Function issueRange

apps/vscode/src/diagnostics.ts:26–43

(
  issue: ValidationIssue,
  fm: ParsedFrontmatter
)

}

function issueRange(
  issue: ValidationIssue,
  fm: ParsedFrontmatter
): vscode.Range {
  const field = fm.fields.get(issue.field);

  if (!field) {
    // Missing field — highlight the closing `---` line
    return new vscode.Range(fm.endLine, 0, fm.endLine, 3);
  }

  if (issue.target === "key") {
    return toVscodeRange(field.keyRange);
  }

  // Default to value range for "value" and "block" targets when field exists
  return toVscodeRange(field.valueRange);
}

function toVscodeRange(range: {
  start: { line: number; col: number };