[AZ-455] Step 6 close: implementation_report_tests.md + advance to Step 7

Final test-implementation report with handoff to test-run
skill per implement skill Step 16 (next flow step is Run
Tests; let test-run own the full-suite gate to avoid
duplicate runs).

27 test tasks delivered across 8 batches (1 + 4*6 + 4 + 2);
0 production source mutations; 26/26 ACs covered; 23
production drifts pinned to runnable contract tests; 29
commit-time static gates active (up from 13 at baseline).

State: existing-code Step 7 (Run Tests), not_started.

Co-authored-by: Cursor <cursoragent@cursor.com>

_docs/03_implementation/cumulative_review_batches_07-08_cycle1_report.md

@@ -190,7 +190,7 @@ Reason: 0 Critical / 0 High; 1 Low / Maintainability finding new (F-CUM-5: 7 new
 
 Phase A — One-time baseline setup is now COMPLETE.
 
-- 25 Phase A test tasks delivered across 8 batches.
+- 27 Phase A test tasks delivered across 8 batches (AZ-456 + AZ-457..AZ-482 minus the 7 testability-refactor tasks AZ-448..AZ-454, which run under their own report).
 - 0 production source files mutated (Blackbox Tests envelope respected end-to-end).
 - All 26 ACs in batches 7–8 covered; cumulative 100% AC coverage across all 8 batches (per the per-batch reports).
 - 23 production drifts catalogued and pinned to runnable contract tests; each test flips green automatically when the matching production fix lands.

_docs/03_implementation/implementation_report_tests.md

@@ -0,0 +1,63 @@
+# Test Implementation — Final Report
+
+**Cycle**: Phase A baseline (cycle 1)
+**Step**: existing-code Step 6 — Implement Tests
+**Date**: 2026-05-11
+**Final commit**: `c16c9d8` on `dev` (cumulative review batches 07–08); test-implementation tip: `f245194` (batch 8)
+
+## Scope
+
+This report covers **test implementation only**. The 7 testability-refactor tasks (AZ-448..AZ-454) ran under the refactor skill (Step 4) and have their own report in `_docs/04_refactoring/01-testability-refactoring/`.
+
+## Summary
+
+- **27 test tasks** delivered across **8 batches** (AZ-456 + AZ-457..AZ-482; 1 test-infrastructure + 26 blackbox-test tasks).
+- **0 production source files mutated** — the entire run stayed inside the `Blackbox Tests` envelope (`tests/**` + `e2e/**` + `src/**/*.test.{ts,tsx}` + selected static-check artefacts).
+- **All 26 task ACs covered** with a runnable test (every AC has either a PASS contract test, an `it.fails()` drift assertion paired with a control, or a quarantined skip with a documented flip condition).
+- **23 production drifts catalogued and pinned** to runnable contract tests; each test flips green automatically when the matching production fix lands. Drift backlog summarised in `_docs/03_implementation/cumulative_review_batches_07-08_cycle1_report.md` finding F-CUM-5.
+- **29 commit-time static gates active** (up from 13 at baseline `729ad1c`). New IDs: `STC-SEC1B`, `STC-SEC2`..`STC-SEC4`, `STC-SEC7`, `STC-SEC8`, `STC-SEC13`, `STC-SEC14`, `STC-FN15`, `STC-FP22`, `STC-FP23`, `STC-CI11`, `STC-PERF01`, `STC-RES02`, `STC-RES03`, `STC-RES09`, `STC-RES10`.
+
+## Per-Batch Outcomes
+
+| Batch | Date | Tasks | Pts | Code-review | Notes |
+|------:|------|-------|-----|-------------|-------|
+| 1 | 2026-05-11 | AZ-456 | 5 | PASS | MSW boundary + helpers + fixtures + setup |
+| 2 | 2026-05-11 | AZ-457, AZ-459, AZ-465, AZ-481 | 13 | PASS | Auth + enum wire contract + i18n + CI labels |
+| 3 | 2026-05-11 | AZ-458, AZ-467, AZ-468, AZ-482 | 13 | PASS | SSE lifecycle + RBAC + Header dropdown + secrets/banned |
+| 4 | 2026-05-11 | AZ-460, AZ-462, AZ-466, AZ-475 | 11 | PASS | Annotation save + overlay + ConfirmDialog + form hygiene |
+| 5 | 2026-05-11 | AZ-461, AZ-464, AZ-470, AZ-472 | 12 | PASS | Detect + bulk-validate + panel-width + class hotkeys |
+| 6 | 2026-05-11 | AZ-463, AZ-469, AZ-476, AZ-477 | 12 | PASS | Flight persistence + browser-support + 413 + settings resilience |
+| 7 | 2026-05-11 | AZ-471, AZ-473, AZ-478, AZ-479 | 13 | PASS | Canvas editor + photo mode + network resilience + bundle/FCP/soak |
+| 8 | 2026-05-11 | AZ-474, AZ-480 | 6 | PASS | Tile-split + prod nginx/image (Phase A close) |
+
+**Total**: 85 pts across 27 tasks. Cumulative reviews at K=3 cadence:
+- `cumulative_review_batches_01-03_report.md` (PASS_WITH_WARNINGS — F-CUM-1, F-CUM-2)
+- `cumulative_review_batches_04-06_cycle1_report.md` (PASS_WITH_WARNINGS — F-CUM-3, F-CUM-4)
+- `cumulative_review_batches_07-08_cycle1_report.md` (PASS_WITH_WARNINGS — F-CUM-5, F-CUM-4 carry-over; cycle close)
+
+## Final Test-Suite Status (handoff to Step 7)
+
+The implement skill's Step 16 (Final Test Run) is **handed off** to `.cursor/skills/test-run/SKILL.md` per the implement skill's Step 16 rule:
+
+> If the next flow step is `Run Tests`, record a handoff in the final implementation report and let `test-run/SKILL.md` own the full-suite gate to avoid duplicate full runs.
+
+The next autodev step is Step 7 (Run Tests), so the full-suite gate is delegated.
+
+For visibility (most recent batch-end run, host machine, batch-8 close):
+
+- `bun run test:fast` — 26 files / 163 PASS / 13 SKIP / ~16.4 s wall.
+- `./scripts/run-tests.sh --static-only` — 29 / 29 PASS / ~13 s wall.
+- `bun run e2e` — not yet run end-to-end since batch 7's introduction of the suite-e2e perf lane and batch 8's docker-host probes; this is exactly the work test-run skill picks up at Step 7.
+
+## Open Items Carried into Step 7
+
+- F-CUM-5 production-drift backlog (23 entries) — non-blocking; routed to Phase B / Step 9 (New Task) per `cumulative_review_batches_07-08_cycle1_report.md`.
+- F-CUM-4 long-running soak gating mechanism (still env-flag-only; spec calls for `@long-running` Playwright config grep filter) — non-blocking; should be folded into the test-run skill's Step 1–4 lane configuration if it surfaces a CI-lane question.
+
+## Tracker Status
+
+All 27 test tickets transitioned to **In Testing** in Jira (project `AZ`). Per the autodev tracker rule, transitioning to **Done** is owned by Step 7 (Run Tests) once the full-suite gate confirms each ticket's contract holds end-to-end.
+
+## Step 6 Closure
+
+Step 6 is **complete**. Auto-chain to Step 7 (Run Tests) per the existing-code flow.