fix: load dashboard when only non-VS Code harness logs exist (Claude/Codex/OpenCode)

[bryantharpe]

The dashboard's load gate aborts with "No Copilot chat log directories found" when findLogsDirs() is empty, but that only scans VS Code workspace storage and Copilot paths. The Claude Code / Codex / OpenCode collectors run in the parse worker independently of that list, so a host with only ~/.claude/projects (e.g. a headless Remote-SSH machine, Claude Code used from the terminal, no VS Code workspace storage) never loads despite valid sessions.

Adds hasExternalHarnessSources(), gates on it so the panel aborts only when no source of any kind is present, and updates the Copilot-specific empty-state message to reflect all supported sources. Validated against 133 real Claude Code sessions discovered with zero VS Code directories present.

Fixes #52

Checklist

• npm run check passes (typecheck + lint + spellcheck + knip + tests)
• Changes are covered by tests (new parser-harnesses.test.ts)
• Documentation updated (n/a)

[bryantharpe]

@microsoft-github-policy-service agree

[Copilot]

Pull request overview

Fixes the dashboard load gate so the webview can still load and parse sessions when only non–VS Code harness logs (Claude Code / Codex / OpenCode) exist on disk (e.g., headless Remote-SSH hosts), instead of aborting early with a Copilot-only “no dirs found” message.

Changes:

• Add hasExternalHarnessSources() to detect external-harness log sources on disk.
• Update the dashboard’s load gate to abort only when no supported source exists (VS Code/Xcode/Copilot paths and external harnesses).
• Add a new Vitest file to cover the external-harness source discovery used by the gate.

Show a summary per file

File	Description
src/webview/panel.ts	Uses hasExternalHarnessSources() to avoid aborting when findLogsDirs() is empty but external harness logs exist; updates empty-state message.
src/core/parser-harnesses.ts	Adds hasExternalHarnessSources() helper to detect Claude/Codex/OpenCode sources on disk.
src/core/parser-harnesses.test.ts	Adds tests validating the external-harness source discovery used by the dashboard gate.

Copilot's findings

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• Files reviewed: 3/3 changed files
• Comments generated: 3

[bryantharpe]

Thanks for the review! Addressed all three points in 8651ff5:

1. panel.ts empty-state message — now reads "VS Code, GitHub Copilot (CLI and Xcode), Claude Code, Codex, and OpenCode" so Xcode-only hosts aren't misled (findLogsDirs() includes findXcodeDirs()).
2. hasExternalHarnessSources() — guards on a defined home dir; returns false when neither HOME nor USERPROFILE is set, so the find*Dirs() helpers never probe cwd-relative paths like .claude/projects.
3. Test helper — withHome() now saves/restores HOME/USERPROFILE in its own finally (dropped the afterEach), and I added a test asserting the no-home guard returns false.

npm run check passes (998 tests).