feat: the upload bar says how long is left, not a notice before it

The product page's notice about the upload time is gone. The cart's upload
bar now reads "Enviando seus arquivos · faltam cerca de 6 min", measured
from the upload's own speed (a range from the size for the first seconds),
with a line saying the time depends on the internet and to keep the page
open. The header and the pay button show the same time instead of a
percentage.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/site-v2.css

@@ -339,8 +339,6 @@ section+section{border-top:0}
 /* The payment pages: paying on the left, the order summary on the right */
 html:is([data-rota="pagamento"],[data-rota="pix"]) .checkout{max-width:1040px;margin-top:8px}
 html:is([data-rota="pagamento"],[data-rota="pix"]) .pagGrid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:32px;align-items:start}
-.avisoEnvio{margin:10px 0 0;padding:10px 12px;border-radius:8px;background:var(--aviso-fundo);color:#5A3A00;font-size:15px;line-height:1.5}
-.avisoEnvio[hidden]{display:none}
 .ic{width:21px;height:21px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}
 .busca .lupa{display:flex;font-size:0}
 .busca .lupa .ic{width:18px;height:18px}
@@ -373,6 +371,7 @@ html:is([data-rota="pagamento"],[data-rota="pix"]) .pagGrid{display:grid;grid-te
 .qi .c .ic{width:15px;height:15px;stroke-width:3}
 .passos a span .ic{width:17px;height:17px;stroke-width:3}
 .obr{color:#B42318;font-weight:700}
+.envioNota{display:block;margin-top:4px;font-size:14px;color:var(--fraco)}
 .envioArq{font-size:15px;color:var(--texto2);margin-top:14px;line-height:1.5}
 .envioArq.ok{color:var(--verde)}
 .envioArq.erro{color:#B42318}