refactor(editor): remove gfx tool global type (#12116)

Closes: BS-2650

blocksuite/affine/gfx/text/src/edgeless-text-editor.ts

@@ -1,5 +1,6 @@
 import {
   CanvasElementType,
+  DefaultTool,
   EdgelessCRUDIdentifier,
   getSurfaceBlock,
   type IModelCoord,
@@ -53,8 +54,7 @@ export function mountTextElementEditor(
 
   const gfx = edgeless.std.get(GfxControllerIdentifier);
 
-  // @ts-expect-error TODO: refactor gfx tool
-  gfx.tool.setTool('default');
+  gfx.tool.setTool(DefaultTool);
   gfx.selection.set({
     elements: [textElement.id],
     editing: true,