Give the token ledger its own card on the dashboard

The AI card answers whether the model is healthy now; what it has spent over a month was a
different question crowding it out one line at a time.

Plugin/unraid/include/ai.php

@@ -511,15 +511,16 @@ function vv_ai_stats_cached(bool $live = false): array {
 // cache write, and — worse — the dashboard and the AI tab could disagree about whether the model
 // is resident, because they would have asked at different moments.
 //
-// Tokens are not part of vv_ai_stats(): that function's shape is the AI tab's banner contract,
-// and the ledger read is 15ms, so it is fetched here rather than widening the payload everything
-// else carries.
+// Tokens are deliberately absent. This block once carried today's total for a single line on the
+// AI card; that line is now a card of its own, which fetches the whole ledger from
+// api/ai.php?action=tokens because it shows the week and all-time beside today. Leaving the field
+// here would have run vv_ai_token_stats() on every cache write — once a minute, forever — and
+// discarded all but one number of it that nothing reads.
 function vv_ai_monitor_block(array $stats): array {
     return [
         'model'   => $stats['model']   ?? '',
         'runtime' => $stats['runtime'] ?? [],
         'index'   => $stats['index']   ?? [],
-        'tokens'  => vv_ai_token_stats()['today'] ?? null,
     ];
 }