fix(editor): textarea not focusing in AI panel (#11429)

Closes: [BS-3006](https://linear.app/affine-design/issue/BS-3006/insider上面，圈选yuan素后，ad-hoc的ai对话框焦点控制有大问题（无法对焦，总是会跳走）)

blocksuite/framework/std/src/inline/range/active.ts

@@ -1,3 +1,5 @@
+import { RANGE_SYNC_EXCLUDE_ATTR } from './consts';
+
 /**
  * Check if the active element is in the editor host.
  * TODO(@mirone): this is a trade-off, we need to use separate awareness store for every store to make sure the selection is isolated.
@@ -8,6 +10,9 @@
 export function isActiveInEditor(editorHost: HTMLElement) {
   const currentActiveElement = document.activeElement;
   if (!currentActiveElement) return false;
+  // The input or textarea in the widget should be ignored.
+  if (currentActiveElement.closest(`[${RANGE_SYNC_EXCLUDE_ATTR}="true"]`))
+    return false;
   const currentEditorHost = currentActiveElement?.closest('editor-host');
   if (!currentEditorHost) return false;
   return currentEditorHost === editorHost;

blocksuite/framework/std/src/inline/range/range-binding.ts

@@ -210,12 +210,11 @@ export class RangeBinding {
     const el = getElement(range.commonAncestorContainer);
     if (!el) return;
 
-    const closestExclude = el.closest(`[${RANGE_SYNC_EXCLUDE_ATTR}]`);
-    if (closestExclude?.getAttribute(RANGE_SYNC_EXCLUDE_ATTR) === 'true')
-      return;
+    const closestExclude = el.closest(`[${RANGE_SYNC_EXCLUDE_ATTR}="true"]`);
+    if (closestExclude) return;
 
-    const closestEditable = el.closest('[contenteditable]');
-    if (closestEditable?.getAttribute('contenteditable') === 'false') return;
+    const closestEditable = el.closest('[contenteditable="false"]');
+    if (closestEditable) return;
 
     const startElement = getElement(range.startContainer);
     const endElement = getElement(range.endContainer);