feat: improved formula rendering with new escaping functions

- Improved formula rendering by removing unnecessary escaping of dollar numbers.
- Implemented two new string escaping functions to prevent incorrect LaTeX formula rendering.

#101

src/renderer/src/pages/home/Markdown/Markdown.tsx

@@ -1,6 +1,7 @@
 import 'katex/dist/katex.min.css'
 
 import { Message } from '@renderer/types'
+import { escapeBrackets } from '@renderer/utils/formula'
 import { isEmpty } from 'lodash'
 import { FC, useMemo } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -31,7 +32,7 @@ const Markdown: FC<Props> = ({ message }) => {
     const empty = isEmpty(message.content)
     const paused = message.status === 'paused'
     const content = empty && paused ? t('message.chat.completion.paused') : message.content
-    return escapeBrackets(escapeDollarNumber(content))
+    return escapeBrackets(content)
   }, [message.content, message.status, t])
 
   return (
@@ -50,35 +51,4 @@ const Markdown: FC<Props> = ({ message }) => {
   )
 }
 
-function escapeDollarNumber(text: string) {
-  let escapedText = ''
-
-  for (let i = 0; i < text.length; i += 1) {
-    let char = text[i]
-    const nextChar = text[i + 1] || ' '
-
-    if (char === '$' && nextChar >= '0' && nextChar <= '9') {
-      char = '\\$'
-    }
-
-    escapedText += char
-  }
-
-  return escapedText
-}
-
-function escapeBrackets(text: string) {
-  const pattern = /(```[\s\S]*?```|`.*?`)|\\\[([\s\S]*?[^\\])\\\]|\\\((.*?)\\\)/g
-  return text.replace(pattern, (match, codeBlock, squareBracket, roundBracket) => {
-    if (codeBlock) {
-      return codeBlock
-    } else if (squareBracket) {
-      return `$$${squareBracket}$$`
-    } else if (roundBracket) {
-      return `$${roundBracket}$`
-    }
-    return match
-  })
-}
-
 export default Markdown

src/renderer/src/utils/formula.ts

@@ -0,0 +1,30 @@
+export function escapeDollarNumber(text: string) {
+  let escapedText = ''
+
+  for (let i = 0; i < text.length; i += 1) {
+    let char = text[i]
+    const nextChar = text[i + 1] || ' '
+
+    if (char === '$' && nextChar >= '0' && nextChar <= '9') {
+      char = '\\$'
+    }
+
+    escapedText += char
+  }
+
+  return escapedText
+}
+
+export function escapeBrackets(text: string) {
+  const pattern = /(```[\s\S]*?```|`.*?`)|\\\[([\s\S]*?[^\\])\\\]|\\\((.*?)\\\)/g
+  return text.replace(pattern, (match, codeBlock, squareBracket, roundBracket) => {
+    if (codeBlock) {
+      return codeBlock
+    } else if (squareBracket) {
+      return `$$${squareBracket}$$`
+    } else if (roundBracket) {
+      return `$${roundBracket}$`
+    }
+    return match
+  })
+}