fix(ui): guard slider against non-numeric draft, use onPointerUp

- Range slider value now only uses rotationDraft when it parses to a
  finite number; otherwise falls back to the selected node's rotation.
  Prevents React warnings from passing "-" to type=range.
- Changed onMouseUp to onPointerUp so the slider commit also fires on
  touch devices.

Co-authored-by: DeepSeek V4 <deepseek@v4.ai>

Author: zachelnet

ui/components/panels/RenderControlsPanel.tsx

@@ -352,15 +352,20 @@ export function RenderControlsPanel() {
   }
 
   const updateSelectedRotation = async (value: number) => {
-    if (!page || !selectedNode) return
-    await applyOp(
-      ops.updateNode(page.id, selectedNode.id, {
-        transform: {
-          ...selectedNode.transform,
-          rotationDeg: clampRotationDeg(value),
-        },
-      }),
-    )
+    if (!page || selectedNodes.length === 0) return
+    const deg = clampRotationDeg(value)
+    const buildOp = (n: TextNodeEntry) =>
+      ops.updateNode(page.id, n.id, {
+        transform: { ...n.transform, rotationDeg: deg },
+      })
+    const op =
+      selectedNodes.length === 1
+        ? buildOp(selectedNodes[0])
+        : ops.batch(
+            'Multi-block rotation',
+            selectedNodes.map((n) => buildOp(n)),
+          )
+    await applyOp(op)
     queueAutoRender(page.id)
   }
 
@@ -829,11 +834,15 @@ export function RenderControlsPanel() {
             max={String(MAX_ROTATION_DEG)}
             step='1'
             disabled={!selectedNode}
-            value={rotationDraft ?? String(selectedNode?.transform.rotationDeg ?? 0)}
+            value={
+              rotationDraft != null && Number.isFinite(Number.parseFloat(rotationDraft))
+                ? String(clampRotationDeg(Number.parseFloat(rotationDraft)))
+                : String(selectedNode?.transform.rotationDeg ?? 0)
+            }
             onChange={(event) => {
               setRotationDraft(event.target.value)
             }}
-            onMouseUp={() => {
+            onPointerUp={() => {
               if (rotationDraft == null) return
               const parsed = Number.parseFloat(rotationDraft)
               setRotationDraft(null)