feat(feed): 1D — content-type chips + sort in a toolbar above the cards

Move content type and ordering out of the filter sidebar into a feed toolbar (approved
proposal 2): a prominent content-type chip row (Normal/Shorts/Live toggle chips) with the
sort control + count + reshuffle in a quieter row beneath it. The toolbar renders even on
'no matches' so content-type can be turned back on after it filtered everything out. The
sidebar keeps Show / Upload date / Language / Topic; 'sort' and 'content' widgets removed
from the layout (normalizeLayout drops them from any saved layout). New feed.sortLabel
string (HU/EN/DE).

frontend/src/components/Sidebar.tsx

@@ -215,9 +215,7 @@ export default function Sidebar({
 
   const available: Record<WidgetId, boolean> = {
     show: true,
-    sort: true,
     date: true,
-    content: true,
     language: languages.length > 0,
     topic: topics.length > 0,
   };
@@ -257,41 +255,6 @@ export default function Sidebar({
             ))}
           </div>
         );
-      case "sort":
-        return (
-          <div className="flex items-center gap-1.5">
-            <select
-              value={filters.sort}
-              onChange={(e) => {
-                const sort = e.target.value;
-                // Seed shuffle on selection so it lands on a fresh order, not the
-                // deterministic seed-0 one every time.
-                setFilters({
-                  ...filters,
-                  sort,
-                  seed: sort === "shuffle" ? rollSeed() : undefined,
-                });
-              }}
-              className="w-full bg-card border border-border rounded-lg px-2 py-1.5 text-sm outline-none focus:border-accent"
-            >
-              {SORT_IDS.map((id) => (
-                <option key={id} value={id}>
-                  {t("sidebar.sort." + id)}
-                </option>
-              ))}
-            </select>
-            {filters.sort === "shuffle" && (
-              <button
-                onClick={() => setFilters({ ...filters, seed: rollSeed() })}
-                title={t("sidebar.reshuffle")}
-                aria-label={t("sidebar.reshuffle")}
-                className="shrink-0 p-1.5 rounded-lg border border-border bg-card text-fg shadow-sm hover:border-accent hover:text-accent active:translate-y-px transition"
-              >
-                <RefreshCw className="w-4 h-4" />
-              </button>
-            )}
-          </div>
-        );
       case "date":
         return (
           <>
@@ -381,26 +344,6 @@ export default function Sidebar({
             )}
           </>
         );
-      case "content":
-        return (
-          <>
-            <Toggle
-              label={t("sidebar.content.normal")}
-              checked={filters.includeNormal}
-              onChange={(v) => setFilters({ ...filters, includeNormal: v })}
-            />
-            <Toggle
-              label={t("sidebar.content.shorts")}
-              checked={filters.includeShorts}
-              onChange={(v) => setFilters({ ...filters, includeShorts: v })}
-            />
-            <Toggle
-              label={t("sidebar.content.live")}
-              checked={filters.includeLive}
-              onChange={(v) => setFilters({ ...filters, includeLive: v })}
-            />
-          </>
-        );
       case "language": {
         const chips = visibleChips(languages);
         return (