fix(ios): adjust bootom padding of body when keyboard toolbar existed (#11410)

Close [BS-2919](https://linear.app/affine-design/issue/BS-2919/【移动端】ios-页面底部点几，页面定位有问题，光标和浮层重叠，并且看不到新添加的-block)
Close [BS-2918](https://linear.app/affine-design/issue/BS-2918/【移动端】ios-添加标题无法展示对应-block，滑动页面也无效，光标位置也不对)

## Changes
- Fixed body padding calculation when keyboard toolbar is present
- Removed redundant position controller logic and simplified the implementation

blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/keyboard-tool-panel.ts

@@ -95,6 +95,6 @@ export class AffineKeyboardToolPanel extends SignalWatcher(
   @property({ attribute: false })
   accessor context!: KeyboardToolbarContext;
 
-  @property({ type: Number })
+  @property({ attribute: false })
   accessor height = 0;
 }

blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/keyboard-toolbar.ts

@@ -315,7 +315,7 @@ export class AffineKeyboardToolbar extends SignalWatcher(
       <affine-keyboard-tool-panel
         .config=${this._currentPanelConfig}
         .context=${this._context}
-        height=${this.panelHeight$.value}
+        .height=${this.panelHeight$.value}
       ></affine-keyboard-tool-panel>
     `;
   }

blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/position-controller.ts

@@ -4,8 +4,6 @@ import type { BlockStdScope, ShadowlessElement } from '@blocksuite/std';
 import { effect, type Signal } from '@preact/signals-core';
 import type { ReactiveController, ReactiveControllerHost } from 'lit';
 
-import { TOOLBAR_HEIGHT } from './styles';
-
 /**
  * This controller is used to control the keyboard toolbar position
  */
@@ -25,7 +23,7 @@ export class PositionController implements ReactiveController {
   }
 
   hostConnected() {
-    const { keyboard, panelOpened } = this.host;
+    const { keyboard } = this.host;
 
     this._disposables.add(
       effect(() => {
@@ -36,20 +34,6 @@ export class PositionController implements ReactiveController {
     );
 
     this.host.style.bottom = '0px';
-    this._disposables.add(
-      effect(() => {
-        if (keyboard.visible$.value) {
-          document.body.style.paddingBottom = `${keyboard.height$.value + TOOLBAR_HEIGHT}px`;
-        } else if (panelOpened) {
-          document.body.style.paddingBottom = `${this.host.panelHeight$.peek() + TOOLBAR_HEIGHT}px`;
-        } else {
-          document.body.style.paddingBottom = '';
-        }
-      })
-    );
-    this._disposables.add(() => {
-      document.body.style.paddingBottom = '';
-    });
   }
 
   hostDisconnected() {

blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/styles.ts

@@ -2,8 +2,6 @@ import { scrollbarStyle } from '@blocksuite/affine-shared/styles';
 import { unsafeCSSVarV2 } from '@blocksuite/affine-shared/theme';
 import { css } from 'lit';
 
-export const TOOLBAR_HEIGHT = 46;
-
 export const keyboardToolbarStyles = css`
   affine-keyboard-toolbar {
     position: fixed;
@@ -13,7 +11,7 @@ export const keyboardToolbarStyles = css`
 
   .keyboard-toolbar {
     width: 100%;
-    height: ${TOOLBAR_HEIGHT}px;
+    height: 46px;
     display: inline-flex;
     align-items: center;
     padding: 0px 8px;