[AZ-463] [AZ-469] [AZ-476] [AZ-477] Batch 6 - flight/responsive/upload/settings tests

- AZ-463 flight selection persistence (FT-P-16) + rehydration
  on boot (FT-P-17) PASS at the wire; 100-cycle leak guard
  (NFT-RES-LIM-07) and 1h SSE soak (NFT-RES-LIM-06)
  scaffolded as RUN_LONG_RUNNING-gated e2e companions.
- AZ-469 browser-support smoke (FT-P-34) runs in both
  Chromium and Firefox via the existing playwright config;
  responsive variants (FT-P-35 480px / FT-P-36 1024px) PASS
  in fast (Tailwind class shape) and e2e (visibility).
- AZ-476 upload 501 MB -> 413: AC-1 user-visible error is
  drift today (uploadFiles silently falls through to local
  mode); it.fails() + control + e2e test.fail. AC-2 no-alert
  PASS via dialog spy.
- AZ-477 settings save 500 / network drop: AC-1+AC-2+AC-3
  all drift today (no try/finally, no error region, deadline
  unmeasurable); 4 it.fails() + control pinning the stuck-
  disabled drift; e2e companions test.fail mirror it.
- LESSONS.md seeded: vi.stubGlobal('URL', {...URL,...})
  destroys the URL constructor and breaks new URL(...) in
  MSW; patch the methods directly instead.

Code review: PASS (0 findings). Fast: 22/22 files, 120
passed / 13 skipped. Static: 24/24 PASS.

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

_docs/_autodev_state.md

@@ -6,9 +6,9 @@ step: 6
 name: Implement Tests
 status: in_progress
 sub_step:
-  phase: 14
-  name: batch-loop
-  detail: "batch 5 complete; 10 tasks remain in todo/"
+  phase: 14.5
+  name: cumulative-review-due
+  detail: "batch 6 complete; cumulative 04-06 due"
 retry_count: 0
 cycle: 1
 tracker: jira
@@ -22,8 +22,9 @@ step_3_ac_gap_handling: rollback-to-6c (option A)
   `_docs/02_document/state.json`, `FINAL_report.md`, `architecture.md`,
   `glossary.md`, plus `_docs/01_solution/solution.md` and
   `_docs/00_problem/{problem,acceptance_criteria,restrictions,security_approach}.md`.
-- Implement-skill batch reports at `_docs/03_implementation/batch_0{1,2,3,4,5}_report.md`.
+- Implement-skill batch reports at
+  `_docs/03_implementation/batch_0{1,2,3,4,5,6}_report.md`.
 - Cumulative review (batches 01-03) PASS_WITH_WARNINGS at
   `_docs/03_implementation/cumulative_review_batches_01-03_report.md`.
-  Next cumulative review due after batch 6 (covers batches 04-06 per
-  `implement/SKILL.md` Step 14.5, K=3 cadence).
+  Next cumulative review (batches 04-06) due now per `implement/SKILL.md`
+  Step 14.5 (K=3 cadence).