feat(business): enhance block editor with segment conversion and data persistence

- Implement `segmentsToBlocks` utility to convert message segments into editable blocks.
- Update `BlockEditor` and `useBlockEditor` to support initial block loading and improved image upload handling.
- Add logic to `CreatePostScreen` to automatically switch to long-post mode when image segments are detected and preserve data when toggling modes.
- Update `AboutScreen` to make the ICP filing number clickable.
- Refactor mapper imports to use the updated data model paths.

src/components/business/BlockEditor/BlockEditor.tsx

@@ -3,12 +3,14 @@ import { View, ScrollView, StyleSheet } from 'react-native';
 
 import { useAppColors, spacing } from '../../../theme';
 import { MessageSegment } from '../../../types';
+import { EditorBlock } from './blockEditorTypes';
 import TextBlockInput from './TextBlockInput';
 import ImageBlockView from './ImageBlockView';
 import { useBlockEditor } from './useBlockEditor';
 
 export interface BlockEditorHandle {
   insertImage: () => Promise<void>;
+  insertCameraPhoto: () => Promise<void>;
   insertTextAtCursor: (text: string) => void;
   getSegments: () => MessageSegment[];
   getContent: () => string;
@@ -22,15 +24,17 @@ interface BlockEditorProps {
   style?: any;
   textStyle?: any;
   onContentChange?: (content: string) => void;
+  initialBlocks?: EditorBlock[];
 }
 
 const BlockEditor = React.forwardRef<BlockEditorHandle, BlockEditorProps>(
-  ({ placeholder = '添加正文', maxLength = 2000, style, textStyle, onContentChange }, ref) => {
+  ({ placeholder = '添加正文', maxLength = 2000, style, textStyle, onContentChange, initialBlocks }, ref) => {
     const colors = useAppColors();
-    const editor = useBlockEditor();
+    const editor = useBlockEditor(initialBlocks);
 
     useImperativeHandle(ref, () => ({
       insertImage: editor.insertImage,
+      insertCameraPhoto: editor.insertCameraPhoto,
       insertTextAtCursor: editor.insertTextAtCursor,
       getSegments: editor.getSegments,
       getContent: editor.getContent,