Wrap index SX response in #main-panel section

All nav links use sx-select="#main-panel" to extract content from
responses. The index partial must include this wrapper so the select
finds it, matching the pattern used by test-detail-section.

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

test/bp/dashboard/routes.py

@@ -26,12 +26,15 @@ def register(url_prefix: str = "/") -> Blueprint:
 
         if is_sx:
             from shared.sx.helpers import sx_response
-            html = await render_results_partial_sx(
+            inner = await render_results_partial_sx(
                 result, running, csrf,
                 active_filter=active_filter,
                 active_service=active_service,
             )
-            return sx_response(html)
+            # Wrap in #main-panel so sx-select="#main-panel" works
+            sx = (f'(section :id "main-panel" :class "flex-1 md:h-full md:min-h-0'
+                  f' overflow-y-auto overscroll-contain js-grid-viewport" {inner})')
+            return sx_response(sx)
 
         from shared.sx.page import get_template_context
         ctx = await get_template_context()