release: 0.66.0 — E5 Plex epic (scoped search, HU localization, toolbar/header)

Ships the E5 sprint stack (S1–S7): field-scoped Plex search + typeahead, cast &
crew pages, the HU-overlay Hungarian metadata + language-aware serving, the
IMDb/audience rating split, the toolbar relocation, and the narrow/mobile header
fix — plus the underlying Plex-module refactors (feedquery/plex.cards/plex.query
extraction, db.query→2.0 select).

- VERSION 0.65.2 → 0.66.0
- releaseNotes.ts: 0.66.0 user-facing entry
- prettier-format the E5-touched frontend files (release hygiene)

Merged main (0.65.2 download-gc hotfix) in first; no code conflicts (E5 is
Plex-only, the hotfix was notifications/downloads).

frontend/src/components/SearchBar.dom.test.tsx

@@ -15,9 +15,7 @@ vi.mock("react-i18next", async (importOriginal) => {
 
 describe("SearchBar responsive wrapper (E5 S7)", () => {
   it("carries the container-query classes that make it wrap instead of collapsing", () => {
-    const { container } = render(
-      <SearchBar value="" onChange={() => {}} placeholder="Search…" />,
-    );
+    const { container } = render(<SearchBar value="" onChange={() => {}} placeholder="Search…" />);
     const cls = (container.firstElementChild as HTMLElement).className;
     // A usable min-width floor once the column has room → the box wraps via flex-wrap, never ~0:
     expect(cls).toContain("@min-[420px]/appmain:min-w-[15rem]");