chore(ios): disable dom renderer (#13462)

#### PR Dependency Tree


* **PR #13462** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated default configuration: The DOM-based renderer is now disabled
by default on all platforms. Previously, it was enabled by default on
iOS. This change standardizes the out-of-the-box experience across
devices. If you rely on the DOM renderer, you can still enable it via
feature flags in your environment or settings.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/feature-flag/constant.ts

@@ -227,7 +227,7 @@ export const AFFINE_FLAGS = {
     displayName: 'Enable DOM Renderer',
     description: 'Enable DOM renderer for graphics elements',
     configurable: true,
-    defaultState: isIOS,
+    defaultState: false,
   },
   enable_edgeless_scribbled_style: {
     category: 'blocksuite',