feat(ui): update sponsor logo image

Replace sponzor34.png with updated version.

.gitignore

@@ -0,0 +1,2 @@
+logo-variants/
+nul

tools/validate-match-order.js

@@ -0,0 +1,44 @@
+// Validation harness: runs the real js/facr-frontend.js with a minimal DOM stub
+// and prints the rendered order of matches in #facr-all-matches.
+const fs = require('fs');
+const vm = require('vm');
+
+const JS_FILE = 'W:/Downloads/HTML_projekty/bizoni/js/facr-frontend.js';
+const LOCAL_JSON = 'W:/Downloads/HTML_projekty/bizoni/data/club.json';
+const LIVE_URL = 'https://bizoniuh.cz/data/club.json';
+
+async function run(data, label) {
+  const code = fs.readFileSync(JS_FILE, 'utf8');
+  const container = { innerHTML: '' };
+  let initFn = null;
+
+  const sandbox = {
+    console,
+    setInterval: () => 0,
+    clearInterval: () => {},
+    Date,
+    document: {
+      addEventListener: (ev, cb) => { if (ev === 'DOMContentLoaded') initFn = cb; },
+      getElementById: (id) => (id === 'facr-all-matches' ? container : null),
+      createElement: () => ({ appendChild() {}, style: {} }),
+      head: { appendChild() {} },
+    },
+    fetch: async () => ({ ok: true, json: async () => data }),
+  };
+  sandbox.window = sandbox;
+  vm.createContext(sandbox);
+  vm.runInContext(code, sandbox);
+
+  await initFn();
+
+  const dates = container.innerHTML.match(/\d{2}\.\d{2}\.\d{4} \d{2}:\d{2}/g) || [];
+  console.log(`\n=== ${label} ===`);
+  dates.forEach((d, i) => console.log(`${String(i + 1).padStart(2)}. ${d}`));
+}
+
+(async () => {
+  const local = JSON.parse(fs.readFileSync(LOCAL_JSON, 'utf8'));
+  await run(local, 'local data/club.json');
+  const live = await (await fetch(LIVE_URL)).json();
+  await run(live, 'live bizoniuh.cz/data/club.json');
+})().catch(e => { console.error('FAILED:', e); process.exit(1); });