The Browse-all grid silently inherited the global rail language preference, so users
couldn't ad-hoc browse foreign cinema without changing their homepage prefs. Added a
language chipset to the Browse panel (auto-wired via the generic chip handler -> state.sel.lang)
and the grid now always sends lang= : a real code filters, 'any' opts OUT of the rail
preference entirely. Route treats lang=any as 'no language filter'. Added a 'Browse the full
catalog' eyebrow so the panel reads as a self-contained search, parallel to 'Across Discover'.
Hide-owned and the saved 'My services' pref stay single/global by design (they apply page-wide);
the Browse panel's provider chips remain its own grid filter.
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