flatten monorepo, migrate off Vercel

- Remove penfield (split to own repo on Forgejo)
- Move www/ contents to root, rename to wynne.rs
- Swap @astrojs/vercel for @astrojs/node, upgrade to Astro 6
- Remove auth-astro/GitHub OAuth (TinyAuth at proxy layer)
- Remove Vercel deploy webhook
- Switch to local SQLite DB (drop Turso)
- Update generate-stats.js for new build output paths

public/js/params.js

@@ -0,0 +1,64 @@
+!function() {
+  var p = new URLSearchParams(location.search);
+
+  var just = p.get('just');
+  if (just && /^[a-z0-9-]+$/.test(just)) {
+    document.documentElement.dataset.just = just;
+    var css = 'section[data-section]:not([data-section="' + just + '"]){display:none}';
+    document.head.appendChild(Object.assign(document.createElement('style'), { textContent: css }));
+  }
+
+  var act = p.get('do');
+  var urls = window.__urls;
+  if (urls && urls.length) {
+    if (act === 'random') {
+      var url = urls[Math.floor(Math.random() * urls.length)];
+      location.replace(url.startsWith('http') ? url : location.origin + url);
+    }
+    if (act === 'newest') {
+      location.replace(urls[0].startsWith('http') ? urls[0] : location.origin + urls[0]);
+    }
+  }
+  if (act === 'admin') {
+    location.replace('/admin');
+  }
+
+  if (p.has('compact')) document.documentElement.dataset.compact = '';
+
+  var has = p.get('has');
+  if (has) {
+    document.documentElement.dataset.has = has;
+    has = has.toLowerCase();
+  }
+
+  document.addEventListener('DOMContentLoaded', function() {
+    if (has) {
+      document.querySelectorAll('section[data-section] .entry').forEach(function(entry) {
+        if (entry.textContent.toLowerCase().indexOf(has) === -1) {
+          entry.style.display = 'none';
+        }
+      });
+      document.querySelectorAll('.guestbook-entry').forEach(function(entry) {
+        if (entry.textContent.toLowerCase().indexOf(has) === -1) {
+          entry.style.display = 'none';
+        }
+      });
+    }
+
+    document.querySelectorAll('.section-label').forEach(function(a) {
+      var link = new URLSearchParams(a.search);
+      p.forEach(function(v, k) { if (!link.has(k)) link.set(k, v); });
+      a.href = '?' + link.toString();
+    });
+
+    var find = document.getElementById('find');
+    if (find) find.addEventListener('click', function(e) {
+      e.preventDefault();
+      var term = prompt('find:');
+      if (!term) return;
+      var q = new URLSearchParams(location.search);
+      q.set('has', term);
+      location.search = q.toString();
+    });
+  });
+}();