fix: clean URLs — /tos and /privacy instead of /tos.html and /privacy.html

- Added Express routes for /tos and /privacy
- Updated all internal links (index.html, privacy.html, tos.html)
- Updated sitemap.xml URLs
- Updated README and docs architecture

server.js

@@ -74,6 +74,19 @@ app.use((req, res, next) => {
 // NOTE: redirect: false prevents automatic redirects to index.html
 app.use(express.static(publicDir, { redirect: false }));
 
+// ══════════════════════════════════════════════════════════════
+// CLEAN URL ROUTES
+// ══════════════════════════════════════════════════════════════
+
+// Serve HTML files without .html extension
+app.get("/tos", (req, res) => {
+  res.sendFile(path.join(publicDir, "tos.html"));
+});
+
+app.get("/privacy", (req, res) => {
+  res.sendFile(path.join(publicDir, "privacy.html"));
+});
+
 // ══════════════════════════════════════════════════════════════
 // RESPONSE HELPERS
 // ══════════════════════════════════════════════════════════════