Gabriel Vidal f52a7d41b9 feat(diff): real git diff of a conversation's live worktree ...

The conversation viewer's 'uncommitted changes' widget only ever saw work done
in a main checkout: the transcript-replay path (editsdiff) rejected every path
under ~/worktrees/<dir> and ~/projects/<slug>, so a conversation working in a
worktree — the normal case — showed nothing until its branch merged.

- backend/worktreediff.py: diff the worktree for real. A worktree's .git file
  points at a host path, so it maps the host repo root onto the mounted one
  (PROJECTS_DIR/<slug> or REPO_DIR) and drives git with an explicit
  --git-dir/--work-tree pair; returns 'git diff HEAD' plus untracked files,
  with a 1.5s TTL cache so an SSE ping costs one round of git calls.
- /api/conversation-uncommitted-diff prefers it, keeping only the replayed
  files that fall outside the worktree's repo; the replay stays the fallback
  once a worktree is torn down.
- editsdiff: normalise ~/worktrees/<dir>/… and ~/projects/<slug>/… onto the
  repo-relative paths each repo token's git commands use, and drop __pycache__
  and unexpanded-tilde noise.
- UI: the Changes row shows the branch, DiffView a branch chip; diff-blob
  serves image blobs from the worktree copy.

2026-08-09 23:11:24 +02:00

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