style: rifinitura Quiet Luxury dashboard — bordi soft, badge, colori

Allinea la dashboard alla rifinitura del mock (finezza bordi/colori/badge):

- Card su border-border-light (slate-100) per il bordo sottile
- KPI: valore verde su Incassato Reale, delta verde "+N questo mese" su
  Clienti Attivi (nuova metrica getDashboardStats.clientiNuoviMese)
- Redditività: badge "Ottimo" con tint emerald soft (non brand primary)
- Follow-up: righe come box bordati (no avatar), link "Apri →" primary
- Forecast: selettore anno (pill interattiva) spostato nell'header della card,
  barre non-picco grigie (bg-border), rimosso il numero "mese prossimo"
- Offerte Più Richieste: rimossa la pill totale nell'header

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/admin/dashboard/ClientProfitability.tsx

@@ -17,7 +17,7 @@ const MARGIN_LABEL: Record<ClientProfitabilityRow["margin"], string> = {
 
 export function ClientProfitability({ data }: { data: ClientProfitabilityRow[] }) {
   return (
-    <div className="bg-card rounded-xl border border-border shadow-card p-6">
+    <div className="bg-card rounded-xl border border-border-light shadow-card p-6">
       <h3 className="text-xs font-bold uppercase tracking-wider text-muted-foreground mb-4">
         Analisi Oraria &amp; Redditività Clienti
       </h3>
@@ -33,7 +33,7 @@ export function ClientProfitability({ data }: { data: ClientProfitabilityRow[] }
             return (
               <div
                 key={row.clientId}
-                className="flex items-center justify-between gap-4 p-3 rounded-lg border border-border bg-muted/30"
+                className="flex items-center justify-between gap-4 p-3 rounded-lg border border-border-light bg-muted/30"
               >
                 <div className="min-w-0">
                   <h4 className="text-xs font-semibold text-foreground truncate">
@@ -50,7 +50,7 @@ export function ClientProfitability({ data }: { data: ClientProfitabilityRow[] }
                   <span
                     className={`text-xs font-bold font-mono px-2 py-0.5 rounded border ${
                       isOttimo
-                        ? "text-primary bg-primary/10 border-primary/20"
+                        ? "text-emerald-700 bg-emerald-50 border-emerald-100 dark:text-emerald-400 dark:bg-emerald-500/10 dark:border-emerald-500/20"
                         : "text-foreground bg-muted border-border"
                     }`}
                   >