fix(editor): markdown code preprocessor should handle link correctly (#11671)

Close [BS-3117](https://linear.app/affine-design/issue/BS-3117/代码粘贴后出现多余的-和-符号)

blocksuite/affine/all/src/__tests__/adapters/markdown.unit.spec.ts

@@ -4091,4 +4091,55 @@ hhh
     });
     expect(nanoidReplacement(rawBlockSnapshot)).toEqual(blockSnapshot);
   });
+
+  test('should not wrap url with angle brackets if it is not a url', async () => {
+    const markdown = 'prompt: How many people will live in the world in 2040?';
+    const sliceSnapshot: SliceSnapshot = {
+      type: 'slice',
+      content: [
+        {
+          type: 'block',
+          id: 'matchesReplaceMap[0]',
+          flavour: 'affine:note',
+          props: {
+            xywh: '[0,0,800,95]',
+            background: DefaultTheme.noteBackgrounColor,
+            index: 'a0',
+            hidden: false,
+            displayMode: NoteDisplayMode.DocAndEdgeless,
+          },
+          children: [
+            {
+              type: 'block',
+              id: 'matchesReplaceMap[1]',
+              flavour: 'affine:paragraph',
+              props: {
+                type: 'text',
+                text: {
+                  '$blocksuite:internal:text$': true,
+                  delta: [
+                    {
+                      insert:
+                        'prompt: How many people will live in the world in 2040?',
+                    },
+                  ],
+                },
+              },
+              children: [],
+            },
+          ],
+        },
+      ],
+      workspaceId: '',
+      pageId: '',
+    };
+
+    const mdAdapter = new MarkdownAdapter(createJob(), provider);
+    const rawSliceSnapshot = await mdAdapter.toSliceSnapshot({
+      file: markdown,
+      workspaceId: '',
+      pageId: '',
+    });
+    expect(nanoidReplacement(rawSliceSnapshot!)).toEqual(sliceSnapshot);
+  });
 });

blocksuite/affine/blocks/code/src/adapters/markdown/preprocessor.ts

@@ -2,6 +2,7 @@ import {
   type MarkdownAdapterPreprocessor,
   MarkdownPreprocessorExtension,
 } from '@blocksuite/affine-shared/adapters';
+import { isValidUrl } from '@blocksuite/affine-shared/utils';
 
 const codePreprocessor: MarkdownAdapterPreprocessor = {
   name: 'code',
@@ -53,14 +54,9 @@ const codePreprocessor: MarkdownAdapterPreprocessor = {
           //
           // eg. /MuawcBMT1Mzvoar09-_66?mode=page&blockIds=rL2_GXbtLU2SsJVfCSmh_
           // https://www.markdownguide.org/basic-syntax/#urls-and-email-addresses
-          try {
+          const valid = isValidUrl(trimmedLine);
-            const valid =
+          if (valid) {
-              URL.canParse?.(trimmedLine) ?? Boolean(new URL(trimmedLine));
+            return `<${trimmedLine}>`;
-            if (valid) {
-              return `<${trimmedLine}>`;
-            }
-          } catch (err) {
-            console.log(err);
           }
         }
 

tests/affine-local/e2e/blocksuite/clipboard/clipboard.spec.ts

@@ -375,4 +375,26 @@ test.describe('paste to code block', () => {
     // Verify the pasted code maintains indentation
     await verifyCodeBlockContent(page, 0, textWithHtmlTags);
   });
+
+  test('should not wrap line in brackets when pasting code', async ({
+    page,
+  }) => {
+    await pressEnter(page);
+    await addCodeBlock(page);
+    const plainTextCode = [
+      '  model: anthropic("claude-3-7-sonnet-20250219"),',
+      '  prompt: How many people will live in the world in 2040?',
+      '  providerOptions: {',
+      '    anthropic: {',
+      '      thinking: { type: enabled, budgetTokens: 12000 },',
+      '    } satisfies AnthropicProviderOptions,',
+      '  },',
+    ].join('\n');
+
+    await pasteContent(page, { 'text/plain': plainTextCode });
+    await page.waitForTimeout(100);
+
+    // Verify the pasted code maintains indentation
+    await verifyCodeBlockContent(page, 0, plainTextCode);
+  });
 });