🐛 fix: Extra Backslash in Code Blocks ($0 -> /$0) (lobehub#177)

* Update utils.ts

* fix: Update escapeDollarNumber function to handle code blocks and single line code blocks

* Create utils.test.ts

* Update utils.test.ts

src/Markdown/utils.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+import { escapeDollarNumber } from './utils';
+
+describe('escapeDollarNumber', () => {
+  it('should escape dollar signs followed by numbers', () => {
+    expect(escapeDollarNumber('This costs $10.')).toBe('This costs \\$10.');
+    expect(escapeDollarNumber('I have $20 and you have $30')).toBe('I have \\$20 and you have \\$30');
+  });
+
+  it('should not escape dollar signs in code blocks', () => {
+    expect(escapeDollarNumber('```\n$10\n```')).toBe('```\n$10\n```');
+    expect(escapeDollarNumber('This is a inline code block: `$10`')).toBe('This is a inline code block: `$10`');
+  });
+
+  it('should handle multiple cases', () => {
+    expect(escapeDollarNumber('This costs $10. But this code is fine: `$10`.')).toBe('This costs \\$10. But this code is fine: `$10`.');
+  });
+
+  it('should handle edge cases', () => {
+    expect(escapeDollarNumber('')).toBe(''); 
+    expect(escapeDollarNumber('$')).toBe('$'); 
+    expect(escapeDollarNumber('$$')).toBe('$$'); 
+    expect(escapeDollarNumber('$1$2$3')).toBe('\\$1\\$2\\$3'); // 多个需要转义的情况
+  });
+});

src/Markdown/utils.ts

@@ -1,17 +1,40 @@
-export function escapeDollarNumber(text: string) {
+export function escapeDollarNumber(text: string): string {
   let escapedText = '';
-
-  for (let i = 0; i < text.length; i += 1) {
+  let inCodeBlock = false;
+  let inSingleLineCodeBlock = false;
+  let i = 0;
+  while (i < text.length) {
     let char = text[i];
-    const nextChar = text[i + 1] || ' ';
-
-    if (char === '$' && nextChar >= '0' && nextChar <= '9') {
+    if (char === '`') {
+      let tickCount = 1;
+      while (text[i + tickCount] === '`') {
+        tickCount++;
+      }
+      if (tickCount === 3) {
+        inCodeBlock = !inCodeBlock;
+        escapedText += '```';
+        i += tickCount;
+        continue;
+      } else if (tickCount === 1) {
+        inSingleLineCodeBlock = !inSingleLineCodeBlock;
+        escapedText += '`';
+        i += tickCount;
+        continue;
+      }
+    }
+    if (
+      !inCodeBlock &&
+      !inSingleLineCodeBlock &&
+      char === '$' &&
+      i + 1 < text.length &&
+      text[i + 1] >= '0' &&
+      text[i + 1] <= '9'
+    ) {
       char = '\\$';
     }
-
     escapedText += char;
+    i++;
   }
-
   return escapedText;
 }