fix: respect suppressThrow in toSlatePoint findPath calls

When toSlatePoint is called with suppressThrow: true (e.g., from
toSlateRange during selection change handling), internal findPath calls
could still throw "Unable to find the path for Slate node" errors
during component unmount when node references become stale.

Wrap both findPath calls in try-catch blocks that return null when
suppressThrow is enabled, matching the existing error handling pattern
in the rest of the function.

Based on upstream slate-dom PR #6004.

Author: christianhg

.changeset/suppress-throw-findpath.md

@@ -0,0 +1,5 @@
+---
+'@portabletext/editor': patch
+---
+
+fix: respect suppressThrow in toSlatePoint findPath calls

packages/editor/src/slate-dom/plugin/dom-editor.ts

@@ -879,10 +879,16 @@ export const DOMEditor: DOMEditorInterface = {
 
       if (node && DOMEditor.hasDOMNode(editor, node, {editable: true})) {
         const slateNode = DOMEditor.toSlateNode(editor, node)
-        let {path, offset} = Editor.start(
-          editor,
-          DOMEditor.findPath(editor, slateNode),
-        )
+        let nodePath: Path
+        try {
+          nodePath = DOMEditor.findPath(editor, slateNode)
+        } catch (e) {
+          if (suppressThrow) {
+            return null as T extends true ? Point | null : Point
+          }
+          throw e
+        }
+        let {path, offset} = Editor.start(editor, nodePath)
 
         if (!node.querySelector('[data-slate-leaf]')) {
           offset = nearestOffset
@@ -905,7 +911,15 @@ export const DOMEditor: DOMEditorInterface = {
     // the select event fires twice, once for the old editor's `element`
     // first, and then afterwards for the correct `element`. (2017/03/03)
     const slateNode = DOMEditor.toSlateNode(editor, textNode!)
-    const path = DOMEditor.findPath(editor, slateNode)
+    let path: Path
+    try {
+      path = DOMEditor.findPath(editor, slateNode)
+    } catch (e) {
+      if (suppressThrow) {
+        return null as T extends true ? Point | null : Point
+      }
+      throw e
+    }
     return {path, offset} as T extends true ? Point | null : Point
   },