Performance: PageSpeed Optimierungen implementiert

- LCP-Bild (Portrait) mit fetchpriority="high" und Preload optimiert
- Logo SVG mit expliziten width/height Attributen versehen (CLS)
- Touch-Targets in Experience Navigation von 5px auf 24px vergrößert
- Kontrast für Firmenname/Zeitraum verbessert (zinc-300/zinc-400)
- PWA Service Worker mit script-defer für nicht-blockierendes Laden
- Responsive Bilder: srcset mit 400w/800w/1200w + WebP-Format
- Neues Build-Script für Bildoptimierung (scripts/optimize-images.js)
- Original-Bilder in source-images/ verschoben (gitignored)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -79,3 +79,6 @@ supabase/.temp/
 *.sublime-workspace
 *.sublime-project
 .history/
+
+# Source images (originals before optimization)
+source-images/

index.html

@@ -125,6 +125,7 @@
   <link rel="preload" href="/fonts/inter-var.woff2" as="font" type="font/woff2" crossorigin>
 
   <!-- Preload wichtiger Assets -->
+  <link rel="preload" href="/portrait.jpg" as="image" fetchpriority="high" />
   <link rel="preload" href="/header-logo.svg" as="image" />
   <link rel="preload" href="/favicon.svg" as="image" />
 </head>

package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "vite",
     "build": "npm run generate-sitemap && vite build",
+    "build:images": "node scripts/optimize-images.js",
     "lint": "eslint .",
     "preview": "vite preview",
     "test": "vitest",

scripts/optimize-images.js

@@ -0,0 +1,115 @@
+import sharp from 'sharp';
+import { readdir, mkdir } from 'fs/promises';
+import { join, dirname, basename, extname } from 'path';
+import { fileURLToPath } from 'url';
+import { existsSync } from 'fs';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const SIZES = [400, 800, 1200];
+const INPUT_DIR = join(__dirname, '../source-images/projects');
+const OUTPUT_DIR = join(__dirname, '../public/images/projects');
+
+async function processImage(inputPath, projectSlug) {
+  const filename = basename(inputPath, extname(inputPath));
+  const ext = extname(inputPath).toLowerCase();
+
+  // Skip non-image files
+  if (!['.jpg', '.jpeg', '.png', '.webp'].includes(ext)) {
+    return;
+  }
+
+  const outputDir = join(OUTPUT_DIR, projectSlug);
+
+  // Create output directory if it doesn't exist
+  await mkdir(outputDir, { recursive: true });
+
+  console.log(`Processing: ${projectSlug}/${filename}${ext}`);
+
+  // Create optimized original size (cover.jpg)
+  const originalOutputPath = join(outputDir, `${filename}.jpg`);
+  try {
+    await sharp(inputPath)
+      .jpeg({ quality: 85, progressive: true })
+      .toFile(originalOutputPath);
+    console.log(`  Created: ${filename}.jpg (optimized original)`);
+  } catch (error) {
+    console.error(`  Error creating optimized original:`, error.message);
+  }
+
+  // Create different sizes
+  for (const width of SIZES) {
+    const outputFilename = `${filename}-${width}w.jpg`;
+    const outputPath = join(outputDir, outputFilename);
+
+    try {
+      await sharp(inputPath)
+        .resize(width, null, {
+          withoutEnlargement: true,
+          fit: 'inside'
+        })
+        .jpeg({ quality: 80, progressive: true })
+        .toFile(outputPath);
+
+      console.log(`  Created: ${outputFilename}`);
+    } catch (error) {
+      console.error(`  Error creating ${outputFilename}:`, error.message);
+    }
+  }
+
+  // Create WebP version of original size
+  const webpFilename = `${filename}.webp`;
+  const webpPath = join(outputDir, webpFilename);
+
+  try {
+    await sharp(inputPath)
+      .webp({ quality: 80 })
+      .toFile(webpPath);
+
+    console.log(`  Created: ${webpFilename}`);
+  } catch (error) {
+    console.error(`  Error creating WebP:`, error.message);
+  }
+}
+
+async function processDirectory(dirPath) {
+  if (!existsSync(dirPath)) {
+    console.error(`Error: Source directory not found: ${dirPath}`);
+    console.log('\nPlease ensure original images are placed in:');
+    console.log('  source-images/projects/<project-slug>/cover.jpg');
+    process.exit(1);
+  }
+
+  const entries = await readdir(dirPath, { withFileTypes: true });
+
+  for (const entry of entries) {
+    const fullPath = join(dirPath, entry.name);
+
+    if (entry.isDirectory()) {
+      // Check for cover.jpg in this project directory
+      const coverPath = join(fullPath, 'cover.jpg');
+      if (existsSync(coverPath)) {
+        await processImage(coverPath, entry.name);
+      } else {
+        console.log(`Skipping ${entry.name}: no cover.jpg found`);
+      }
+    }
+  }
+}
+
+async function main() {
+  console.log('Starting image optimization...');
+  console.log(`Source: ${INPUT_DIR}`);
+  console.log(`Output: ${OUTPUT_DIR}\n`);
+
+  try {
+    await processDirectory(INPUT_DIR);
+    console.log('\nImage optimization complete!');
+  } catch (error) {
+    console.error('Error during optimization:', error);
+    process.exit(1);
+  }
+}
+
+main();

src/components/Layout.tsx

@@ -156,6 +156,8 @@ const Layout = ({ children }: LayoutProps) => {
                     src="/header-logo.svg"
                     alt="Damjan Savić Logo"
                     className="h-8 w-auto"
+                    width={120}
+                    height={32}
                     whileHover={{ scale: 1.05 }}
                     transition={{ type: "spring", stiffness: 400, damping: 10 }}
                 />

src/pages/home/components/Experience.tsx

@@ -117,10 +117,10 @@ const Experience = () => {
                                         <h3 className="text-lg md:text-xl font-semibold text-white mb-1">
                                             {exp.role}
                                         </h3>
-                                        <h4 className="text-base md:text-lg text-zinc-400 mb-2">
+                                        <h4 className="text-base md:text-lg text-zinc-300 mb-2">
                                             {exp.company}
                                         </h4>
-                                        <p className="text-sm text-zinc-500 mb-6">
+                                        <p className="text-sm text-zinc-400 mb-6">
                                             {exp.period}
                                         </p>
                                         <ul className="space-y-3 md:space-y-4">
@@ -158,25 +158,32 @@ const Experience = () => {
                             >
                                 ‹
                             </button>
-                            <div className="flex items-center gap-2">
+                            <div className="flex items-center gap-1">
                                 {[...Array(totalPages)].map((_, index) => (
                                     <button
                                         key={index}
                                         onClick={() => setCurrentPage(index)}
+                                        className="relative flex items-center justify-center transition-all duration-300"
+                                        style={{
+                                            width: '24px',
+                                            height: '24px',
+                                            minWidth: '24px',
+                                            minHeight: '24px'
+                                        }}
+                                        aria-label={t('pages.home.experience.navigation.page', { page: index + 1 })}
+                                    >
+                                        <span
                                             className={`rounded-full transition-all duration-300 ${
                                                 index === currentPage
                                                     ? 'bg-white'
                                                     : 'bg-zinc-600 hover:bg-zinc-400'
                                             }`}
                                             style={{
-                                            width: '5px',
-                                            height: '5px',
-                                            minWidth: '5px',
-                                            minHeight: '5px',
-                                            padding: '0'
+                                                width: '8px',
+                                                height: '8px'
                                             }}
-                                        aria-label={t('pages.home.experience.navigation.page', { page: index + 1 })}
                                         />
+                                    </button>
                                 ))}
                             </div>
                             <button

src/pages/home/components/Hero.tsx

@@ -76,6 +76,9 @@ const Hero = () => {
                         alt={t('pages.home.hero.image.alt')}
                         className="w-full h-full object-cover"
                         loading="eager"
+                        fetchPriority="high"
+                        width={288}
+                        height={288}
                         style={{ transform: 'scale(1.01)' }}
                     />
                 </motion.div>

src/pages/portfolio/components/PortfolioCard.tsx

@@ -30,6 +30,8 @@ const PortfolioCard: React.FC<PortfolioCardProps> = ({ project }) => {
     };
 
     const imagePath = `/images/projects/${project.slug}/cover.jpg`;
+    const imagePathWebP = `/images/projects/${project.slug}/cover.webp`;
+    const srcSet = `/images/projects/${project.slug}/cover-400w.jpg 400w, /images/projects/${project.slug}/cover-800w.jpg 800w, /images/projects/${project.slug}/cover-1200w.jpg 1200w`;
 
     // Verwende technologies anstelle von tags wenn verfügbar
     const displayTags = project.technologies || project.tags;
@@ -60,14 +62,22 @@ const PortfolioCard: React.FC<PortfolioCardProps> = ({ project }) => {
             >
                 {/* Image Container */}
                 <div className="aspect-[16/9] w-full relative overflow-hidden bg-zinc-900">
+                    <picture>
+                        <source srcSet={imagePathWebP} type="image/webp" />
                         <img
                             src={imagePath}
+                            srcSet={srcSet}
+                            sizes="(max-width: 640px) 400px, (max-width: 1024px) 800px, 1200px"
                             alt={project.title}
                             className="absolute inset-0 w-full h-full object-cover transition-transform duration-700
                                      group-hover:scale-110"
                             loading="lazy"
+                            width={1200}
+                            height={675}
+                            decoding="async"
                             style={{ transformOrigin: 'center center' }}
                         />
+                    </picture>
                 </div>
 
                 {/* Content - with relative positioning to overlap the gradient */}

vite.config.ts

@@ -28,6 +28,7 @@ export default defineConfig({
     VitePWA({
       strategies: 'generateSW',
       registerType: 'autoUpdate',
+      injectRegister: 'script-defer',
       manifest: {
         name: 'Damjan Savić - JTL Integration Expert',
         short_name: 'Damjan Savić',