fix(tui): prevent orphan log panes and thread-unsafe reviews reads

[openlawbot]

Summary

• Fix orphan log panes: _poll_log popped keys from _log_panes before attempting DOM removal, wrapped in a bare try/except: pass. If removal threw, the widget stayed in the DOM as an invisible orphan — never reconciled, accumulating over time. This caused more log panels than active reviews (e.g. 4 panels with 2 reviews). Now the key is only deleted after successful removal, and on failure a full container rebuild clears all orphans.
• Thread-safe reviews snapshot: _poll_server now copies server.reviews once and passes the snapshot to _refresh_reviews_table, _update_title, and _poll_log, preventing the TUI thread from seeing inconsistent state when the server thread mutates the list between calls.
• Duplicate pane guard: Added keys_to_add.discard(key) in the pane creation loop so the same key can never produce two mounts in a single pass.

Test plan

• pytest tests/test_tui.py tests/test_tui_unit.py — 75 tests pass
• Manual: start gate with 2+ active reviews, let reviews complete, verify log panes shrink to match active count
• Manual: toggle log (L key) during review transitions, confirm no orphan panes accumulate

Made with Cursor

[openlawbot]

Gate (error) — review failed: Command 'gh' returned non-zero exit status 1.. Auto-approving.

[openlawbot]

Gate Review ✅

Approved with notes — The PR correctly fixes two related TUI bugs: orphan log panes accumulating due to premature _log_panes key deletion before DOM removal succeeded, and a race-prone server.reviews list read across a single _poll_server cycle. Build, lint (ruff), and all 1087 tests pass cleanly. One warning was identified: the new orphan-recovery exception handler uses logger.debug instead of logger.exception, silently discarding the traceback in violation of the project's error-handling standard. Additionally, the PR description inaccurately lists tests/test_tui.py and tests/test_tui_unit.py as updated — neither was changed in the diff — and the new recovery path has no regression test coverage.

Warnings

• gate/tui.py:1377 (pattern match) — Exception caught with logger.debug instead of logger.exception, silently discarding the traceback. The project standard (Section 3 — Error Handling) requires logger.exception(msg) when catching exceptions so that tracebacks are preserved in activity.log.

  Fix: Replace logger.debug("Failed to remove log pane %s, rebuilding", key) with logger.exception("Failed to remove log pane %s, rebuilding", key) so the full stack trace is captured whenever the orphan-recovery fallback fires.

Notes

• gate/tui.py:1325 — PR description lists tests/test_tui.py and tests/test_tui_unit.py as updated, but neither file appears in the diff. grep confirms zero tests touch _log_panes or _poll_log, so the deferred-deletion and nuke-and-rebuild recovery paths have no regression coverage.

Build Results

• ruff: ✅ (0 warnings)
• pytest: ✅ (1087/1093 passed)

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1 warning, 1 note across 6 stages (547s, confidence: high)

[openlawbot]

Gate Auto-Fix Applied

Fixed 1/1 findings in 1 iteration(s) (7898b40).

Fixed:

• gate/tui.py — Replaced logger.debug with logger.exception in the orphan log pane recovery handler so the full stack trace is captured in activity.log per Section 3 (Error Handling) of the Gate Cursor Rules.

[openlawbot]

Gate Review ✅

Approved — Re-review of fix/tui-orphan-log-panes. The single actionable prior warning (0168a408a5 — logger.debug swallowing tracebacks on log-pane removal failures) has been resolved by switching to logger.exception at tui.py:1377. All prior warning-level findings are now resolved; only one pre-existing info-level note about missing regression tests for the deferred-deletion path remains. Build is clean: 1087 tests pass, ruff lint passes, no type errors. Per the re-review graduation rule, with all prior warnings resolved and only info findings remaining, this PR must be approved.

Notes

• gate/tui.py:1325 — The deferred-deletion path (key removed only after successful DOM removal) and the nuke-and-rebuild recovery path have no dedicated regression tests. Neither tests/test_tui.py nor tests/test_tui_unit.py was updated despite being listed in the PR description.

Resolved since last review

• gate/tui.py — Exception caught with logger.debug instead of logger.exception at line 1377, silently discarding the traceback contrary to project error-handling standards. (fixed)

Build Results

• ruff: ✅ (0 warnings)
• pytest: ✅ (1087/1093 passed)

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1 note across 4 stages (194s, confidence: high)