* fix: include uncommitted changes in review dialog cumulative diff
The review dialog only showed uncommitted changes instead of the full
diff from the task's base commit. Two issues combined:
1. Backend used `git diff base..HEAD` (committed only); changed to
`git diff base` which compares against the working tree.
2. Frontend gave priority to git status over cumulative diff; reversed
the merge order so cumulative diff takes precedence.
Adds E2E test with a mock-agent scenario that commits changes then
leaves uncommitted modifications, verifying the review dialog shows
the complete base→working-tree diff.
* fix(e2e): remove incorrect BASE_CONTENT assertion in review cumulative diff test
The file is created after the base commit, so the entire file shows as
added in the cumulative diff. BASE_CONTENT was replaced and doesn't
appear. The key assertion is that COMMITTED_CHANGE is visible — proving
the diff includes committed changes (not just the uncommitted portion).
* fix: address CodeRabbit review feedback
- Update 3 docstrings to reflect working-tree diff (not HEAD)
- Generate scenario list dynamically in error message
- Use data-testid selector in E2E test for resilience
* style: format E2E test file
* fix(e2e): use toContainText and click file to ensure diff is scrollable
Pierre diff viewer content inside a scroll container may not be
considered "visible" by Playwright. Switch to toContainText which
checks text presence without element-level visibility. Also click
the file in the tree to ensure its diff section is scrolled into view.
Carlos Florêncio