chore: upgrade to React 19 and use images.remotePatterns

Fixes Next.js 16 deprecation warnings for React 18 and images.domains.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

components/ProjectCard.js

@@ -1,48 +0,0 @@
-import Link from 'next/link';
-import Icon from './Icon';
-
-export default function ProjectCard({ project }) {
-  const { title, description, tags, href, repo, featured, internal } = project;
-  const primaryHref = href || repo;
-
-  return (
-    <article className={`project-card ${featured ? 'is-featured' : ''}`}>
-      <div className="project-top">
-        {featured ? (
-          <span className="pill pill-accent">
-            <span className="live-dot" /> Live
-          </span>
-        ) : (
-          <Icon name="github" size={20} className="project-glyph" />
-        )}
-        {repo && href && (
-          <a href={repo} target="_blank" rel="noopener noreferrer" className="project-repo" aria-label={`${title} source code`}>
-            <Icon name="github" size={16} />
-          </a>
-        )}
-      </div>
-
-      <h3 className="project-title">
-        {internal ? (
-          <Link href={primaryHref} className="project-link">
-            {title}
-          </Link>
-        ) : (
-          <a href={primaryHref} target="_blank" rel="noopener noreferrer" className="project-link">
-            {title}
-          </a>
-        )}
-        <Icon name="arrowUpRight" size={18} className="project-arrow" />
-      </h3>
-      <p className="project-description">{description}</p>
-
-      <ul className="tag-list">
-        {tags.map((tag) => (
-          <li key={tag} className="tag">
-            {tag}
-          </li>
-        ))}
-      </ul>
-    </article>
-  );
-}