Add author auth, forking, tags, and stats tracking

Introduce token-based author authentication (register/verify API),
   skill forking with EditGate protection, tag metadata on skills,
   and download/push stats. Enhanced push scripts with token auth
   and per-skill filtering. Updated UI with stats, tags, and
   author info on skill cards.

dist/server/pages/api/auth/register.astro.mjs

@@ -0,0 +1,55 @@
+import { h as hasToken, g as generateToken } from '../../../chunks/tokens_CAzj9Aj8.mjs';
+export { renderers } from '../../../renderers.mjs';
+
+const POST = async ({ request }) => {
+  let body;
+  try {
+    body = await request.json();
+  } catch {
+    return new Response(JSON.stringify({ error: "Invalid JSON" }), {
+      status: 400,
+      headers: { "Content-Type": "application/json" }
+    });
+  }
+  const { email, name } = body;
+  if (!email) {
+    return new Response(JSON.stringify({ error: "email is required" }), {
+      status: 400,
+      headers: { "Content-Type": "application/json" }
+    });
+  }
+  if (await hasToken(email)) {
+    return new Response(JSON.stringify({ error: "Email already registered" }), {
+      status: 409,
+      headers: { "Content-Type": "application/json" }
+    });
+  }
+  try {
+    const token = await generateToken(email, name || "");
+    return new Response(JSON.stringify({ token }), {
+      status: 201,
+      headers: { "Content-Type": "application/json" }
+    });
+  } catch (err) {
+    const message = err instanceof Error ? err.message : "Unknown error";
+    if (message.includes("already registered")) {
+      return new Response(JSON.stringify({ error: message }), {
+        status: 409,
+        headers: { "Content-Type": "application/json" }
+      });
+    }
+    return new Response(JSON.stringify({ error: message }), {
+      status: 500,
+      headers: { "Content-Type": "application/json" }
+    });
+  }
+};
+
+const _page = /*#__PURE__*/Object.freeze(/*#__PURE__*/Object.defineProperty({
+  __proto__: null,
+  POST
+}, Symbol.toStringTag, { value: 'Module' }));
+
+const page = () => _page;
+
+export { page };