phase: 156_table_ux_polish

Everything is verified. All gates green on the current working tree. Final report:

**Phase 156 — final verification pass (all 4 task files present in `complete/` — no outstanding work)**

- **Verified (not re-implemented):** bounded-panel `.table-wrap` (`max-height: min(70vh, 64rem)`, `overflow: auto`, opaque sticky `th` via `var(--brand-soft)`), `.cell-clip` ellipsis rule + the five label families in the three renderers, the added aria-labels, unit pins (incl. `.md-table-wrap` byte-unchanged scope guard, `#git-sources-table-wrap` harmony — no divergent rule), dedicated E2E suite (sticky ×3 tables, horizontal contract, computed-style ellipsis + reachable full text, mobile hamburger + scroll + pin)
- **Tests/lint/coverage:** `uv run pytest --cov=app --cov-report=term-missing` → **3570 passed, 99% on `app/`** (gate >90%); `uv run pytest tests/e2e/test_table_ux_polish.py -v --no-cov` (DB up) → **6/6 passed in isolation**; `uv run ruff check . && uv run pyright` → **clean** (0 errors)
- **Completion criteria:** sticky header all 3 tables (exact-0 offset while `scrollTop > 0`) ✅ · horizontal scroll unchanged ✅ · ellipsis computed style + actual clip + title/aria reachable ✅ · mobile ≤640px contract ✅ · full suite/E2E/lint/coverage ✅ · atomic commit: **harness commits this phase after the pass** (per pipeline protocol — no git history commands run by me)
- **Documentation:** AGENTS.md phase-156 wording (bounded panels, sticky headers, `.cell-clip` + aria-label idiom) matches the implementation exactly — verified consistent; README.md reviewed in full (pages/URLs vs registered routes, all `.env.example` vars documented, Quick Start, eval/llm scripts, compose prod profile, E2E examples) — verified consistent, no changes needed (README describes no table layout/scroll, so no phase-156 mention required)
- **Deviations:** none — all work was already in the working tree; this pass re-verified every gate and the docs
- **Next pending phase:** `157_chat_chip_cap`

tests/unit/test_remove_confirm_modal.py

@@ -238,6 +238,17 @@ def test_row_button_opens_the_modal_and_the_row_error_span_is_retired() -> None:
     js = _js()
     make = _fn(js, "makeRow")
     assert "openRemoveConfirm(s, btn)" in make, "the row's Remove opens the modal"
+    # Phase 156 (task 02, A3) audit: the Remove button's aria-label
+    # names the row's identity (the source's URL/path — the phase-89
+    # idiom), so a clipped label's full text stays reachable.
+    assert 'btn.setAttribute("aria-label", `Remove ${kindLabel} source: ${value}`)' in make
+    # The visible text is the .cell-clip span (a static template —
+    # the icon is static SVG, the established exception to the
+    # textContent house rule); a squeezed cell shows "…" instead of
+    # a hard cut.
+    assert "'<span class=\"cell-clip\">Remove</span>'" in make, (
+        "the clip label span (phase 156, A3)"
+    )
     assert "removeSource(" not in js, "the window.confirm-era flow is gone"
     assert "git-source-row-error" not in js
     assert "git-source-row-error" not in _css(), "the dead per-row error CSS is retired"