feat(git-status): click a file in the Git panel to see its diff

Rows open an in-panel diff (staged, not staged, untracked as additions, deleted as removals) via GET /api/sessions/:id/git-diff, with Back and Open file. The route matches repo and path against the current status, runs git diff read-only (--no-ext-diff --no-textconv), and caps output at 400 KB.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JrzFKEdBLwVfu6ev2ZscJS
This commit is contained in:
Devvyn
2026-10-05 09:14:07 +08:00
co-authored by Claude Sonnet 5.5
parent bfc164a262
commit cd9218c23e
8 changed files with 402 additions and 13 deletions
+2
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@@ -704,6 +704,8 @@ normal `caseName`/`mode`/etc. body)
`GET /api/sessions/:id/git-status` is what the bottom-bar Git indicator and its panel read (Settings → Header & Panels → Bottom bar, per-device, default off). It reports what the session's workspace has not committed or pushed. **Read-only and offline:** it never fetches, pulls, commits or writes (it runs `git status` with `--no-optional-locks`, so it does not even refresh the index), which is why `behind` is as of the last `git fetch`. The session is resolved like every session route (ownership via `findSessionOrFail`; another user's session is `404`).
`GET /api/sessions/:id/git-diff?repo=<repoRoot>&path=<path>&kind=staged|unstaged|untracked|conflicted` returns the unified diff of one file the panel lists (`{ diff, truncated, binary }`; staged is index vs HEAD, unstaged is working tree vs index, untracked is the whole file as additions). It is what opens when you click a file in the Git panel. `repo` and `path` are matched against the current status rather than trusted, so anything the status does not list is `404`. Read-only (`--no-ext-diff --no-textconv`, so repository config never runs a program), capped at 400 KB, and refused (`400`) for remote and Docker sessions.
**Which repositories.** git finds a repository by walking *up* from the session's working directory, so:
- Inside a repository (or at its root): that one repository, whole (a subfolder reports its enclosing repo, `path` says where it is, e.g. `../..`). A nested repo below it is just an untracked folder to the outer one and is not scanned; start the session inside it to see it.