[AZ-461] [AZ-464] [AZ-470] [AZ-472] Batch 5 - detection/bulk-validate/panel-width/classes tests

- AZ-461 sync image detect URL canary (FT-P-11) PASS;
  async-video QUARANTINE (FT-P-12) + X-Refresh-Token drift
  (FT-P-13) recorded as it.fails() with controls.
- AZ-464 bulk-validate URL + UI sync (≤2 s) PASS;
  body shape drift {annotationIds,status} vs contract
  {ids,targetStatus:30} captured as it.fails().
- AZ-470 panel-width debounce + rehydration: entire task
  is Phase-B target (useResizablePanel has no PUT writer
  / no rehydration); 3 ACs as it.fails() with controls.
- AZ-472 DetectionClasses load + click + fallback PASS;
  hotkey arithmetic P=0 PASS, P=20/P=40 it.fails() for
  classes[idx+P]-against-dense-array drift.

Code review: PASS (0 findings). Fast: 18/18 files,
102 passed / 13 skipped. Static: 21/21 PASS.

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

_docs/_autodev_state.md

@@ -8,7 +8,7 @@ status: in_progress
 sub_step:
   phase: 14
   name: batch-loop
-  detail: "batch 4 of ~5 complete; 14 tasks remain in todo/"
+  detail: "batch 5 complete; 10 tasks remain in todo/"
 retry_count: 0
 cycle: 1
 tracker: jira
@@ -22,8 +22,8 @@ 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}_report.md`.
+- Implement-skill batch reports at `_docs/03_implementation/batch_0{1,2,3,4,5}_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 (every 3 batches per
-  `implement/SKILL.md` Step 14.5).
+  Next cumulative review due after batch 6 (covers batches 04-06 per
+  `implement/SKILL.md` Step 14.5, K=3 cadence).