Size the Scheduler panel from the height the dock reports, not one read mid-animation

.vv-ai-chat transitions its height, so measuring the dock straight after setting
it returns the height it is animating away from — the view was cut short for a
dock that had already shrunk, leaving the difference as dead panel underneath.

Plugin/unraid/include/ai_chat.php

@@ -1856,12 +1856,23 @@ vv_ai_profiles_script();
       return b.offsetHeight + m;
     }
 
+    // Returns the height it just applied, in pixels, or null when that is not a number this side
+    // can know — a placement sized in vh resolves only against the viewport, and one that has not
+    // been given heights yet has nothing to report.
+    //
+    // It reports rather than letting the caller measure because .vv-ai-chat transitions its height
+    // (see the rule in the stylesheet). offsetHeight read straight after this returns the height
+    // the box is animating FROM, not the one just asked for, and a page that sizes a sibling from
+    // that figure sizes it for a dock that no longer exists by the time anyone looks. On the
+    // Scheduler that left the panel's bottom third dead: the view was cut short for a tall dock,
+    // the dock then shrank to its collapsed share, and nothing re-measured — so the gap survived
+    // until an expand/collapse fired onResize and ran the fit again against a settled box.
     function applyHeights() {
       const el    = chatEl();
       const base  = el.dataset.h || '';
       const med   = el.dataset.hTall || '';
       const big2  = el.dataset.hLarge || med;
-      if (!base || !med) return;
+      if (!base || !med) return null;
       const want = big ? (large ? big2 : med) : base;
       // Subtracted, not added to. The height the page asked for is the height the whole window
       // keeps; the list is taken out of the conversation's share of it. calc() because that height
@@ -1891,6 +1902,12 @@ vv_ai_profiles_script();
                                     : 'Expanded is medium — click for large';
         sizeBtn.classList.toggle('vv-ai-grow-on', large);
       }
+
+      // Only a plain pixel figure can be resolved here; anything else is left to the caller to
+      // measure, which is correct for the placements whose height is not a transitioning number.
+      const n = parseFloat(want);
+      if (!Number.isFinite(n) || !/^\s*[\d.]+px\s*$/.test(want)) return null;
+      return k ? Math.max(56, n - k) : n;
     }
     // Named functions, because the buttons are no longer the only way in — the shortcuts below
     // drive the same two.
@@ -2071,11 +2088,13 @@ vv_ai_profiles_script();
       // Heights supplied after the fact, for a placement whose room is a share of a panel rather
       // than a constant. Re-applies immediately at whichever of the two states is current, so a
       // resize while expanded stays expanded instead of snapping back.
+      // Hands back the pixel height it settled on, so a caller sizing a sibling from it does not
+      // have to measure a box that is mid-transition. See applyHeights().
       setHeights(base, tallMed, tallLarge) {
         const el = chatEl();
         el.dataset.h = base; el.dataset.hTall = tallMed;
         if (tallLarge) el.dataset.hLarge = tallLarge;
-        applyHeights();
+        return applyHeights();
       },
 
       // Same contract, different subject — the Scheduler pointing the chat at another script, log