Global search: Cmd/Ctrl-K palette for teams and matches

A keyboard-first palette (plus a header button) that jumps to any team
page or match page — arrow keys, enter, esc; flags and kickoff days in
the results. Pure client, searches the snapshot already in memory.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/lib/i18n/en.ts

@@ -101,6 +101,12 @@ export const en = {
     lineups: "Lineups",
     keyPlayers: "Key players (all-time top scorers)",
   },
+  search: {
+    title: "Search",
+    placeholder: "Team or match…",
+    hint: "Type at least two letters — teams and matches.",
+    noResults: "Nothing found.",
+  },
   notFound: {
     message: "Off the pitch — this page doesn't exist.",
     backToLive: "Back to Live",