chore(editor): mobile database editing experimental flag (#13425)

#### PR Dependency Tree


* **PR #13425** 👈

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

* **New Features**
* Introduced a feature flag to enable or disable mobile database
editing.
* Added user notifications on mobile when attempting to edit databases
if the feature is not enabled.

* **Bug Fixes**
* Prevented addition of filters and group actions in readonly or
restricted mobile editing states.
* Fixed issues with selection handling in mobile Kanban and Table views
by ensuring correct context binding.

* **Style**
  * Improved toast notification styling to allow dynamic height.
* Adjusted mobile table view styles for better compatibility on iOS
devices.

* **Chores**
* Updated feature flag configuration to support mobile database editing
control.

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

blocksuite/affine/shared/src/services/feature-flag-service.ts

@@ -15,6 +15,7 @@ export interface BlockSuiteFlags {
   enable_shape_shadow_blur: boolean;
   enable_mobile_keyboard_toolbar: boolean;
   enable_mobile_linked_doc_menu: boolean;
+  enable_mobile_database_editing: boolean;
   enable_block_meta: boolean;
   enable_callout: boolean;
   enable_edgeless_scribbled_style: boolean;
@@ -41,6 +42,7 @@ export class FeatureFlagService extends StoreExtension {
     enable_mobile_keyboard_toolbar: false,
     enable_mobile_linked_doc_menu: false,
     enable_block_meta: true,
+    enable_mobile_database_editing: false,
     enable_callout: false,
     enable_edgeless_scribbled_style: false,
     enable_table_virtual_scroll: false,