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/tests/test_amazon_base.py

@@ -302,6 +302,23 @@ def test_switching_countries_clicks_and_verifies_target(monkeypatch):
     assert target.clicks == 1
 
 
+def test_open_country_dropdown_waits_for_delayed_country_list(monkeypatch):
+    monkeypatch.setattr(base.time, "sleep", lambda seconds: None)
+    dropdown = FakeElement()
+    first_item = FakeElement()
+    driver = base.AmamzonBase({})
+    driver.tab = FakeTab(
+        ele_returns={
+            'xpath://div[@class="dropdown-account-switcher-header-label"]': [dropdown],
+            'xpath://div[@class="dropdown-account-switcher-list-item"]': [None, first_item],
+        }
+    )
+
+    assert driver._open_country_dropdown() is True
+    assert dropdown.clicks == 2
+    assert first_item.clicks == 1
+
+
 def test_login_returns_true_when_otp_submit_succeeds(monkeypatch):
     monkeypatch.setattr(base.time, "sleep", lambda seconds: None)
     password_input = FakeElement()