fix: sort glob results for deterministic load order across all callers

[kevinWangSheng]

Issue for this PR

Closes #14492

Type of change

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

What does this PR do?

Glob.scan and Glob.scanSync return results in filesystem readdir order, which varies across platforms and runs. This affects all callers — not just loadPlugin, but also loadAgent, loadMode, loadCommand (in config.ts), and custom tool loading (in tool/registry.ts).

This PR adds .sort() to both Glob.scan and Glob.scanSync in util/glob.ts, fixing the root cause at the utility level so all current and future callers get deterministic alphabetical order.

Also removes redundant .sort() calls in the existing glob tests — these were workarounds for the nondeterministic output and now serve as regression tests.

Note: This is an alternative to #14547, which only sorts in loadPlugin. This PR fixes the same issue at the source so all 5+ call sites benefit.

How did you verify your code works?

• Reviewed all call sites of Glob.scan/Glob.scanSync to confirm none depend on filesystem ordering
• Updated existing glob tests to assert sorted output directly (removed workaround .sort() in 6 test assertions)
• Array.prototype.sort() is stable and deterministic for string arrays

Screenshots / recordings

N/A — no UI changes.

Checklist

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

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Found Related PR:

PR #14547: fix(config): sort plugin paths for deterministic load order

Why it's related: This is the exact alternative approach mentioned in the PR description. PR #14626 fixes the root cause by adding .sort() to Glob.scan and Glob.scanSync at the utility level, while PR #14547 only sorts in loadPlugin. The description explicitly states this PR is "an alternative to #14547" — both address the same underlying issue (#14492) but at different levels. PR #14626's approach is more comprehensive since it fixes all 5+ call sites (loadPlugin, loadAgent, loadMode, loadCommand, and custom tool loading) rather than just the plugin loader.