feat: comprehensive SEO optimization and GDPR compliance

- Added Terms of Service and Privacy Policy pages with contact info
- Implemented Google Analytics with Consent Mode v2 for GDPR compliance
- Created sitemap.xml and robots.txt for search engine optimization
- Added dynamic meta tags, Open Graph, and structured data (JSON-LD)
- Implemented GDPR consent banner with TCF 2.2 compatibility
- Enhanced sidebar with category-colored hover states and proper active/inactive styling
- Fixed all ESLint warnings for clean deployment
- Added comprehensive SEO utilities and privacy-first analytics tracking

Ready for production deployment with full legal compliance and SEO optimization.

public/robots.txt

@@ -0,0 +1,29 @@
+# Robots.txt for https://dewe.dev
+# Generated automatically
+
+User-agent: *
+Allow: /
+
+# Sitemap location
+Sitemap: https://dewe.dev/sitemap.xml
+
+# Block any future admin or private routes
+Disallow: /admin/
+Disallow: /api/
+Disallow: /.well-known/
+
+# Allow all major search engines
+User-agent: Googlebot
+Allow: /
+
+User-agent: Bingbot
+Allow: /
+
+User-agent: Slurp
+Allow: /
+
+User-agent: DuckDuckBot
+Allow: /
+
+# Crawl delay for politeness
+Crawl-delay: 1

public/sitemap.xml

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
+        http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
+  <url>
+    <loc>https://dewe.dev/</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/object-editor</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/table-editor</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/url</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/base64</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/beautifier</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/diff</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/text-length</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/privacy</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>yearly</changefreq>
+    <priority>0.3</priority>
+  </url>
+  <url>
+    <loc>https://dewe.dev/terms</loc>
+    <lastmod>2025-01-23</lastmod>
+    <changefreq>yearly</changefreq>
+    <priority>0.3</priority>
+  </url>
+</urlset>