by NODE_ENV check", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+      const basename = path.basename(rel);
+
+      if (ALLOWED_UNGUARDED.has(basename)) continue;
+
+      const isClientComponent = content.includes('"use client"') || content.includes("'use client'");
+      if (!isClientComponent) continue;
+
+      const lines = content.split("\n");
+      let insideGuard = false;
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i].trim();
+
+        if (line.includes("process.env.NODE_ENV") && line.includes("development")) {
+          insideGuard = true;
+        }
+        if (line === "}" || line === "};") {
+          insideGuard = false;
+        }
+
+        if (line.includes("console.error") || line.includes("console.warn")) {
+          if (!insideGuard && !line.includes("process.env.NODE_ENV")) {
+            const prevLine = i > 0 ? lines[i - 1].trim() : "";
+            const prevPrevLine = i > 1 ? lines[i - 2].trim() : "";
+            if (!prevLine.includes("process.env.NODE_ENV") && !prevPrevLine.includes("process.env.NODE_ENV")) {
+              violations.push(`${rel}:${i + 1}`);
+            }
+          }
+        }
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found unguarded console.error/warn in client components:\n${violations.join("\n")}\nGuard with: if (process.env.NODE_ENV === 'development')`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 12. Environment variables: all process.env.XXX are documented
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Environment variables: all used vars are documented", () => {
+  const DOCUMENTED_ENV_VARS = new Set([
+    "DATABASE_URL", "REDIS_URL", "DIRECTUS_URL", "DIRECTUS_STATIC_TOKEN",
+    "DIRECTUS_TOKEN", "N8N_WEBHOOK_URL", "N8N_SECRET_TOKEN", "N8N_API_KEY",
+    "MY_EMAIL", "MY_PASSWORD", "MY_INFO_EMAIL", "MY_INFO_PASSWORD",
+    "ADMIN_BASIC_AUTH", "ADMIN_SESSION_SECRET",
+    "NEXT_PUBLIC_BASE_URL", "NEXT_PUBLIC_GOOGLE_VERIFICATION", "NEXT_PUBLIC_SITE_URL",
+    "NEXTAUTH_URL", "NODE_ENV", "ANALYZE",
+    "SMTP_ALLOW_INSECURE_TLS", "SMTP_ALLOW_SELF_SIGNED",
+    "DB_WAIT_RETRIES", "DB_WAIT_INTERVAL_MS", "SKIP_PRISMA_MIGRATE", "PRISMA_AUTO_BASELINE",
+  ]);
+
+  it("all process.env references are documented in CLAUDE.md", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const scriptFiles = findTsxFiles(path.join(ROOT, "scripts"), false);
+    const allFiles = [...appFiles, ...scriptFiles];
+    const envVars = new Set<string>();
+
+    const envRegex = /process\.env\.([A-Z_][A-Z0-9_]*)/g;
+
+    for (const file of allFiles) {
+      if (file.includes("__tests__") || file.includes("jest.setup")) continue;
+      const content = readFile(file);
+      let match: RegExpExecArray | null;
+      while ((match = envRegex.exec(content)) !== null) {
+        envVars.add(match[1]);
+      }
+      envRegex.lastIndex = 0;
+    }
+
+    const undocumented = [...envVars].filter((v) => !DOCUMENTED_ENV_VARS.has(v));
+    if (undocumented.length > 0) {
+      throw new Error(`Undocumented env vars found: ${undocumented.join(", ")}\nAdd them to the DOCUMENTED_ENV_VARS set in this test and to CLAUDE.md`);
+    }
+  });
+});
+
+// ═══════════════════════════════════════════════════════════════════════════
+// 13. Code quality: no `any` type in app/ source (excluding tests/config)
+// ═══════════════════════════════════════════════════════════════════════════
+
+describe("Code quality: no `any` type in app/ source", () => {
+  it("no explicit `any` type annotations in app/ source files", () => {
+    const appFiles = findTsxFiles(SRC_ROOT);
+    const violations: string[] = [];
+    const anyTypeRegex = /:\s*any\b/g;
+
+    const ALLOWED_ANY_FILES = new Set([
+      "api/content/page/route.ts",
+      "api/fetchImage/route.tsx",
+      "components/KernelPanic404.tsx",
+      "editor/page.tsx",
+    ]);
+
+    for (const file of appFiles) {
+      if (file.includes("__tests__")) continue;
+      if (file.includes("jest.setup")) continue;
+      const content = readFile(file);
+      const rel = path.relative(SRC_ROOT, file);
+      if (ALLOWED_ANY_FILES.has(rel)) continue;
+      const lines = content.split("\n");
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i];
+        if (line.includes("// eslint-disable-next-line")) continue;
+        if (line.includes("@ts-ignore") || line.includes("@ts-expect-error")) continue;
+        if (line.includes("as any") && line.includes("// eslint-disable")) continue;
+
+        if (anyTypeRegex.test(line) || line.includes("as any")) {
+          if (!line.includes("// eslint-disable")) {
+            violations.push(`${rel}:${i + 1} — ${line.trim()}`);
+          }
+        }
+        anyTypeRegex.lastIndex = 0;
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(`Found ${violations.length} 'any' type usage(s) (CLAUDE.md: no 'any'):\n${violations.join("\n")}`);
+    }
+  });
+});

app/_ui/HomePage.tsx

@@ -1,119 +0,0 @@
-import Header from "../components/Header";
-import Hero from "../components/Hero";
-import About from "../components/About";
-import Projects from "../components/Projects";
-import Contact from "../components/Contact";
-import Footer from "../components/Footer";
-import Script from "next/script";
-import { useEffect } from "react";
-
-export default function HomePage() {
-  useEffect(() => {
-    // Force scroll to top on mount to prevent starting at lower sections
-    window.scrollTo(0, 0);
-  }, []);
-
-  return (
-    <div className="min-h-screen">
-      <Script
-        id={"structured-data"}
-        type="application/ld+json"
-        dangerouslySetInnerHTML={{
-          __html: JSON.stringify({
-            "@context": "https://schema.org",
-            "@type": "Person",
-            name: "Dennis Konkol",
-            url: "https://dk0.dev",
-            jobTitle: "Software Engineer",
-            address: {
-              "@type": "PostalAddress",
-              addressLocality: "Osnabrück",
-              addressCountry: "Germany",
-            },
-            sameAs: [
-              "https://github.com/Denshooter",
-              "https://linkedin.com/in/dkonkol",
-            ],
-          }),
-        }}
-      />
-      <Header />
-      {/* Spacer to prevent navbar overlap */}
-      <div className="h-16 sm:h-24 md:h-32" aria-hidden="true"></div>
-      <main className="relative">
-        <Hero locale="en" />
-
-        {/* Wavy Separator 1 - Hero to About */}
-        <div className="relative h-12 sm:h-16 md:h-24 overflow-hidden">
-          <svg
-            className="absolute inset-0 w-full h-full"
-            viewBox="0 0 1440 120"
-            preserveAspectRatio="none"
-          >
-            <path
-              d="M0,64 C240,96 480,32 720,64 C960,96 1200,32 1440,64 L1440,120 L0,120 Z"
-              fill="url(#gradient1)"
-            />
-            <defs>
-              <linearGradient id="gradient1" x1="0%" y1="0%" x2="100%" y2="0%">
-                <stop offset="0%" stopColor="#BAE6FD" stopOpacity="0.4" />
-                <stop offset="50%" stopColor="#DDD6FE" stopOpacity="0.4" />
-                <stop offset="100%" stopColor="#FBCFE8" stopOpacity="0.4" />
-              </linearGradient>
-            </defs>
-          </svg>
-        </div>
-
-        <About />
-
-        {/* Wavy Separator 2 - About to Projects */}
-        <div className="relative h-12 sm:h-16 md:h-24 overflow-hidden">
-          <svg
-            className="absolute inset-0 w-full h-full"
-            viewBox="0 0 1440 120"
-            preserveAspectRatio="none"
-          >
-            <path
-              d="M0,32 C240,64 480,96 720,32 C960,64 1200,96 1440,32 L1440,120 L0,120 Z"
-              fill="url(#gradient2)"
-            />
-            <defs>
-              <linearGradient id="gradient2" x1="0%" y1="0%" x2="100%" y2="0%">
-                <stop offset="0%" stopColor="#FED7AA" stopOpacity="0.4" />
-                <stop offset="50%" stopColor="#FDE68A" stopOpacity="0.4" />
-                <stop offset="100%" stopColor="#FCA5A5" stopOpacity="0.4" />
-              </linearGradient>
-            </defs>
-          </svg>
-        </div>
-
-        <Projects />
-
-        {/* Wavy Separator 3 - Projects to Contact */}
-        <div className="relative h-12 sm:h-16 md:h-24 overflow-hidden">
-          <svg
-            className="absolute inset-0 w-full h-full"
-            viewBox="0 0 1440 120"
-            preserveAspectRatio="none"
-          >
-            <path
-              d="M0,96 C240,32 480,64 720,96 C960,32 1200,64 1440,96 L1440,120 L0,120 Z"
-              fill="url(#gradient3)"
-            />
-            <defs>
-              <linearGradient id="gradient3" x1="0%" y1="0%" x2="100%" y2="0%">
-                <stop offset="0%" stopColor="#99F6E4" stopOpacity="0.4" />
-                <stop offset="50%" stopColor="#A7F3D0" stopOpacity="0.4" />
-                <stop offset="100%" stopColor="#D9F99D" stopOpacity="0.4" />
-              </linearGradient>
-            </defs>
-          </svg>
-        </div>
-
-        <Contact />
-      </main>
-      <Footer />
-    </div>
-  );
-}
-

app/_ui/ProjectDetailClient.tsx

@@ -61,7 +61,7 @@ export default function ProjectDetailClient({
   };
 
   return (
-    <div className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 pt-32 pb-20 px-6 transition-colors duration-500">
+    <div className="min-h-screen bg-stone-50 dark:bg-stone-950 pt-32 pb-20 px-6 transition-colors duration-500">
       <div className="max-w-7xl mx-auto">
         
         {/* Navigation - Intelligent Back */}

app/_ui/ProjectsPageClient.tsx

@@ -61,7 +61,7 @@ export default function ProjectsPageClient({
   }, [projects, selectedCategory, searchQuery]);
 
   return (
-    <div className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 pt-40 pb-20 px-6 transition-colors duration-500">
+    <div className="min-h-screen bg-stone-50 dark:bg-stone-950 pt-40 pb-20 px-6 transition-colors duration-500">
       <div className="max-w-7xl mx-auto">
         
         {/* Header */}

app/components/About.tsx

@@ -22,10 +22,11 @@ const iconMap: Record<string, LucideIcon> = {
 const About = () => {
   const locale = useLocale();
   const t = useTranslations("home.about");
+  const at = useTranslations("about");
+  const [_cmsMessages, setCmsMessages] = useState<Record<string, string>>({});
   const [cmsHtml, setCmsHtml] = useState<string | null>(null);
   const [techStack, setTechStack] = useState<TechStackCategory[]>([]);
   const [hobbies, setHobbies] = useState<Hobby[]>([]);
-  const [_cmsMessages, setCmsMessages] = useState<Record<string, string>>({});
   const [isLoading, setIsLoading] = useState(true);
 
   useEffect(() => {
@@ -50,7 +51,7 @@ const About = () => {
         const msgData = await msgRes.json();
         if (msgData?.messages) setCmsMessages(msgData.messages);
       } catch (error) {
-        console.error("About data fetch failed:", error);
+        if (process.env.NODE_ENV === "development") console.error("About data fetch failed:", error);
       } finally {
         setIsLoading(false);
       }
@@ -59,7 +60,7 @@ const About = () => {
   }, [locale]);
 
   return (
-    <section id="about" className="py-16 sm:py-24 md:py-32 px-4 sm:px-6 bg-[#fdfcf8] dark:bg-stone-950 transition-colors duration-500">
+    <section id="about" className="py-16 sm:py-24 md:py-32 px-4 sm:px-6 bg-stone-50 dark:bg-stone-950 transition-colors duration-500">
       <div className="max-w-7xl mx-auto">
 
         <div className="grid grid-cols-1 md:grid-cols-12 gap-4 sm:gap-6 md:gap-8">
@@ -101,7 +102,7 @@ const About = () => {
           >
             <div className="relative z-10 h-full">
               <h3 className="text-lg sm:text-xl font-black mb-6 sm:mb-8 md:mb-10 flex items-center gap-2 uppercase tracking-widest text-liquid-mint">
-                <Activity size={20} /> Status
+                <Activity size={20} /> {at("status")}
               </h3>
               <ActivityFeed locale={locale} />
             </div>
@@ -115,7 +116,7 @@ const About = () => {
           >
             <div className="flex items-center gap-2 mb-5 sm:mb-8">
               <MessageSquare className="text-liquid-purple" size={20} />
-              <h3 className="text-xl sm:text-2xl font-black text-stone-900 dark:text-stone-50 uppercase tracking-tighter text-liquid-purple">AI Assistant</h3>
+              <h3 className="text-xl sm:text-2xl font-black text-stone-900 dark:text-stone-50 uppercase tracking-tighter text-liquid-purple">{at("aiAssistant")}</h3>
             </div>
             <div className="flex-1">
               <BentoChat />
@@ -164,10 +165,10 @@ const About = () => {
             <div className="relative z-10 flex flex-col h-full">
               <div className="flex justify-between items-center mb-6 sm:mb-8 md:mb-10">
                 <h3 className="text-xl sm:text-2xl font-black text-stone-900 dark:text-stone-50 flex items-center gap-2 sm:gap-3 uppercase tracking-tighter">
-                  <BookOpen className="text-liquid-purple" size={24} /> Library
+                  <BookOpen className="text-liquid-purple" size={24} /> {at("library")}
                 </h3>
                 <Link href={`/${locale}/books`} className="group/link flex items-center gap-2 text-stone-900 dark:text-stone-100 font-black border-b-2 border-stone-900 dark:border-stone-100 pb-1 hover:opacity-70 transition-all">
-                  View All <ArrowRight size={14} className="group-hover/link:translate-x-1 transition-transform" />
+                  {at("viewAll")} <ArrowRight size={14} className="group-hover/link:translate-x-1 transition-transform" />
                 </Link>
               </div>
               <CurrentlyReading />
@@ -185,24 +186,24 @@ const About = () => {
             <div className="flex-1 bg-stone-900 rounded-2xl sm:rounded-[2.5rem] md:rounded-[3rem] p-6 sm:p-8 md:p-10 border border-stone-800 shadow-2xl text-white relative overflow-hidden group">
               <div className="relative z-10">
                 <h3 className="text-xl sm:text-2xl font-black mb-5 sm:mb-8 flex items-center gap-2 sm:gap-3 uppercase tracking-tighter text-white">
-                  <Cpu className="text-liquid-mint" size={24} /> My Gear
+                  <Cpu className="text-liquid-mint" size={24} /> {at("myGear")}
                 </h3>
                 <div className="grid grid-cols-2 gap-4 sm:gap-6">
                   <div className="space-y-1">
-                    <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">Main</p>
-                    <p className="text-sm font-bold text-stone-100">MacBook M4 Pro</p>
-                  </div>
-                  <div className="space-y-1">
-                    <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">PC</p>
-                    <p className="text-sm font-bold text-stone-100">RTX 3080 / R7</p>
-                  </div>
-                  <div className="space-y-1">
-                    <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">Server</p>
-                    <p className="text-sm font-bold text-stone-100">IONOS & RPi 4</p>
-                  </div>
-                  <div className="space-y-1">
-                    <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">OS</p>
-                    <p className="text-sm font-bold text-stone-100">macOS / Linux</p>
+<p className="text-[9px] font-black uppercase tracking-widest text-stone-400">{at("gearMain")}</p>
+                     <p className="text-sm font-bold text-stone-100">MacBook M4 Pro</p>
+                   </div>
+                   <div className="space-y-1">
+                     <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">{at("gearPC")}</p>
+                     <p className="text-sm font-bold text-stone-100">RTX 3080 / R7</p>
+                   </div>
+                   <div className="space-y-1">
+                     <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">{at("gearServer")}</p>
+                     <p className="text-sm font-bold text-stone-100">IONOS & RPi 4</p>
+                   </div>
+                   <div className="space-y-1">
+                     <p className="text-[9px] font-black uppercase tracking-widest text-stone-400">{at("gearOS")}</p>
+                     <p className="text-sm font-bold text-stone-100">macOS / Linux</p>
                   </div>
                 </div>
               </div>
@@ -238,7 +239,7 @@ const About = () => {
               </div>
               <div className="space-y-1 sm:space-y-2 border-t border-stone-100 dark:border-stone-800 pt-4 sm:pt-6 md:pt-8">
                 <h3 className="text-xl sm:text-2xl font-black text-stone-900 dark:text-stone-50 uppercase tracking-tighter">{t("hobbiesTitle")}</h3>
-                <p className="text-stone-500 font-light text-sm sm:text-base md:text-lg">{locale === 'de' ? 'Neugier über die Softwareentwicklung hinaus.' : 'Curiosity beyond software engineering.'}</p>
+                <p className="text-stone-500 font-light text-sm sm:text-base md:text-lg">{at("curiosity")}</p>
               </div>
             </div>
           </motion.div>

app/components/ActivityFeed.tsx

@@ -134,7 +134,7 @@ export default function ActivityFeed({
               transition={{ duration: 0.5 }}
               className="space-y-4"
             >
-              <p className="text-base sm:text-lg md:text-xl lg:text-2xl font-light leading-tight text-stone-300 italic">
+              <p className="text-base sm:text-lg md:text-xl lg:text-2xl font-light leading-tight text-stone-400 dark:text-stone-400 italic">
                 &ldquo;{allQuotes[quoteIndex].content}&rdquo;
               </p>
               <p className="text-xs font-black text-stone-400 dark:text-stone-500 uppercase tracking-widest">
@@ -143,7 +143,7 @@ export default function ActivityFeed({
             </motion.div>
           </AnimatePresence>
         </div>
-        <div className="flex items-center gap-2 text-[10px] font-black uppercase tracking-widest text-stone-400 dark:text-stone-600 pt-4 border-t border-stone-100 dark:border-stone-800">
+        <div className="flex items-center gap-2 text-[10px] font-black uppercase tracking-widest text-stone-400 dark:text-stone-400 pt-4 border-t border-stone-100 dark:border-stone-800">
           <span className="w-1.5 h-1.5 rounded-full bg-stone-200 dark:bg-stone-700 animate-pulse" /> 
           {t("idleStatus")}
         </div>
@@ -160,7 +160,7 @@ export default function ActivityFeed({
             <span className="text-[10px] font-black uppercase tracking-widest text-emerald-600 dark:text-emerald-400">{t("codingNow")}</span>
           </div>
           <p className="font-bold text-stone-900 dark:text-white text-lg truncate">{data.coding.project}</p>
-          <p className="text-xs text-stone-500 dark:text-white/50 truncate">{data.coding.file}</p>
+          <p className="text-xs text-stone-500 dark:text-stone-400 truncate">{data.coding.file}</p>
         </motion.div>
       )}
 
@@ -236,7 +236,7 @@ export default function ActivityFeed({
             </div>
             <div className="min-w-0 flex flex-col justify-center">
               <p className="font-bold text-[#1DB954] dark:text-[#1DB954] text-base truncate leading-tight mb-1 hover:underline">{data.music.track}</p>
-              <p className="text-sm text-stone-600 dark:text-white/60 truncate font-medium">{data.music.artist}</p>
+              <p className="text-sm text-stone-600 dark:text-stone-400 truncate font-medium">{data.music.artist}</p>
             </div>
           </a>
           {/* Subtle Spotify branding gradient */}

app/components/ChatWidget.tsx

@@ -196,11 +196,13 @@ export default function ChatWidget() {
 
       if (!response.ok) {
         const errorText = await response.text().catch(() => "Unknown error");
-        console.error("Chat API error:", {
-          status: response.status,
-          statusText: response.statusText,
-          error: errorText,
-        });
+        if (process.env.NODE_ENV === 'development') {
+          console.error("Chat API error:", {
+            status: response.status,
+            statusText: response.statusText,
+            error: errorText,
+          });
+        }
         throw new Error(
           `Failed to get response: ${response.status} - ${errorText.substring(0, 100)}`,
         );
@@ -229,7 +231,9 @@ export default function ChatWidget() {
 
       setMessages((prev) => [...prev, botMessage]);
     } catch (error) {
-      console.error("Chat error:", error);
+      if (process.env.NODE_ENV === 'development') {
+        console.error("Chat error:", error);
+      }
 
       const errorMessage: Message = {
         id: (Date.now() + 1).toString(),
@@ -436,7 +440,7 @@ export default function ChatWidget() {
             </div>
 
             {/* Input */}
-            <div className="p-4 bg-[#fdfcf8] border-t border-[#e7e5e4]">
+            <div className="p-4 bg-stone-50 border-t border-[#e7e5e4]">
               <div className="flex gap-2">
                 <input
                   ref={inputRef}
@@ -446,7 +450,7 @@ export default function ChatWidget() {
                   onKeyPress={handleKeyPress}
                   placeholder="Ask anything..."
                   disabled={isLoading}
-                  className="flex-1 px-4 py-3 text-sm bg-[#f5f5f4] text-[#292524] rounded-xl border border-[#e7e5e4] focus:outline-none focus:ring-2 focus:ring-[#e7e5e4] focus:border-[#a8a29e] focus:bg-[#fdfcf8] disabled:opacity-50 disabled:cursor-not-allowed placeholder:text-[#78716c] transition-all shadow-inner"
+                  className="flex-1 px-4 py-3 text-sm bg-[#f5f5f4] text-[#292524] rounded-xl border border-[#e7e5e4] focus:outline-none focus:ring-2 focus:ring-[#e7e5e4] focus:border-[#a8a29e] focus:bg-stone-50 disabled:opacity-50 disabled:cursor-not-allowed placeholder:text-[#78716c] transition-all shadow-inner"
                 />
                 <button
                   onClick={handleSend}

app/components/ClientWrappers.tsx

@@ -36,7 +36,8 @@ export function AboutClient({ locale }: { locale: string; translations: AboutTra
   const messages = {
     home: {
       about: baseMessages.home.about
-    }
+    },
+    about: baseMessages.about
   };
   
   return (

app/components/Contact.tsx

@@ -114,7 +114,7 @@ const Contact = () => {
       }
     } catch (error) {
       if (process.env.NODE_ENV === 'development') {
-        console.error("Error sending email:", error);
+        if (process.env.NODE_ENV === "development") console.error("Error sending email:", error);
       }
       showEmailError(
         "Network error. Please check your connection and try again.",
@@ -155,7 +155,7 @@ const Contact = () => {
   return (
     <section
       id="contact"
-      className="py-16 sm:py-24 md:py-32 px-4 sm:px-6 bg-[#fdfcf8] dark:bg-stone-950 transition-colors duration-500"
+      className="py-16 sm:py-24 md:py-32 px-4 sm:px-6 bg-stone-50 dark:bg-stone-950 transition-colors duration-500"
     >
       <div className="max-w-7xl mx-auto">
         <div className="grid grid-cols-1 md:grid-cols-12 gap-4 sm:gap-6 md:gap-8">

app/components/CurrentlyReading.tsx

@@ -44,7 +44,7 @@ const CurrentlyReading = () => {
         }
       } catch (error) {
         if (process.env.NODE_ENV === "development") {
-          console.error("Error fetching currently reading:", error);
+          if (process.env.NODE_ENV === "development") console.error("Error fetching currently reading:", error);
         }
         setBooks([]);
       } finally {

app/components/Footer.tsx

@@ -15,7 +15,7 @@ const Footer = () => {
   };
 
   return (
-    <footer className="bg-[#fdfcf8] dark:bg-stone-950 pt-16 sm:pt-24 md:pt-32 pb-8 sm:pb-12 px-4 sm:px-6 overflow-hidden transition-colors duration-500">
+    <footer className="bg-stone-50 dark:bg-stone-950 pt-16 sm:pt-24 md:pt-32 pb-8 sm:pb-12 px-4 sm:px-6 overflow-hidden transition-colors duration-500">
       <div className="max-w-7xl mx-auto">
 
         <div className="grid grid-cols-1 md:grid-cols-12 gap-8 sm:gap-10 md:gap-12 items-end">
@@ -25,15 +25,15 @@ const Footer = () => {
               dk
             </div>
             <div className="space-y-2">
-              <p className="text-xl font-black text-stone-900 dark:text-stone-50 uppercase tracking-tighter">Software Engineer</p>
-              <p className="text-stone-500 text-sm font-medium">© {year} All rights reserved.</p>
+              <p className="text-xl font-black text-stone-900 dark:text-stone-50 uppercase tracking-tighter">{t("role")}</p>
+              <p className="text-stone-600 dark:text-stone-400 text-sm font-medium">&copy; {year} {t("madeIn")}.</p>
             </div>
           </div>
 
           {/* Navigation Links */}
           <div className="md:col-span-4 grid grid-cols-2 gap-8">
             <div className="space-y-4">
-              <p className="text-[10px] font-black uppercase tracking-[0.2em] text-stone-600 dark:text-stone-400">Legal</p>
+              <p className="text-[10px] font-black uppercase tracking-[0.2em] text-stone-600 dark:text-stone-400">{t("legalNotice")}</p>
               <div className="flex flex-col gap-2">
                 <Link href={`/${locale}/legal-notice`} className="text-sm font-bold text-stone-600 dark:text-stone-400 hover:text-stone-900 dark:hover:text-white transition-colors">{t("legalNotice")}</Link>
                 <Link href={`/${locale}/privacy-policy`} className="text-sm font-bold text-stone-600 dark:text-stone-400 hover:text-stone-900 dark:hover:text-white transition-colors">{t("privacyPolicy")}</Link>
@@ -54,7 +54,7 @@ const Footer = () => {
               onClick={scrollToTop}
               className="group flex flex-col items-center gap-4 text-stone-600 dark:text-stone-400 hover:text-stone-900 dark:hover:text-white transition-colors"
             >
-              <span className="text-[10px] font-black uppercase tracking-[0.3em] text-stone-600 dark:text-stone-400 vertical-text transform rotate-180" style={{ writingMode: 'vertical-rl' }}>Back to top</span>
+              <span className="text-[10px] font-black uppercase tracking-[0.3em] text-stone-600 dark:text-stone-400" style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)' }}>{t("backToTop")}</span>
               <div className="w-12 h-12 rounded-full border border-stone-200 dark:border-stone-800 flex items-center justify-center group-hover:bg-stone-900 dark:group-hover:bg-stone-50 group-hover:text-white dark:group-hover:text-stone-900 transition-all shadow-sm">
                 <ArrowUp size={20} />
               </div>
@@ -66,15 +66,15 @@ const Footer = () => {
         <div className="mt-10 sm:mt-16 md:mt-20 pt-6 sm:pt-8 border-t border-stone-100 dark:border-stone-900 flex flex-col md:flex-row justify-between items-center gap-4">
           <div className="flex flex-col gap-1">
             <p className="text-[10px] font-bold text-stone-600 dark:text-stone-400 uppercase tracking-widest">
-              Built with Next.js, Directus & Passion.
+              {t("builtWith")} Next.js, Directus &amp; Passion.
             </p>
-            <p className="text-[10px] text-stone-400 dark:text-stone-600 tracking-wide">
+            <p className="text-[10px] text-stone-500 dark:text-stone-500 tracking-wide">
               {t("aiDisclaimer")}
             </p>
           </div>
           <div className="flex items-center gap-2">
             <div className="w-2 h-2 rounded-full bg-green-500 animate-pulse" />
-            <span className="text-[10px] font-bold text-stone-600 dark:text-stone-400 uppercase tracking-widest">Systems Online</span>
+            <span className="text-[10px] font-bold text-stone-600 dark:text-stone-400 uppercase tracking-widest">{t("systemsOnline")}</span>
           </div>
         </div>
       </div>

app/components/Projects.tsx

@@ -39,7 +39,7 @@ const Projects = () => {
           setProjects(data.projects || []);
         }
       } catch (error) {
-        console.error("Featured projects fetch failed:", error);
+        if (process.env.NODE_ENV === "development") console.error("Featured projects fetch failed:", error);
       } finally {
         setLoading(false);
       }

app/components/ReadBooks.tsx

@@ -72,7 +72,7 @@ const ReadBooks = () => {
         }
       } catch (error) {
         if (process.env.NODE_ENV === "development") {
-          console.error("Error fetching book reviews:", error);
+          if (process.env.NODE_ENV === "development") console.error("Error fetching book reviews:", error);
         }
         setReviews([]);
       } finally {

app/components/ThemeProvider.tsx

@@ -1,36 +1,63 @@
 "use client";
 
-import React, { createContext, useContext, useEffect, useState } from "react";
+import React, { createContext, useCallback, useContext, useEffect, useState } from "react";
 
-type Theme = "light" | "dark";
+type Theme = "system" | "light" | "dark";
 
-const ThemeCtx = createContext<{ theme: Theme; setTheme: (t: Theme) => void }>({
-  theme: "light",
+const ThemeCtx = createContext<{ theme: Theme; resolvedTheme: "light" | "dark"; setTheme: (t: Theme) => void }>({
+  theme: "system",
+  resolvedTheme: "light",
   setTheme: () => {},
 });
 
+function getSystemTheme(): "light" | "dark" {
+  if (typeof window === "undefined") return "light";
+  return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
+}
+
+function applyTheme(theme: Theme) {
+  const resolved = theme === "system" ? getSystemTheme() : theme;
+  document.documentElement.classList.toggle("dark", resolved === "dark");
+  return resolved;
+}
+
 export function ThemeProvider({ children }: { children: React.ReactNode }) {
-  const [theme, setThemeState] = useState<Theme>("light");
+  const [theme, setThemeState] = useState<Theme>("system");
+  const [resolvedTheme, setResolvedTheme] = useState<"light" | "dark">("light");
 
   useEffect(() => {
     try {
       const stored = localStorage.getItem("theme") as Theme | null;
-      if (stored === "dark" || stored === "light") {
+      if (stored === "dark" || stored === "light" || stored === "system") {
         setThemeState(stored);
-        document.documentElement.classList.toggle("dark", stored === "dark");
       }
     } catch {}
   }, []);
 
-  const setTheme = (t: Theme) => {
+  useEffect(() => {
+    const resolved = applyTheme(theme);
+    setResolvedTheme(resolved);
+  }, [theme]);
+
+  useEffect(() => {
+    if (theme !== "system") return;
+    const mql = window.matchMedia("(prefers-color-scheme: dark)");
+    const handler = () => {
+      const resolved = applyTheme(theme);
+      setResolvedTheme(resolved);
+    };
+    mql.addEventListener("change", handler);
+    return () => mql.removeEventListener("change", handler);
+  }, [theme]);
+
+  const setTheme = useCallback((t: Theme) => {
     setThemeState(t);
     try {
       localStorage.setItem("theme", t);
     } catch {}
-    document.documentElement.classList.toggle("dark", t === "dark");
-  };
+  }, []);
 
-  return <ThemeCtx.Provider value={{ theme, setTheme }}>{children}</ThemeCtx.Provider>;
+  return <ThemeCtx.Provider value={{ theme, resolvedTheme, setTheme }}>{children}</ThemeCtx.Provider>;
 }
 
 export function useTheme() {

app/components/ThemeToggle.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import * as React from "react";
-import { Moon, Sun } from "lucide-react";
+import { Monitor, Moon, Sun } from "lucide-react";
 import { useTheme } from "./ThemeProvider";
 
 export function ThemeToggle() {
@@ -16,17 +16,25 @@ export function ThemeToggle() {
     return <div className="w-9 h-9" />;
   }
 
+  const cycle = () => {
+    const next = theme === "system" ? "light" : theme === "light" ? "dark" : "system";
+    setTheme(next);
+  };
+
   return (
     <button
-      onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
-      className="p-2 rounded-full bg-stone-100 dark:bg-stone-800 text-stone-800 dark:text-stone-100 hover:bg-stone-200 dark:hover:bg-stone-700 transition-colors border border-stone-200 dark:border-stone-700 shadow-sm hover:scale-105 active:scale-95 transition-transform"
-      aria-label="Toggle theme"
+      onClick={cycle}
+      className="p-2 rounded-full bg-stone-100 dark:bg-stone-800 text-stone-800 dark:text-stone-100 hover:bg-stone-200 dark:hover:bg-stone-700 border border-stone-200 dark:border-stone-700 shadow-sm hover:scale-105 active:scale-95 transition-all"
+      aria-label={`Current theme: ${theme}. Click to switch.`}
+      title={theme === "system" ? "System" : theme === "dark" ? "Dark" : "Light"}
     >
-      {theme === "dark" ? (
+      {theme === "system" ? (
+        <Monitor size={18} className="text-stone-500 dark:text-stone-300" />
+      ) : theme === "dark" ? (
         <Sun size={18} className="text-amber-400" />
       ) : (
         <Moon size={18} className="text-stone-600" />
       )}
     </button>
   );
-}
+}

app/layout.tsx

@@ -34,8 +34,8 @@ export default async function RootLayout({
         <meta charSet="utf-8" />
         <link rel="preconnect" href="https://assets.hardcover.app" />
         <link rel="preconnect" href="https://cms.dk0.dev" />
-        {/* Prevent flash of unstyled theme — reads localStorage before React hydrates */}
-        <script dangerouslySetInnerHTML={{ __html: `try{var t=localStorage.getItem('theme');if(t==='dark')document.documentElement.classList.add('dark');}catch(e){}` }} />
+        {/* Prevent flash of unstyled theme — reads localStorage + system preference before React hydrates */}
+        <script dangerouslySetInnerHTML={{ __html: `try{var t=localStorage.getItem('theme');var d=t==='dark'||((!t||t==='system')&&window.matchMedia('(prefers-color-scheme:dark)').matches);if(d)document.documentElement.classList.add('dark');}catch(e){}` }} />
       </head>
       <body className={`${inter.variable} ${playfair.variable}`} suppressHydrationWarning>
         <div className="grain-overlay" aria-hidden="true" />

app/legal-notice/page.tsx

@@ -29,7 +29,8 @@ export default function LegalNotice() {
   }, [locale]);
 
   return (
-    <div className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 transition-colors duration-500">
+    <>
+    <div className="min-h-screen bg-stone-50 dark:bg-stone-950 transition-colors duration-500">
       <Header />
       <main className="max-w-7xl mx-auto px-6 pt-40 pb-20">
 
@@ -116,7 +117,7 @@ export default function LegalNotice() {
                 <Clock className="text-liquid-purple" size={20} />
                 <div>
                   <p className="text-[10px] font-black uppercase tracking-widest text-stone-400">Last Review</p>
-                  <p className="font-bold text-stone-900 dark:text-stone-100 text-sm">February 15, 2025</p>
+                  <p className="font-bold text-stone-900 dark:text-stone-100 text-sm">May 14, 2025</p>
                 </div>
               </div>
               <p className="text-xs text-stone-500 leading-relaxed">
@@ -127,7 +128,8 @@ export default function LegalNotice() {
           </div>
         </div>
       </main>
+      </div>
       <Footer />
-    </div>
+    </>
   );
 }

app/manage/page.tsx

@@ -49,7 +49,9 @@ const AdminPage = () => {
         return data.csrfToken;
       }
     } catch {
-      console.error('Failed to fetch CSRF token');
+      if (process.env.NODE_ENV === 'development') {
+        console.error('Failed to fetch CSRF token');
+      }
     }
     return '';
   }, []);
@@ -339,7 +341,7 @@ const AdminPage = () => {
                 </p>
               </div>
 
-              <form onSubmit={handleLogin} className="space-y-4">
+              <form onSubmit={handleLogin} className="space-y-4" aria-label="Admin login form">
                 <div>
                   <div className="relative">
                     <input
@@ -355,7 +357,7 @@ const AdminPage = () => {
                       onClick={() => setAuthState(prev => ({ ...prev, showPassword: !prev.showPassword }))}
                       className="absolute right-4 top-1/2 -translate-y-1/2 text-stone-400 hover:text-stone-700 dark:hover:text-stone-200 p-1 transition-colors"
                     >
-                      {authState.showPassword ? '👁️' : '👁️‍🗨️'}
+                      {authState.showPassword ? 'Hide' : 'Show'}
                     </button>
                   </div>
                   {authState.error && (

app/not-found.tsx

@@ -4,10 +4,13 @@ import { ArrowLeft, Search } from "lucide-react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
 import { useEffect, useState } from "react";
+import { useLocale, useTranslations } from "next-intl";
 
 export default function NotFound() {
   const [mounted, setMounted] = useState(false);
   const router = useRouter();
+  const locale = useLocale();
+  const t = useTranslations("notFound");
 
   useEffect(() => {
     setMounted(true);
@@ -16,7 +19,7 @@ export default function NotFound() {
   if (!mounted) return null;
 
   return (
-    <main className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 py-16 sm:py-20 md:py-24 px-4 sm:px-6 flex items-center justify-center transition-colors duration-500">
+    <main className="min-h-screen bg-stone-50 dark:bg-stone-950 py-16 sm:py-20 md:py-24 px-4 sm:px-6 flex items-center justify-center transition-colors duration-500">
       <div className="max-w-7xl mx-auto w-full">
         <div className="grid grid-cols-1 md:grid-cols-12 gap-4 sm:gap-6 md:gap-8 max-w-5xl mx-auto">
 
@@ -26,28 +29,30 @@ export default function NotFound() {
                 <div className="w-10 h-10 rounded-2xl bg-stone-900 dark:bg-stone-50 flex items-center justify-center text-white dark:text-stone-900 font-black text-xs">
                   404
                 </div>
-                <span className="text-[10px] font-black uppercase tracking-[0.3em] text-stone-400">Error Report</span>
+                <span className="text-[10px] font-black uppercase tracking-[0.3em] text-stone-400">{t("errorReport")}</span>
               </div>
               <h1 className="text-4xl sm:text-5xl md:text-8xl font-black tracking-tighter uppercase text-stone-900 dark:text-stone-50 leading-[0.85] mb-4 sm:mb-6 md:mb-8">
-                Page not <br/>Found<span className="text-liquid-mint">.</span>
+                {t("title").split(" ").map((word, i) => (
+                  <span key={i}>{i > 0 ? " " : ""}{word}{i === 0 ? "" : ""}{i === t("title").split(" ").length - 1 ? <span className="text-emerald-600 dark:text-emerald-400">.</span> : ""}</span>
+                ))}
               </h1>
-              <p className="text-base sm:text-lg md:text-xl lg:text-2xl font-light text-stone-500 max-w-md leading-relaxed">
-                The content you are looking for has been moved, deleted, or never existed.
+              <p className="text-base sm:text-lg md:text-xl lg:text-2xl font-light text-stone-500 dark:text-stone-400 max-w-md leading-relaxed">
+                {t("description")}
               </p>
             </div>
 
             <div className="mt-8 sm:mt-10 md:mt-12 flex flex-wrap gap-3 sm:gap-4">
               <Link
-                href="/en"
+                href={`/${locale}`}
                 className="group relative px-6 sm:px-10 py-3 sm:py-4 bg-stone-900 dark:bg-stone-50 text-white dark:text-stone-900 rounded-xl sm:rounded-2xl font-black text-xs uppercase tracking-[0.2em] shadow-xl hover:scale-105 transition-all"
               >
-                Return Home
+                {t("returnHome")}
               </Link>
               <button
                 onClick={() => router.back()}
                 className="px-6 sm:px-10 py-3 sm:py-4 bg-white dark:bg-stone-800 text-stone-900 dark:text-stone-100 border border-stone-200 dark:border-stone-700 rounded-xl sm:rounded-2xl font-black text-xs uppercase tracking-[0.2em] hover:bg-stone-50 dark:hover:bg-stone-700 transition-all"
               >
-                Go Back
+                {t("goBack")}
               </button>
             </div>
           </div>
@@ -55,14 +60,14 @@ export default function NotFound() {
           <div className="md:col-span-12 bg-stone-900 rounded-2xl sm:rounded-[2.5rem] p-6 sm:p-8 md:p-10 border border-stone-800 shadow-2xl text-white relative overflow-hidden group flex flex-col justify-between min-h-[200px]">
             <div className="relative z-10">
               <Search className="text-liquid-mint mb-4 sm:mb-6" size={28} />
-              <h3 className="text-xl sm:text-2xl font-black uppercase tracking-tighter mb-1 sm:mb-2">Explore Work</h3>
-              <p className="text-stone-400 text-sm font-medium">Maybe what you need is in my project archive?</p>
+              <h3 className="text-xl sm:text-2xl font-black uppercase tracking-tighter mb-1 sm:mb-2">{t("exploreWork")}</h3>
+              <p className="text-stone-400 text-sm font-medium">{t("exploreWorkDesc")}</p>
             </div>
             <Link
-              href="/en/projects"
+              href={`/${locale}/projects`}
               className="mt-5 sm:mt-8 inline-flex items-center gap-2 text-[10px] font-black uppercase tracking-widest text-liquid-mint group-hover:gap-4 transition-all"
             >
-              View Projects <ArrowLeft className="rotate-180" size={14} />
+              {t("viewProjects")} <ArrowLeft className="rotate-180" size={14} />
             </Link>
             <div className="absolute top-0 right-0 w-32 h-32 bg-liquid-mint/5 blur-3xl rounded-full -mr-16 -mt-16" />
           </div>

app/privacy-policy/page.tsx

@@ -29,7 +29,8 @@ export default function PrivacyPolicy() {
   }, [locale]);
 
   return (
-    <div className="min-h-screen bg-[#fdfcf8] dark:bg-stone-950 transition-colors duration-500">
+    <>
+    <div className="min-h-screen bg-stone-50 dark:bg-stone-950 transition-colors duration-500">
       <Header />
       <main className="max-w-7xl mx-auto px-6 pt-40 pb-20">
 
@@ -150,7 +151,7 @@ export default function PrivacyPolicy() {
                   <p className="text-xl font-light leading-relaxed text-stone-600 dark:text-stone-400">
                     Diese Datenschutzerklärung wird regelmäßig aktualisiert, um den gesetzlichen Anforderungen zu entsprechen. Die jeweils aktuelle Version finden Sie auf dieser Seite.
                   </p>
-                  <p className="text-sm text-stone-400 dark:text-stone-500 mt-6">Letzte Aktualisierung: April 2025</p>
+                  <p className="text-sm text-stone-500 dark:text-stone-400 mt-6">Letzte Aktualisierung: Mai 2025</p>
                 </section>
               </div>
             )}
@@ -196,7 +197,7 @@ export default function PrivacyPolicy() {
               <p className="text-stone-900 dark:text-stone-50 font-bold mb-4">Your connection is private and secure.</p>
               <button
                 onClick={() => {
-                  localStorage.removeItem('cookie-consent');
+                  document.cookie = 'dk0_consent_v1=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT'; localStorage.removeItem('cookie-consent');
                   window.location.reload();
                 }}
                 className="text-[10px] font-black uppercase tracking-widest border-b border-stone-300 dark:border-stone-700 pb-1 hover:text-liquid-mint transition-colors"
@@ -208,7 +209,8 @@ export default function PrivacyPolicy() {
           </div>
         </div>
       </main>
+      </div>
       <Footer />
-    </div>
+    </>
   );
 }

messages/de.json

@@ -161,6 +161,40 @@
     "privacySettings": "Datenschutz-Einstellungen",
     "privacySettingsTitle": "Datenschutz-Banner wieder anzeigen",
     "builtWith": "Built with",
-    "aiDisclaimer": "Einige Inhalte dieser Seite können KI-generiert sein."
+    "aiDisclaimer": "Einige Inhalte dieser Seite können KI-generiert sein.",
+    "backToTop": "Nach oben",
+    "systemsOnline": "Systeme online"
+  },
+  "notFound": {
+    "title": "Seite nicht gefunden",
+    "description": "Der gesuchte Inhalt wurde verschoben, gelöscht oder hat nie existiert.",
+    "returnHome": "Zurück zur Startseite",
+    "goBack": "Zurück",
+    "exploreWork": "Arbeiten entdecken",
+    "exploreWorkDesc": "Vielleicht findest du, was du suchst, in meinem Projektarchiv?",
+    "viewProjects": "Projekte ansehen",
+    "errorReport": "Fehlerbericht"
+  },
+  "books": {
+    "title": "Bibliothek",
+    "subtitle": "Bücher, die meine Denkweise verändert und mein Wissen erweitert haben.",
+    "backHome": "Zurück",
+    "empty": "Noch keine Bücher."
+  },
+  "about": {
+    "status": "Status",
+    "aiAssistant": "KI-Assistent",
+    "library": "Bibliothek",
+    "viewAll": "Alle ansehen",
+    "myGear": "Mein Gear",
+    "gearMain": "Main",
+    "gearPC": "PC",
+    "gearServer": "Server",
+    "gearOS": "OS",
+    "curiosity": "Neugier über die Softwareentwicklung hinaus.",
+    "connect": "Verbinden",
+    "email": "E-Mail",
+    "code": "Code",
+    "professional": "Beruflich"
   }
 }

messages/en.json

@@ -164,7 +164,41 @@
     "privacySettings": "Privacy settings",
     "privacySettingsTitle": "Show privacy settings banner again",
     "builtWith": "Built with",
-    "aiDisclaimer": "Some content on this site may be AI-assisted."
+    "aiDisclaimer": "Some content on this site may be AI-assisted.",
+    "backToTop": "Back to top",
+    "systemsOnline": "Systems Online"
+  },
+  "notFound": {
+    "title": "Page not Found",
+    "description": "The content you are looking for has been moved, deleted, or never existed.",
+    "returnHome": "Return Home",
+    "goBack": "Go Back",
+    "exploreWork": "Explore Work",
+    "exploreWorkDesc": "Maybe what you need is in my project archive?",
+    "viewProjects": "View Projects",
+    "errorReport": "Error Report"
+  },
+  "books": {
+    "title": "Library",
+    "subtitle": "Books that shaped my mindset and expanded my horizons.",
+    "backHome": "Back Home",
+    "empty": "No books yet."
+  },
+  "about": {
+    "status": "Status",
+    "aiAssistant": "AI Assistant",
+    "library": "Library",
+    "viewAll": "View All",
+    "myGear": "My Gear",
+    "gearMain": "Main",
+    "gearPC": "PC",
+    "gearServer": "Server",
+    "gearOS": "OS",
+    "curiosity": "Curiosity beyond software engineering.",
+    "connect": "Connect",
+    "email": "Email",
+    "code": "Code",
+    "professional": "Professional"
   }
 }