feat: group dashboard projects by git remote with workspaces under each

[antonbabenko]

What

The dashboard groups runs by the git remote (org/repo) and lists each checkout as a workspace under it. Before, a separate clone or a checkout in /tmp showed up as its own project named after its folder, and there was no way to look at one workspace.

• core/project.js reads the origin remote (else the first remote) from the main git dir's config. It reads files only and never runs git.
  • name is org/repo and id hashes host plus path.
  • A new ws field hashes the checkout path.
  • Only the parsed org/repo is stored, never the URL, because https remotes can carry tokens.
  • Repos without a usable remote keep their old id.
• Runs recorded before ws existed are regrouped when the dashboard reads them, as long as their root still exists. The journal is not rewritten.
• ?project= now matches every workspace of a repo. The new ?ws= matches one workspace and wins over ?project=. Both work on /api/runs and /api/analyzer.
• UI:
  • The project dropdown is a tree (repo, then its workspaces) and is shared by the Runs and Analyzer tabs. A selection saved before this change maps to its repo.
  • The Runs column shows org/repo (path).
  • The Analyzer Projects table has expandable workspace rows, and clicking a name filters to it.
• Docs updated: README, TECHNICAL, SETUP, tool-guide, design-decisions, and the regenerated host files.

Testing

• npm run check (typecheck and 1192 tests) and npm run sync:check pass.
• New tests cover remote URL parsing, grouping of clones and worktrees, falling back when there is no remote, regrouping older runs, the ws filter, nested Analyzer numbers, the ?ws= 400 response, and the dropdown tree.
• Checked by hand against a real journal of 379 runs: the worktrees of one repo merged under its org/repo row.

Not done

• The pre-PR consensus review from AGENTS.md has not been run yet.
• The Stats tab still has no project filter, because it reads the debug log, which records no project.

[github-actions]

This PR is included in v3.28.0 🎉

Claude Code

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