fix(scripts): show cspell suggestions in filename lint annotations

cspell reports stdin entries with an empty file name, so the previous regex
never matched and no ::error annotations were emitted. Allow the empty file
name and include cspell's suggestions in the annotation message.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WWiYD36q9Zg9sRvGLHn4q3

scripts/lintFilenames.mts

@@ -3,12 +3,17 @@ import fs from 'fs';
 import process from 'process';
 import { spawn } from 'child_process';
 
-const regex = /(?<file>[^:]+):(?<line>\d+):(?<column>\d+)\s-\s+(?<message>.+)/;
+// cspell reports stdin entries without a file name, e.g.
+// `:1:7 - Unknown word (arow) Suggestions: [alow, arrow]`
+const regex =
+  /(?<file>[^:]*):(?<line>\d+):(?<column>\d+)\s-\s+(?<message>.+?)(?:\s+Suggestions:\s+\[(?<suggestions>[^\]]*)\])?$/;
 const fileList = process.env.CHANGED_FILES
   ? (process.env.CHANGED_FILES || '').split(' ')
   : fs.readdirSync('./icons').map((fileName) => path.join('./icons', fileName));
 
-const cspell = spawn('npx', ['cspell', 'stdin'], { stdio: ['pipe', 'pipe', 'inherit'] });
+const cspell = spawn('npx', ['cspell', 'stdin', '--show-suggestions'], {
+  stdio: ['pipe', 'pipe', 'inherit'],
+});
 cspell.stdin.write(fileList.join('\n'));
 cspell.stdin.end();
 
@@ -20,8 +25,11 @@ cspell.stdout.on('data', (data) => {
     .forEach((line: string) => {
       const match = line.match(regex);
       if (match) {
-        const { line, message } = match.groups ?? {};
-        console.log(`::error file=${fileList[Number(line) - 1]},line=1,column=1::${message}`);
+        const { line, message, suggestions } = match.groups ?? {};
+        const hint = suggestions ? ` Did you mean: ${suggestions}?` : '';
+        console.log(
+          `::error file=${fileList[Number(line) - 1]},line=1,column=1::${message}.${hint}`,
+        );
       }
     });
 });