video discover: give the Browse panel its own language filter (self-contained search)

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.

api/video/discover.py

@@ -282,13 +282,19 @@ def register_routes(bp):
         if providers and "," in providers:
             providers = providers.replace(",", "|")   # TMDB with_watch_providers OR-join
         sort = request.args.get("sort") or "popularity.desc"
-        lang = (request.args.get("lang") or "").strip() or None       # explicit (foreign rail)
+        lang = (request.args.get("lang") or "").strip().lower() or None  # explicit (foreign rail / browse)
+        # The Browse-all grid sends `lang=any` to opt OUT of the rail language preference
+        # entirely (ad-hoc search shows every language); a real code (en/ko/…) filters to it.
+        any_lang = lang in ("any", "all")
+        if any_lang:
+            lang = None
         hide_owned = (request.args.get("hide_owned") or "") in ("1", "true", "yes")
         # Preferred original-languages (multi) for GENERAL/curated rails — so the feeds
         # aren't flooded with foreign titles (e.g. Bollywood in Popular/Trending). A rail
-        # with an explicit `lang` (a dedicated foreign rail) bypasses this. Default 'en'.
+        # with an explicit `lang` (a dedicated foreign rail) or `lang=any` (browse) bypasses
+        # this. Default 'en'.
         prefer_langs = None
-        if not lang:
+        if not lang and not any_lang:
             try:
                 from . import get_video_db
                 raw = get_video_db().get_setting("discover_languages", "en") or "en"

webui/index.html

@@ -1072,6 +1072,7 @@
                         </div>
 
                         <div class="vdsc-browse">
+                            <div class="vdsc-browse-label">Browse the full catalog</div>
                             <div class="vdsc-browse-top">
                                 <div class="vdsc-seg" data-vdsc-seg="kind" role="group" aria-label="Type">
                                     <button class="vdsc-seg-btn vdsc-seg-btn--on" type="button" data-val="movie">Movies</button>
@@ -1097,6 +1098,17 @@
                                 <button class="vdsc-chip" type="button" data-val="531" style="--c: 14, 116, 240;">Paramount+</button>
                                 <button class="vdsc-chip" type="button" data-val="386" style="--c: 147, 112, 219;">Peacock</button>
                             </div>
+                            <div class="vdsc-chips" data-vdsc-chipset="lang" aria-label="Language">
+                                <button class="vdsc-chip vdsc-chip--reset vdsc-chip--on" type="button" data-val="">Any language</button>
+                                <button class="vdsc-chip" type="button" data-val="en">English</button>
+                                <button class="vdsc-chip" type="button" data-val="ko">Korean</button>
+                                <button class="vdsc-chip" type="button" data-val="ja">Japanese</button>
+                                <button class="vdsc-chip" type="button" data-val="es">Spanish</button>
+                                <button class="vdsc-chip" type="button" data-val="fr">French</button>
+                                <button class="vdsc-chip" type="button" data-val="hi">Hindi</button>
+                                <button class="vdsc-chip" type="button" data-val="de">German</button>
+                                <button class="vdsc-chip" type="button" data-val="it">Italian</button>
+                            </div>
                             <div class="vdsc-browse-bottom">
                                 <div class="vdsc-chips vdsc-chips--era" data-vdsc-chipset="decade" aria-label="Decade">
                                     <button class="vdsc-chip vdsc-chip--reset vdsc-chip--on" type="button" data-val="">Any era</button>

webui/static/video/video-discover.js

@@ -23,7 +23,7 @@
         io: null,
         hero: { items: [], idx: 0, timer: null },
         cat: { title: '', q: '', page: 1, paginates: true, busy: false, hasMore: false },
-        sel: { kind: 'movie', genre: '', decade: '', providers: '', sort: 'popularity.desc' },   // Browse panel
+        sel: { kind: 'movie', genre: '', decade: '', providers: '', lang: '', sort: 'popularity.desc' },   // Browse panel
     };
     var AUTO = (typeof IntersectionObserver !== 'undefined');   // infinite-scroll capable
     var sentinelVisible = false;
@@ -587,6 +587,10 @@
         if (s.genre) { q.push('genre=' + s.genre); var gn = genreName(s.kind, s.genre); if (gn) bits.push(gn); }
         if (s.providers) { q.push('providers=' + s.providers); var pn = activeChipText('providers'); if (pn) bits.push('on ' + pn); }
         if (s.decade) { q.push('decade=' + s.decade); bits.push(s.decade + 's'); }
+        // Browse-all is a self-contained search: always send a language so it never silently
+        // inherits the rail language preference. 'any' = show every language; a code filters.
+        q.push('lang=' + (s.lang || 'any'));
+        if (s.lang) { var ln = activeChipText('lang'); if (ln) bits.push(ln); }
         openCategory(bits.join(' · '), q.join('&'));
     }
     function genreName(kind, id) {

webui/static/video/video-side.css

@@ -2372,6 +2372,8 @@ body[data-side="video"] #soulsync-toggle { display: none; }
     color: rgba(255, 255, 255, 0.32); margin-right: 2px; }
 .vdsc-global .vdsc-toggle { margin-left: 0; }
 .vdsc-global .vdsc-langs { margin-left: 0; }
+.vdsc-browse-label { font-size: 10.5px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase;
+    color: rgba(255, 255, 255, 0.32); margin: 0 0 10px 2px; }
 
 /* ── 'Not interested' card button ──────────────────────────────────────────── */
 .vsr-card { position: relative; }