perf: remove Sentry client SDK and lazy-load TipTap (~830KB saved)

- Remove withSentryConfig wrapper from next.config.ts (Sentry was disabled anyway)
- Clear instrumentation-client.ts to prevent Sentry client bundle (~400KB)
- Lazy-load RichTextClient via next/dynamic in About.tsx and Contact.tsx
- Defers TipTap/ProseMirror loading until CMS data arrives (~430KB)
- Homepage First Load JS: 1479KB → 646KB (56% reduction)
- Shared JS: 182KB → 102KB (44% reduction)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

next.config.ts

@@ -3,8 +3,6 @@ import dotenv from "dotenv";
 import path from "path";
 import bundleAnalyzer from "@next/bundle-analyzer";
 import createNextIntlPlugin from "next-intl/plugin";
-import { withSentryConfig } from "@sentry/nextjs";
-
 // Load the .env file from the working directory
 dotenv.config({ path: path.resolve(process.cwd(), ".env") });
 
@@ -228,42 +226,4 @@ const withBundleAnalyzer = bundleAnalyzer({
 
 const withNextIntl = createNextIntlPlugin("./i18n/request.ts");
 
-// Wrap with Sentry
-export default withSentryConfig(
-  withBundleAnalyzer(withNextIntl(nextConfig)),
-  {
-    // For all available options, see:
-    // https://github.com/getsentry/sentry-webpack-plugin#options
-
-    org: "dk0",
-    project: "portfolio",
-
-    // Only print logs for uploading source maps in CI
-    silent: !process.env.CI,
-
-    // Upload a larger set of source maps for prettier stack traces (increases build time)
-    widenClientFileUpload: true,
-
-    // Route browser requests to Sentry through a Next.js rewrite to circumvent ad-blockers.
-    tunnelRoute: "/monitoring",
-
-    // Webpack-specific options
-    webpack: {
-      // Automatically annotate React components to show their full name in breadcrumbs and session replay
-      reactComponentAnnotation: {
-        enabled: true,
-      },
-      // Automatically tree-shake Sentry logger statements to reduce bundle size
-      treeshake: {
-        removeDebugLogging: true,
-      },
-      // Enables automatic instrumentation of Vercel Cron Monitors
-      automaticVercelMonitors: true,
-    },
-
-    // Source maps configuration
-    sourcemaps: {
-      disable: false,
-    },
-  }
-);
+export default withBundleAnalyzer(withNextIntl(nextConfig));