Hold Conversations and Tokens to the Assistant's height

A stretched grid item is measured before it is stretched, so a long card grew the row it was
meant to fit inside and then filled it; the ceiling is taken from the Assistant instead.

Plugin/unraid/pages/monitor.php

@@ -2087,6 +2087,36 @@ function vvRenderTokens() {
   box.innerHTML = h;
 }
 
+// ── AI row height ────────────────────────────────────────────────────────────
+// Conversations and Tokens are capped to the Assistant and scroll inside that cap. CSS cannot
+// state this on its own: align-self:stretch makes an item fill its grid track, but the track was
+// sized from the item's own content first, so a card with a long list simply grows the row and
+// then dutifully fills the bigger row. Measuring the Assistant breaks that circle — it is the
+// only card in the row whose height is decided by nothing but itself.
+//
+// Applied only in the eight-column layout. Below 1025px the Assistant drops to a row of its own
+// and stops being what these two sit beside, so a cap taken from it would describe nothing.
+function vvAiRowSync() {
+  const asst  = document.getElementById('vv-ai-assistant-card');
+  const chats = document.getElementById('vv-ai-chats-card');
+  const toks  = document.getElementById('vv-ai-tokens-card');
+  const stats = document.getElementById('vv-ai-stats-card');
+  if (!asst || !chats) return;
+
+  if (!window.matchMedia('(min-width: 1025px)').matches) {
+    chats.style.maxHeight = '';
+    if (toks) toks.style.maxHeight = '';
+    return;
+  }
+
+  const h = asst.offsetHeight;
+  chats.style.maxHeight = h + 'px';
+  // Tokens is in the second row, under AI — its share is what the Assistant leaves once the
+  // first row and the 12px gap are taken. Floored so it stays a card rather than a sliver on a
+  // short viewport where the AI card happens to be tall.
+  if (toks && stats) toks.style.maxHeight = Math.max(140, h - stats.offsetHeight - 12) + 'px';
+}
+
 // Delegated on the container, which survives every render — the rows inside do not, and binding
 // per row would rebind the whole list on each poll to no purpose.
 if (document.getElementById('vv-ai-tokens-body')) {
@@ -2822,5 +2852,20 @@ if (document.getElementById('vv-mon-ai-chat')) {
   });
   vvMonChatList = VvAiChatList({ into: 'vv-mon-ai-chats', chat: vvMonChat });
   vvMonChatList.reload();
+
+  // Re-measured rather than computed once. The Assistant changes height when the transcript is
+  // expanded, and the AI card above changes when its first real payload replaces "Loading...";
+  // both move the ceiling these two cards sit under. Observing the two sources covers each
+  // without watching the cards being adjusted, so there is no feedback loop. The resize listener
+  // is for crossing the 1025px breakpoint, which changes whether a cap applies at all.
+  vvAiRowSync();
+  if (window.ResizeObserver) {
+    const ro = new ResizeObserver(vvAiRowSync);
+    ['vv-ai-assistant-card', 'vv-ai-stats-card'].forEach(id => {
+      const el = document.getElementById(id);
+      if (el) ro.observe(el);
+    });
+  }
+  window.addEventListener('resize', vvAiRowSync);
 }
 </script>