phase: 158_thinking_timeline

All verification complete. Every gate is green and the docs check out. Final report:

## Phase 158 final verification pass — COMPLETE

**Verified (all tasks pre-completed; this pass re-ran the full gate):**
- Unit + integration: `uv run pytest --cov=app --cov-report=term-missing` → **3618 passed, 99% coverage on `app/`** (>90% gate)
- Phase E2E in isolation: `uv run pytest tests/e2e/test_thinking_timeline.py -v --no-cov` → **6/6 passed** (order pin, fold-at-rest, live-open, restore+`segments` array, shared page, no-thinking single disclosure)
- Regression E2E, each in isolation: `test_thinking_display` 5✓, `test_tool_call_compact` 4✓, `test_turn_progress_loader` 3✓ (per-run pin updated), `test_big_read_progress` 4✓, `test_agent_document_tools` 4✓, `test_share_chat` 4✓, `test_chat_persistence` 4✓, `test_smoke` 3✓
- Lint/types: `uv run ruff check . && uv run pyright` → **clean (0 errors)**

**Completion criteria:** all 9 met — timeline E2E pins ✓, restore/shared `segments` ✓, no-thinking single-disclosure + the three UNCHANGED regression suites green ✓, pre-phase byte-identical round-trip (integration pin: key absent, never null; >50 / >32 000 / empty text / unknown kind all 422) ✓, full suite + coverage + E2E + lint ✓, `git diff --stat` footprint limited to `app/schemas.py`, `frontend/assets/{app,shared}.js`, `tests/`, README, phase files (a pre-existing owner `TODO.md` edit is out of scope, not staged by the phase commit) ✓, D15→per-run supersession recorded in the updated pin ✓. (Commit + phase move are the harness's job; task dirs already in `complete/`.)

**Documentation:** README.md — Thinking section correctly describes the phase-158 timeline; config reference matches `.env.example` exactly; page table matches registered routes; no stale single-block wording. AGENTS.md — rules and quick-reference commands all accurate. **Verified consistent — no changes needed.**

**Decisions/deviations:** none. `test_tool_call_compact.py` carries a one-line docstring-only update (referenced the removed `closeToolCalls`); its test logic is byte-identical to the phase-117 contract and green.

**Next pending phase:** none — `todo/` contains only 158.

tests/unit/test_frontend_failed_turn.py

@@ -163,10 +163,9 @@ def test_finalize_failed_turn_persists_failed_in_both_shapes() -> None:
     # …the zero-frame shape creates the FAILED_TURN_TEXT bubble…
     assert 'addMessage("brain", FAILED_TURN_TEXT);' in body
     assert "appendFailedNote(fwrap, error);" in body
-    # …and the partial shape settles the block + calls closed (the
-    # stop-finalize pattern) and adds the note.
-    assert "closeThinkingBlock(wrap);" in body
-    assert "closeToolCalls(wrap);" in body
+    # …and the partial shape settles every open run closed (phase 158,
+    # D5 — the stop-finalize pattern) and adds the note.
+    assert "closeAllRuns(wrap);" in body
     assert "appendFailedNote(wrap, error);" in body
     # Both shapes land the record through rememberBrainTurn (local
     # storage + the phase-55 auto-save ride) and set lastBrainWrap