fix(catalog): keep the refine menu whole in short windows

The refine menu held 12 rows at 48px plus two section titles (657px).
Angular Material 22 sets no max-height on a menu panel, so below ~800px
the overlay was pushed up over its own Refine button, and at 600px the
last thresholds were clipped behind an invisible scrollbar.

The minimum-rating thresholds now open in a submenu from one row that
names the active threshold. The menu is about 390px and opens below its
button at 600px. The submenu trigger sits in a role="none" wrapper:
Material offsets a submenu by the first direct mat-menu-item's
offsetTop, and with the sort rows inside a role="group" that item was
the trigger itself, which opened the submenu 335px off screen.

The Electron E2E opens both menus by keyboard in a 600px-tall window
and checks that each lies whole on screen without scrolling.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.changes/catalog-refine-menu-short-windows.md

@@ -0,0 +1,6 @@
+---
+type: fix
+area: catalog
+---
+
+The Refine menu on Movies and Series now fits in a short window: the minimum-rating choices open in their own submenu, and the menu shows the active one.