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/delete_success_messages.js

@@ -0,0 +1,46 @@
+function textOf(node) {
+  return ((node && (node.innerText || node.textContent || '')) || '').replace(/\s+/g, ' ').trim();
+}
+
+function attrsText(el) {
+  if (!el || !el.attributes) return '';
+  return Array.from(el.attributes).map((attr) => `${attr.name}=${attr.value}`).join(' ');
+}
+
+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);
+    if ((node.tagName || '').toLowerCase() === 'slot' && node.assignedElements) {
+      for (const assigned of node.assignedElements({ flatten: true })) {
+        walkRoots(assigned, rows, seen);
+      }
+    }
+    node = walker.nextNode();
+  }
+}
+
+const rows = [];
+walkRoots(document, rows, new Set());
+
+const seen = new Set();
+return rows
+  .filter((el) => {
+    const haystack = `${el.tagName || ''} ${attrsText(el)} ${textOf(el)}`;
+    return isVisible(el) && /kat-alert|alert|toast|notification|已删除|已经删除|15\s*分钟|success/i.test(haystack);
+  })
+  .map((el) => textOf(el) || attrsText(el))
+  .filter((text) => text && !seen.has(text) && seen.add(text))
+  .slice(0, 30);