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/PlexSearchBox.dom.test.tsx

@@ -19,7 +19,11 @@ vi.mock("react-i18next", async (importOriginal) => {
 vi.mock("../lib/useDebounced", () => ({ useDebounced: (v: unknown) => v }));
 
 // Controllable provider — PlexSearchBox reads q/scope/field and calls setQ/setField/setJumpTo.
-const plexState = { scope: "both", field: "all", q: "" } as { scope: string; field: string; q: string };
+const plexState = { scope: "both", field: "all", q: "" } as {
+  scope: string;
+  field: string;
+  q: string;
+};
 // setQ writes back to plexState.q so a typed value flows through to `dq` on the next render (the real
 // provider persists it) — lets the reopen test assert a fresh query fires on retype, not just that
 // the panel re-appears from cache.