feat: hide zero-seeder results with z key (#49)

src/ui/keymap.ts

@@ -31,6 +31,7 @@ export const HELP_GROUPS: HelpGroup[] = [
       { keys: "d", label: "Download" },
       { keys: "D", label: "Download to a folder…" },
       { keys: "s", label: "Sort results" },
+      { keys: "z", label: "Hide dead torrents" },
       { keys: "y", label: "Copy magnet" },
       { keys: "m", label: "Paste magnet" },
     ],
@@ -113,6 +114,7 @@ export function footerHints(
     { keys: "d/D", label: "Download" },
     { keys: "y", label: "Copy" },
     { keys: "s", label: "Sort" },
+    { keys: "z", label: "Alive" },
     { keys: "/", label: "Search" },
     SWITCH,
     ALWAYS,