At full size the dock's own button becomes its collapse, and closing hands the panel back

Plugin/unraid/pages/scheduler.php

@@ -2387,28 +2387,43 @@ function vvAiDockAppend(html) {
 function vvAiDockExpand() {
   document.getElementById('vv-ai-dock-body').style.display = '';
   document.getElementById('vv-ai-dock-hide').style.display = '';
+  vvAiDockApplyGrow();
   requestAnimationFrame(vvFitRight);
 }
 
-// Trades panel space between the conversation and whatever is above it. Separate from collapse,
-// which is all-or-nothing: this is for reading a long answer without losing sight of the log.
+// One control, two jobs, decided by what is on screen: grow the conversation, or — once it is
+// already holding the panel — close it. A dedicated shrink-back would be a third state nobody
+// asked for; at full size the only thing left to want is the view above.
+//
+// Closing from expanded also gives the size back. Without that, 82% is a one-way door: the next
+// question reopens at 82%, the button is a collapse again, and nothing ever restores the 40%.
 function vvAiDockGrow() {
-  vvAiDockBig = !vvAiDockBig;
+  const open = vvAiDockBodyOpen();
+  vvAiDockBig = !(vvAiDockBig && open);
   localStorage.setItem('vv-ai-dock-big', vvAiDockBig ? '1' : '0');
-  vvAiDockApplyGrow();
-  // Growing a hidden conversation would look like the button did nothing, so opening it is part
-  // of growing. Shrinking deliberately does not collapse — that is what the ▾ button is for.
   if (vvAiDockBig) vvAiDockExpand();
-  else             requestAnimationFrame(vvFitRight);
+  else             vvAiDockCollapse();
 }
 
+function vvAiDockBodyOpen() {
+  const b = document.getElementById('vv-ai-dock-body');
+  return !!b && b.style.display !== 'none';
+}
+
+// Called by expand and collapse as well as on load, so the button always describes the action it
+// will actually perform. A stored "expanded" preference with the conversation shut still reads as
+// grow — collapsing something already closed is not an action worth offering.
 function vvAiDockApplyGrow() {
   const b = document.getElementById('vv-ai-dock-grow');
   if (!b) return;
-  b.textContent = vvAiDockBig ? '⤡' : '⤢';
-  b.title       = vvAiDockBig ? 'Give the panel back to the view above'
-                              : 'Give the conversation more of the panel';
-  b.classList.toggle('vv-ai-dock-grow-on', vvAiDockBig);
+  const collapses = vvAiDockBig && vvAiDockBodyOpen();
+  b.textContent = collapses ? '▾' : '⤢';
+  b.title       = collapses ? 'Collapse — the conversation is kept'
+                            : 'Give the conversation more of the panel';
+  b.classList.toggle('vv-ai-dock-grow-on', collapses);
+  // Two collapse buttons side by side is one too many. While this one collapses, the other hides.
+  const hide = document.getElementById('vv-ai-dock-hide');
+  if (hide && collapses) hide.style.display = 'none';
 }
 
 // Collapse is not clear. Re-expanding shows the same conversation, so you can shrink it to read
@@ -2416,6 +2431,11 @@ function vvAiDockApplyGrow() {
 function vvAiDockCollapse() {
   document.getElementById('vv-ai-dock-body').style.display = 'none';
   document.getElementById('vv-ai-dock-hide').style.display = 'none';
+  // Closing hands the panel back, whichever button did it, so the next question opens at the
+  // ordinary size instead of inheriting a decision made about a different answer.
+  vvAiDockBig = false;
+  localStorage.setItem('vv-ai-dock-big', '0');
+  vvAiDockApplyGrow();
   requestAnimationFrame(vvFitRight);
 }