fix(editor): database behavier (#14394)

fix #13459
fix #13707
fix #13924

#### PR Dependency Tree


* **PR #14394** 👈

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**
* Improved URL paste: text is split into segments, inserted correctly,
and single-URL pastes create linked-page references.

* **UI Improvements**
  * Redesigned layout selector with compact dynamic options.
* Number-format options are always available in table headers and mobile
menus.

* **Bug Fixes**
  * More consistent paste behavior for mixed text+URL content.
  * Prevented recursive selection updates when exiting edit mode.

* **Tests**
* Added tests for URL splitting, paste insertion, number formatting, and
selection behavior.

* **Chores**
* Removed number-formatting feature flag; formatting now applied by
default.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/database/src/data-source.ts

@@ -135,14 +135,10 @@ export class DatabaseBlockDataSource extends DataSourceBase {
 
   override featureFlags$: ReadonlySignal<DatabaseFlags> = computed(() => {
     const featureFlagService = this.doc.get(FeatureFlagService);
-    const enableNumberFormat = featureFlagService.getFlag(
-      'enable_database_number_formatting'
-    );
     const enableTableVirtualScroll = featureFlagService.getFlag(
       'enable_table_virtual_scroll'
     );
     return {
-      enable_number_formatting: enableNumberFormat ?? false,
       enable_table_virtual_scroll: enableTableVirtualScroll ?? false,
     };
   });