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_read_truncation_frontend.py

@@ -163,7 +163,7 @@ def test_restore_path_renders_the_stored_marker() -> None:
     assert fn != -1
     end = js.find("function restoreConversation")
     body = js[fn:end]
-    assert "appendToolLine(wrap, t.name, arg, tOffset, tLimit, tPath)" in body
+    assert "appendToolLine(restoreDisc, t.name, arg, tOffset, tLimit, tPath)" in body
     assert "t.truncated && arg" in body, (
         "only an argument-bearing (Reading) record with the flag renders"
         " the marker"
@@ -173,7 +173,7 @@ def test_restore_path_renders_the_stored_marker() -> None:
         " Number(t.chars_total) || 0)" in body
     )
     # The marker append sits INSIDE the tools loop, after the line append.
-    line_idx = body.find("appendToolLine(wrap, t.name, arg, tOffset, tLimit, tPath)")
+    line_idx = body.find("appendToolLine(restoreDisc, t.name, arg, tOffset, tLimit, tPath)")
     note_idx = body.find("appendTruncatedNote(wrap, arg,")
     assert -1 < line_idx < note_idx