fix(config): skip {file:} substitution only when no active lines match

[kevinWangSheng]

Issue for this PR

Closes #14478

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

load() in config.ts uses lines.findIndex() to locate {file:...} tokens for substitution. If the first line containing the token is a comment, continue skips substitution for that token entirely — even when the same token appears on a later non-comment line.

Moved the comment check into the findIndex predicate so it finds the first non-comment line with the token. If no non-comment line contains it, the token is correctly skipped.

Before:

const lineIndex = lines.findIndex((line) => line.includes(match))
if (lineIndex !== -1 && lines[lineIndex].trim().startsWith("//")) {
  continue
}

After:

const lineIndex = lines.findIndex((line) => line.includes(match) && !line.trim().startsWith("//"))
if (lineIndex === -1) continue

How did you verify your code works?

Tested with a jsonc config containing both a commented and active {file:...} token pointing to the same path. Before the fix the token stayed literal; after, it resolves correctly.

Screenshots / recordings

Not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR