Move inline template scripts into webpack-built assets

Several templates had their own <script> blocks instead of going
through webpack like game1.js already does. Extracted the waiting
page, lobby page, and admin session-log tab scripts into their own
files under assets/, imported from the main app.js entry. Since
app.js is already loaded on every page, each module just reads its
own data-* attributes and no-ops if its target element isn't present
on the current page - same pattern game1.js already uses.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

assets/admin-session-tabs.js

@@ -0,0 +1,27 @@
+document.addEventListener('DOMContentLoaded', () => {
+    const buttons = document.querySelectorAll('[data-tab-target]');
+    if (!buttons.length) {
+        return;
+    }
+
+    const activate = (id) => {
+        document.querySelectorAll('[id^="player-"]').forEach(el => el.style.display = 'none');
+        const target = document.getElementById(id);
+        if (target) {
+            target.style.display = 'block';
+        }
+
+        buttons.forEach(btn => {
+            const active = btn.dataset.tabTarget === id;
+            btn.style.background = active ? '#fff' : '#f8fafc';
+            btn.style.color = active ? '#1e40af' : '#64748b';
+            btn.style.fontWeight = active ? '600' : '400';
+            btn.style.borderColor = active ? '#3b82f6' : '#e2e8f0';
+            btn.style.borderBottom = active ? '1px solid #fff' : '1px solid #e2e8f0';
+        });
+    };
+
+    buttons.forEach(btn => {
+        btn.addEventListener('click', () => activate(btn.dataset.tabTarget));
+    });
+});