Stabilize patrol delete automation against delayed Amazon UI

The patrol-delete flow now waits for country and listing-status controls before acting, uses the dedicated PatrolDeleteTask entry point, and includes the browser helper scripts required by the bulk-delete path. Tests cover delayed dropdown readiness, payload rejection/retry behavior, complete-draft normalization, filtered bulk deletion, and asset fallback lookup.

Constraint: Amazon listing UI exposes status controls through dynamic KAT components and delayed option rendering

Rejected: Keep row-by-row delete flow | bulk selection is the current implemented path and is covered by the added helper scripts

Confidence: high

Scope-risk: moderate

Directive: Do not remove the patrol_delete JS helper files without checking app/amazon/patrol_delete.py script loading

Tested: uv run --group dev pytest tests\\test_amazon_base.py tests\\test_patrol_delete.py

Tested: uv run python -m py_compile amazon\\base.py amazon\\main.py blueprints\\main.py

Not-tested: Real Amazon Seller Central browser session

app/amazon/scripts/patrol_delete/inventory_select_all.js

@@ -0,0 +1,71 @@
+function isVisible(el) {
+  if (!el || !el.getBoundingClientRect) return false;
+  const rect = el.getBoundingClientRect();
+  const style = window.getComputedStyle(el);
+  return rect.width > 0 && rect.height > 0 && style.display !== 'none' && style.visibility !== 'hidden';
+}
+
+function walkRoots(root, rows, seen) {
+  if (!root || seen.has(root)) return;
+  seen.add(root);
+
+  const walker = document.createTreeWalker(root, NodeFilter.SHOW_ELEMENT);
+  let node = walker.currentNode;
+  while (node) {
+    if (node.nodeType === Node.ELEMENT_NODE && node.tagName) rows.push(node);
+    if (node.shadowRoot) walkRoots(node.shadowRoot, rows, seen);
+    node = walker.nextNode();
+  }
+}
+
+function allElements() {
+  const rows = [];
+  walkRoots(document, rows, new Set());
+  return rows;
+}
+
+function insideInventoryRow(el) {
+  return Boolean(el && el.closest && el.closest('div[data-sku]'));
+}
+
+function clickTargetFor(checkbox) {
+  if (!checkbox) return null;
+  if (checkbox.shadowRoot) {
+    const shadowTarget = checkbox.shadowRoot.querySelector('[role="checkbox"], .checkbox');
+    if (shadowTarget) return shadowTarget;
+  }
+  return checkbox;
+}
+
+const rowCount = document.querySelectorAll('div[data-sku]').length;
+if (rowCount <= 0) {
+  return { ok: false, reason: 'no inventory rows after status filter', rowCount };
+}
+
+const checkboxes = allElements()
+  .filter((el) => (el.tagName || '').toLowerCase() === 'kat-checkbox' && isVisible(el))
+  .sort((a, b) => {
+    const rectA = a.getBoundingClientRect();
+    const rectB = b.getBoundingClientRect();
+    return rectA.top - rectB.top || rectA.left - rectB.left;
+  });
+
+const headerCheckbox = checkboxes.find((el) => !insideInventoryRow(el)) || checkboxes[0];
+if (!headerCheckbox) {
+  return { ok: false, reason: 'select-all checkbox not found', rowCount, checkboxCount: checkboxes.length };
+}
+
+const target = clickTargetFor(headerCheckbox);
+target.scrollIntoView({ block: 'center', inline: 'nearest' });
+target.click();
+
+return {
+  ok: true,
+  rowCount,
+  checkboxCount: checkboxes.length,
+  clicked: {
+    tag: headerCheckbox.tagName,
+    insideInventoryRow: insideInventoryRow(headerCheckbox),
+    outerHTML: (headerCheckbox.outerHTML || '').slice(0, 1000),
+  },
+};