fix(tests): update queue section display test to match redesigned dashboard

The dashboard redesign split the single "Processing Rates" section into
separate "Publish Rates (msg/s)" and "Ack Rates (msg/s)" panels, and
removed the #processing-rates-grid element. Update the E2E test to check
for the actual h2 headings and a known rate circle ID instead.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: SimplicityGuy

tests/dashboard/test_dashboard_ui.py

@@ -56,13 +56,16 @@ def test_queue_section_display(self, page: Page) -> None:
         queue_heading = page.locator("h2", has_text="Queue Size Metrics")
         expect(queue_heading).to_be_visible(timeout=10000)
 
-        # Processing rates section heading
-        rates_heading = page.locator("h2", has_text="Processing Rates")
-        expect(rates_heading).to_be_visible(timeout=10000)
+        # Processing rates section headings (split into publish and ack panels)
+        publish_rates_heading = page.locator("h2", has_text="Publish Rates")
+        expect(publish_rates_heading).to_be_visible(timeout=10000)
 
-        # SVG rate circles are rendered (8 total: 4 publish + 4 ack)
-        rate_grid = page.locator("#processing-rates-grid")
-        expect(rate_grid).to_be_visible(timeout=10000)
+        ack_rates_heading = page.locator("h2", has_text="Ack Rates")
+        expect(ack_rates_heading).to_be_visible(timeout=10000)
+
+        # SVG rate circles are rendered
+        rate_circle = page.locator("#rate-circle-graphinator-masters-publish")
+        expect(rate_circle).to_be_visible(timeout=10000)
 
     def test_database_cards_display(self, page: Page) -> None:
         """Test that database cards are displayed."""