refactor(header): remove the ModuleName module-switcher pill

The user no longer wants the header's "FEED" pill (module label + accent dot + ◀/▶ module-step
arrows). Drop it everywhere — the header now starts with the module's SearchBar; module switching
stays on the nav rail.

Deletes ModuleName.tsx, the now-unused stepModule() in lib/modules, and the Header's
module-order/label/setPage plumbing that only fed it.

frontend/src/components/Header.tsx

@@ -2,20 +2,17 @@ import { forwardRef, type ReactNode } from "react";
 import { useTranslation } from "react-i18next";
 import { Youtube } from "lucide-react";
 import type { Me } from "../lib/api";
-import { moduleLabelKey, moduleOrder, stepModule } from "../lib/modules";
-import ModuleName from "./ModuleName";
 import SearchBar from "./SearchBar";
 import PlexSearchBox from "./PlexSearchBox";
 import PlexScopeToggle from "./PlexScopeToggle";
 import SyncStatus from "./SyncStatus";
-import { useNavigation, useNavigationActions } from "./NavigationProvider";
+import { useNavigation } from "./NavigationProvider";
 import { useFeedFilters, useFeedFiltersActions } from "./FeedFiltersProvider";
 import { usePlaylists, usePlaylistsActions } from "./PlaylistsProvider";
 import { useChannels, useChannelsActions } from "./ChannelsProvider";
 
-// The floating top header: a row of glass pills over the content — a ModuleName pill (label +
-// accent dot + back/forward arrows), the module's SearchBar where it has one, and the per-user
-// sync chip at the right end.
+// The floating top header: a row of glass pills over the content — the module's SearchBar where it
+// has one, and the per-user sync chip at the right end.
 // `forwardRef` so PageShell can attach a ref to the header's root box and measure its real (possibly
 // wrapped) height — that measurement + the `--hdr-h` content pad it drives live in PageShell, which
 // owns both the header slot and the padded content wrapper (E5 S7).
@@ -30,7 +27,6 @@ const Header = forwardRef<
 >(function Header({ me, onYtSearch }, ref) {
   const { t } = useTranslation();
   const { page } = useNavigation();
-  const { setPage } = useNavigationActions();
   const filters = useFeedFilters();
   const { setFilters } = useFeedFiltersActions();
   // Each module's search term lives in its own provider (shared with that module's rail/content):
@@ -40,12 +36,6 @@ const Header = forwardRef<
   const { setSearch: setPlaylistsSearch } = usePlaylistsActions();
   const { search: channelsSearch } = useChannels();
   const { setSearch: setChannelsSearch, goToFullHistory: onGoToFullHistory } = useChannelsActions();
-  // The ◀/▶ arrows step cyclically through the user's available modules (derived from `me`, so
-  // it stays correct as modules are added/gated). Labels of every active module feed ModuleName's
-  // dynamic width so the pill is sized to the widest reachable title in the current language.
-  const order = moduleOrder(me);
-  const moduleLabels = order.map((p) => t(moduleLabelKey[p]));
-  const multiModule = order.length > 1;
   // Drop input focus on Go/Enter for the live-filter modules (feed's Go escalates to YouTube).
   const blur = () => (document.activeElement as HTMLElement | null)?.blur?.();
 
@@ -101,14 +91,6 @@ const Header = forwardRef<
       ref={ref}
       className="pointer-events-none absolute top-3 left-3 right-[10%] z-chrome flex flex-wrap items-center gap-x-3 gap-y-2"
     >
-      <ModuleName
-        label={t(moduleLabelKey[page])}
-        labels={moduleLabels}
-        onPrev={() => setPage(stepModule(me, page, -1))}
-        onNext={() => setPage(stepModule(me, page, 1))}
-        canPrev={multiModule}
-        canNext={multiModule}
-      />
       {search}
       {/* Library scope (movie/show/both) sits right of the search box on Plex — relocated here from
           the filter sidebar (S3) so the primary "what am I browsing" control is always in reach. */}