Revert "Merge branch 'fix/floating-panels-swallow-clicks'"

This reverts commit 443ea080034996bf4e0f230e0f651cd4e0d14af6, reversing
changes made to a722c74576559971be87178917adcc8b9854e4ff.

app/ui/motion_runtime.py

@@ -101,27 +101,6 @@ _DRIVER = r"""
     return true;
   }
 
-  // Perpetual motion is a stricter test than canMove.
-  //
-  // A `click` fires only when mousedown and mouseup land on the SAME element.
-  // A surface that drifts for as long as it lives — or turns under the
-  // pointer — moves every control it contains out from under the cursor
-  // between those two events, so clicks are silently swallowed and the user
-  // has to stab at the button several times before one lands. That is the
-  // same rule the button handler further down already states ("a button that
-  // moves under the cursor is a button that gets mis-clicked"); it just has
-  // to apply to the surface CARRYING the button, not only to the button.
-  //
-  // Entrance animations are deliberately exempt: they are finite and settle,
-  // so the arrival choreography is unchanged. Only never-ending motion is
-  // withheld, and only from surfaces that actually hold controls — a KPI
-  // tile or a verdict card still floats and tilts exactly as before.
-  var CONTROLS = 'button, input, select, textarea, a[href], [role="button"], ' +
-                 '[role="tab"], [role="option"], [contenteditable="true"]';
-  function canDrift(el) {
-    return canMove(el) && !el.querySelector(CONTROLS) && !el.matches(CONTROLS);
-  }
-
   // ── Depth ────────────────────────────────────────────────────────────
   // A translateZ only reads as depth when an ancestor carries a
   // perspective, and a perspective — like a transform — makes that
@@ -153,7 +132,7 @@ _DRIVER = r"""
   // long as the node lives, so nothing else may clear it. Anything that wants
   // the transform (hover, press, tilt) pauses this first and resumes after.
   function float3d(el, i) {
-    if (!canDrift(el)) return;
+    if (!canMove(el)) return;
     depthParent(el);
     el.style.transformStyle = 'preserve-3d';
     var ph = (i % 5) / 5;
@@ -179,9 +158,6 @@ _DRIVER = r"""
   // Pointer tilt. Hands over from the float and hands back on leave, because
   // two animations writing the same transform component fight each other.
   function tilt3d(el, max) {
-    // Guarded here rather than at each call site so no future caller can
-    // reintroduce a control-bearing surface that moves under the pointer.
-    if (!canDrift(el)) return;
     var frame = 0;
     el.addEventListener('pointerenter', function () { holdFloat(el); });
     el.addEventListener('pointermove', function (e) {
@@ -366,9 +342,7 @@ _DRIVER = r"""
     root.querySelectorAll('.ups-ev').forEach(function (el, i) {
       if (el.dataset.upsD) return;
       el.dataset.upsD = '1';
-      // repeat: Infinity below — same rule as float3d: an entry that never
-      // settles must not be carrying anything clickable.
-      if (!canDrift(el)) return;
+      if (!canMove(el)) return;
       depthParent(el);
       el.style.transformStyle = 'preserve-3d';
       el.__upsFloat = M.animate(el, {