phase: 159_edit_and_resend_message

All completion criteria verified. Final report:

**Phase 159 — Edit the last question and re-ask it: VERIFIED COMPLETE** (all 4 tasks already in `complete/`; this pass verified end-to-end)

**Verified (implementation landed + tests green):**
- `app.js`: `EDIT_ICON`, `lastUserWrap`, `appendEditButton`/`markLastEditable` (single-target discipline, in-flight guard), `openEditor` (labelled textarea, `maxlength=4000`, Escape/Ctrl+⌘+Enter, empty guard), save path: replace → splice tail → DOM removal → `lastBrainWrap=null` → `saveConversation`+`persistConversation` → `runTurn(text,{reask:true})` — matches README exactly
- `styles.css`: `.edit-btn`/`.edit-form`/`.edit-error`/`.is-editing` + mobile 44px; unit pins 40, E2E 7, integration `test_chats_api.py` extended

**Test/lint results (all green):**
- `uv run pytest` — 3,661 tests, exit 0
- `uv run pytest --cov=app --cov-report=term-missing` — TOTAL **99%** (>90%)
- `uv run ruff check . && uv run pyright` — all checks passed; 0 errors
- `uv run pytest tests/e2e/test_edit_and_resend.py -v --no-cov` (DB up) — **7/7 passed**
- Regressions in isolation: `test_retry_answer.py` 4/4, `test_failed_turn_retry.py` 4/4, `test_chat_persistence.py` 4/4

**Completion criteria:** all 7 ✓ — Edit on last bubble + prefill + Escape/Cancel restore (E2E #3); replace+truncate+re-ask with no duplicated question (E2E #1); refresh survival (E2E #4); failed/“question too long” turn editable + trim re-asks (E2E #5); earlier bubbles un-editable + byte-identical Retry/Stop/persistence (E2E #2 + regressions + unit pins); suite/coverage/lint ✓; E2E + regressions isolated ✓. Commit + phase-dir move: harness's job (no git ops by me, per protocol).

**Documentation:** README.md — full review; phase 159 section cross-checked against `app.js` source (cap, keys, truncate, image survival) — consistent, no changes needed; all 30 `.env.example` vars documented. AGENTS.md — full review; all rules/quick-ref commands valid — verified consistent, no changes needed.

**Notable:** none — no defects found in prior work; no live-infrastructure changes required.

**Next pending phase:** `160_tool_budget_telemetry`

tests/unit/test_frontend_actions_cluster.py

@@ -365,10 +365,13 @@ def test_stop_finalize_appends_actions_last() -> None:
 
 def test_failed_funnel_note_and_retry_join_the_actions_row() -> None:
     """The phase-120 failure funnel (finalizeFailedTurn): the Failed
-    note is appended and the funnel ENDS with markLastRetryable — the
-    note + Retry in the failed bubble's actions row (the partial
+    note is appended and the funnel ENDS with markLastRetryable
+    immediately followed by markLastEditable (phase 159 task 01 —
+    the failed turn's question is editable too) — the note + Retry
+    + Edit in the failed bubble's actions row (the partial
     keeps its streamed text; the zero-frame shape gets a plain
-    FAILED_TURN_TEXT bubble). Both shapes end retryable."""
+    FAILED_TURN_TEXT bubble). Both shapes end retryable +
+    editable."""
     js = _js()
     header = (
         "function finalizeFailedTurn(\n"
@@ -382,10 +385,13 @@ def test_failed_funnel_note_and_retry_join_the_actions_row() -> None:
     )
     lines = [line for line in body.splitlines() if line.strip()]
     assert lines[-1].strip() == "}" and lines[-2].strip().startswith(
+        "markLastEditable();"
+    ) and lines[-3].strip().startswith(
         "markLastRetryable();"
     ), (
-        "the funnel still ends with the markLastRetryable() call — the "
-        "Retry button lands on the failed bubble's actions row"
+        "the funnel ends with the markLastRetryable() + "
+        "markLastEditable() pair — the Retry + Edit buttons land on "
+        "the failed bubble's actions row"
     )