[docs] Fix pathname collision in LLMs docs generator

When multiple markdown files exist in the same directory, findPagesMarkdown()
strips filenames causing pathname collisions. This resulted in the wrong file
content being used (e.g., upgrade-to-v7.md incorrectly contained content from
upgrade-to-native-color.md).

Fix by matching files based on filename basename + parent path verification
instead of relying solely on the stripped pathname.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: siriwatknp

scripts/buildLlmsDocs/index.ts

@@ -264,7 +264,14 @@ function findNonComponentMarkdownFiles(
       pathname.startsWith('/material-ui/') &&
       !ignoredPaths.some((ignored) => pathname.startsWith(ignored))
     ) {
-      const page = allMarkdownFiles.find((p) => p.pathname === parsedPathname);
+      // Match by filename basename to avoid pathname collisions when multiple files
+      // exist in the same directory (e.g., upgrade-to-v7.md and upgrade-to-native-color.md)
+      const lastSegment = pathname.split('/').filter(Boolean).pop();
+      const page = allMarkdownFiles.find((p) => {
+        const fileBasename = path.basename(p.filename, '.md');
+        const parentPath = parsedPathname.replace(/\/[^/]+$/, '');
+        return fileBasename === lastSegment && p.filename.includes(parentPath);
+      });
 
       if (page) {
         files.push({