fix(desktop): detect linux arm64 binary

[ethernet8023]

What does this PR do?

The desktop binary detection in hermes_cli/main.py only looks for linux-unpacked/hermes (and the Hermes variant), which is the x86_64 build. On ARM64 Linux systems, the unpacked directory is named linux-arm64-unpacked instead, so the desktop app fails to find its own binary.

This PR adds linux-arm64-unpacked candidate paths to the lookup list so the desktop launch works on ARM64 Linux.

Related Issue

Fixes #

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 🔒 Security fix
• 📝 Documentation update
• ✅ Tests (adding or improving test coverage)
• ♻️ Refactor (no behavior change)
• 🎯 New skill (bundled or hub)

Changes Made

• hermes_cli/main.py: Added linux-arm64-unpacked/hermes and linux-arm64-unpacked/Hermes to the candidates list in the desktop binary detection logic

How to Test

1. Build or download a Hermes desktop release for linux-arm64
2. Run hermes on an ARM64 Linux machine — previously it would fail to locate the binary; after this change it finds it in linux-arm64-unpacked/
3. Verify x86_64 desktop still works (existing linux-unpacked candidates remain first in the list)

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (fix(scope):, feat(scope):, etc.)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass
• I've added tests for my changes (required for bug fixes, strongly encouraged for features)
• I've tested on my platform: Linux ARM64

Documentation & Housekeeping

• N/A — I've updated relevant documentation (README, docs/, docstrings)
• N/A — I've updated cli-config.yaml.example if I added/changed config keys
• N/A — I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows
• I've considered cross-platform impact (Windows, macOS) per the compatibility guide — change is Linux-specific, no impact on other platforms
• N/A — I've updated tool descriptions/schemas if I changed tool behavior

Screenshots / Logs

N/A

[github-actions]

🔎 Lint report: ethie/arm64-fix vs origin/main

ruff

Total: 0 on HEAD, 0 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 0 pre-existing issues carried over.

ty (type checker)

Total: 9780 on HEAD, 9780 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 5072 pre-existing issues carried over.

Diagnostics are surfaced as warnings — this check never fails the build.