feat(03-03): QuoteTab component + Preventivo tab in client detail page

- Create QuoteTab.tsx: catalog dropdown + freeform toggle + items table + accepted total editor
- Wire QuoteTab as 5th tab (Preventivo) in /admin/clients/[id]/page.tsx
- Destructure quoteItems + activeServices from getClientFullDetail result
- TypeScript clean, build passes

src/app/admin/clients/[id]/page.tsx

@@ -5,6 +5,7 @@ import { PhasesTab } from "@/components/admin/tabs/PhasesTab";
 import { PaymentsTab } from "@/components/admin/tabs/PaymentsTab";
 import { DocumentsTab } from "@/components/admin/tabs/DocumentsTab";
 import { CommentsTab } from "@/components/admin/tabs/CommentsTab";
+import { QuoteTab } from "@/components/admin/tabs/QuoteTab";
 import { PhasesViewToggle } from "@/components/admin/kanban/PhasesViewToggle";
 import { ClientActions } from "@/components/admin/ClientActions";
 import Link from "next/link";
@@ -20,7 +21,7 @@ export default async function ClientDetailPage({
   const detail = await getClientFullDetail(id);
   if (!detail) notFound();
 
-  const { client, phases, payments, documents, comments } = detail;
+  const { client, phases, payments, documents, comments, quoteItems, activeServices } = detail;
 
   return (
     <div>
@@ -59,6 +60,7 @@ export default async function ClientDetailPage({
           <TabsTrigger value="payments">Pagamenti</TabsTrigger>
           <TabsTrigger value="documents">Documenti</TabsTrigger>
           <TabsTrigger value="comments">Commenti</TabsTrigger>
+          <TabsTrigger value="quote">Preventivo</TabsTrigger>
         </TabsList>
 
         <TabsContent value="phases">
@@ -81,6 +83,14 @@ export default async function ClientDetailPage({
         <TabsContent value="comments">
           <CommentsTab comments={comments} phases={phases} clientId={client.id} />
         </TabsContent>
+        <TabsContent value="quote">
+          <QuoteTab
+            clientId={client.id}
+            items={quoteItems}
+            activeServices={activeServices}
+            acceptedTotal={client.accepted_total ?? "0"}
+          />
+        </TabsContent>
       </Tabs>
     </div>
   );

src/components/admin/tabs/QuoteTab.tsx

@@ -0,0 +1,333 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter } from "next/navigation";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import {
+  addQuoteItem,
+  removeQuoteItem,
+  updateAcceptedTotal,
+} from "@/app/admin/clients/[id]/quote-actions";
+import type { QuoteItemWithLabel } from "@/lib/admin-queries";
+import type { ServiceCatalog } from "@/db/schema";
+
+type Props = {
+  clientId: string;
+  items: QuoteItemWithLabel[];
+  activeServices: ServiceCatalog[];
+  acceptedTotal: string;
+};
+
+export function QuoteTab({ clientId, items, activeServices, acceptedTotal }: Props) {
+  const [showCustom, setShowCustom] = useState(false);
+  const [addError, setAddError] = useState<string | null>(null);
+  const [totalError, setTotalError] = useState<string | null>(null);
+  // For catalog mode: pre-fill unit_price when service is selected
+  const [selectedServicePrice, setSelectedServicePrice] = useState<string>("");
+  const [, startTransition] = useTransition();
+  const router = useRouter();
+
+  const calculatedTotal = items.reduce(
+    (sum, item) => sum + parseFloat(item.subtotal),
+    0
+  );
+
+  function handleAddItem(fd: FormData) {
+    setAddError(null);
+    startTransition(async () => {
+      try {
+        await addQuoteItem(clientId, fd);
+        router.refresh();
+      } catch (e) {
+        setAddError(e instanceof Error ? e.message : "Errore nell'aggiunta");
+      }
+    });
+  }
+
+  function handleRemove(quoteItemId: string) {
+    startTransition(async () => {
+      await removeQuoteItem(quoteItemId, clientId);
+      router.refresh();
+    });
+  }
+
+  function handleSaveTotal(fd: FormData) {
+    setTotalError(null);
+    startTransition(async () => {
+      try {
+        await updateAcceptedTotal(clientId, fd);
+        router.refresh();
+      } catch (e) {
+        setTotalError(
+          e instanceof Error ? e.message : "Errore nel salvataggio"
+        );
+      }
+    });
+  }
+
+  return (
+    <div className="space-y-6 max-w-2xl">
+
+      {/* Section 1: Add items */}
+      <div className="bg-white border border-[#e5e7eb] rounded-xl p-4 space-y-4">
+        <h3 className="text-xs font-bold text-[#71717a] uppercase tracking-wider">
+          Aggiungi voci
+        </h3>
+
+        {!showCustom ? (
+          /* Catalog mode */
+          <form action={handleAddItem} className="space-y-3">
+            <input type="hidden" name="custom_label" value="" />
+            <div className="flex items-end gap-3 flex-wrap">
+              <div className="flex-1 min-w-[180px] space-y-1">
+                <Label htmlFor="service_id">Seleziona dal catalogo</Label>
+                <select
+                  name="service_id"
+                  id="service_id"
+                  className="w-full border border-[#e5e7eb] rounded-md px-3 py-2 text-sm bg-white focus:outline-none focus:ring-2 focus:ring-[#1A463C]/30"
+                  onChange={(e) => {
+                    const svc = activeServices.find((s) => s.id === e.target.value);
+                    setSelectedServicePrice(
+                      svc ? parseFloat(svc.unit_price).toFixed(2) : ""
+                    );
+                  }}
+                  required
+                >
+                  <option value="">— Scegli servizio —</option>
+                  {activeServices.map((s) => (
+                    <option key={s.id} value={s.id}>
+                      {s.name} (€
+                      {parseFloat(s.unit_price).toLocaleString("it-IT", {
+                        minimumFractionDigits: 2,
+                      })}
+                      )
+                    </option>
+                  ))}
+                </select>
+              </div>
+              <div className="w-28 space-y-1">
+                <Label htmlFor="unit_price_catalog">Prezzo unit.</Label>
+                <Input
+                  id="unit_price_catalog"
+                  name="unit_price"
+                  type="number"
+                  step="0.01"
+                  min="0.01"
+                  value={selectedServicePrice}
+                  onChange={(e) => setSelectedServicePrice(e.target.value)}
+                  placeholder="0.00"
+                  required
+                />
+              </div>
+              <div className="w-20 space-y-1">
+                <Label htmlFor="quantity_catalog">Qty</Label>
+                <Input
+                  id="quantity_catalog"
+                  name="quantity"
+                  type="number"
+                  step="0.01"
+                  min="0.01"
+                  defaultValue="1"
+                  required
+                />
+              </div>
+              <Button
+                type="submit"
+                size="sm"
+                className="bg-[#1A463C] text-white hover:bg-[#1A463C]/90"
+              >
+                Aggiungi
+              </Button>
+            </div>
+            <button
+              type="button"
+              onClick={() => {
+                setShowCustom(true);
+                setAddError(null);
+              }}
+              className="text-xs text-[#71717a] hover:text-[#1a1a1a] underline"
+            >
+              Oppure aggiungi voce libera →
+            </button>
+            {addError && <p className="text-xs text-red-600">{addError}</p>}
+          </form>
+        ) : (
+          /* Freeform mode */
+          <form action={handleAddItem} className="space-y-3">
+            <input type="hidden" name="service_id" value="" />
+            <div className="space-y-1">
+              <Label htmlFor="custom_label">Nome voce</Label>
+              <Input
+                id="custom_label"
+                name="custom_label"
+                placeholder="es. Consulenza extra, Spese viaggi"
+                required
+              />
+            </div>
+            <div className="flex gap-3 flex-wrap">
+              <div className="flex-1 min-w-[120px] space-y-1">
+                <Label htmlFor="unit_price_custom">Prezzo unitario (€)</Label>
+                <Input
+                  id="unit_price_custom"
+                  name="unit_price"
+                  type="number"
+                  step="0.01"
+                  min="0.01"
+                  placeholder="0.00"
+                  required
+                />
+              </div>
+              <div className="w-20 space-y-1">
+                <Label htmlFor="quantity_custom">Qty</Label>
+                <Input
+                  id="quantity_custom"
+                  name="quantity"
+                  type="number"
+                  step="0.01"
+                  min="0.01"
+                  defaultValue="1"
+                  required
+                />
+              </div>
+            </div>
+            {addError && <p className="text-xs text-red-600">{addError}</p>}
+            <div className="flex gap-2">
+              <Button
+                type="submit"
+                size="sm"
+                className="bg-[#1A463C] text-white hover:bg-[#1A463C]/90"
+              >
+                Aggiungi voce libera
+              </Button>
+              <Button
+                type="button"
+                variant="ghost"
+                size="sm"
+                onClick={() => {
+                  setShowCustom(false);
+                  setAddError(null);
+                }}
+              >
+                Torna al catalogo
+              </Button>
+            </div>
+          </form>
+        )}
+      </div>
+
+      {/* Section 2: Quote items table + calculated total */}
+      <div className="bg-white border border-[#e5e7eb] rounded-xl p-4">
+        <h3 className="text-xs font-bold text-[#71717a] uppercase tracking-wider mb-3">
+          Voci preventivo
+        </h3>
+        {items.length === 0 ? (
+          <p className="text-sm text-[#71717a] py-4 text-center">
+            Nessuna voce aggiunta. Seleziona dal catalogo per iniziare.
+          </p>
+        ) : (
+          <>
+            <div className="overflow-x-auto">
+              <table className="w-full text-sm">
+                <thead className="border-b border-[#e5e7eb]">
+                  <tr>
+                    <th className="text-left py-2 px-2 font-medium text-[#71717a]">
+                      Voce
+                    </th>
+                    <th className="text-right py-2 px-2 font-medium text-[#71717a]">
+                      Qty
+                    </th>
+                    <th className="text-right py-2 px-2 font-medium text-[#71717a]">
+                      Prezzo unit.
+                    </th>
+                    <th className="text-right py-2 px-2 font-medium text-[#71717a]">
+                      Subtotale
+                    </th>
+                    <th className="py-2 px-2"></th>
+                  </tr>
+                </thead>
+                <tbody>
+                  {items.map((item) => (
+                    <tr
+                      key={item.id}
+                      className="border-b border-[#f4f4f5] hover:bg-[#f9f9f9]"
+                    >
+                      <td className="py-2 px-2 text-[#1a1a1a]">{item.label}</td>
+                      <td className="py-2 px-2 text-right tabular-nums">
+                        {parseFloat(item.quantity).toLocaleString("it-IT", {
+                          minimumFractionDigits: 2,
+                        })}
+                      </td>
+                      <td className="py-2 px-2 text-right tabular-nums font-mono">
+                        €
+                        {parseFloat(item.unit_price).toLocaleString("it-IT", {
+                          minimumFractionDigits: 2,
+                        })}
+                      </td>
+                      <td className="py-2 px-2 text-right tabular-nums font-mono font-medium">
+                        €
+                        {parseFloat(item.subtotal).toLocaleString("it-IT", {
+                          minimumFractionDigits: 2,
+                        })}
+                      </td>
+                      <td className="py-2 px-2 text-right">
+                        <button
+                          type="button"
+                          onClick={() => handleRemove(item.id)}
+                          className="text-xs text-[#71717a] hover:text-red-600 transition-colors"
+                        >
+                          Rimuovi
+                        </button>
+                      </td>
+                    </tr>
+                  ))}
+                </tbody>
+              </table>
+            </div>
+            <div className="mt-3 pt-3 border-t border-[#e5e7eb] flex justify-end">
+              <p className="font-bold text-[#1a1a1a] tabular-nums">
+                Totale calcolato: €
+                {calculatedTotal.toLocaleString("it-IT", {
+                  minimumFractionDigits: 2,
+                })}
+              </p>
+            </div>
+          </>
+        )}
+      </div>
+
+      {/* Section 3: Accepted total */}
+      <div className="bg-white border border-[#e5e7eb] rounded-xl p-4 space-y-3">
+        <h3 className="text-xs font-bold text-[#71717a] uppercase tracking-wider">
+          Totale accettato dal cliente
+        </h3>
+        <form action={handleSaveTotal} className="flex items-end gap-3">
+          <div className="flex-1 max-w-[200px] space-y-1">
+            <Label htmlFor="accepted_total">Importo (€)</Label>
+            <Input
+              id="accepted_total"
+              name="accepted_total"
+              type="number"
+              step="0.01"
+              min="0"
+              defaultValue={parseFloat(acceptedTotal).toFixed(2)}
+            />
+          </div>
+          <Button
+            type="submit"
+            size="sm"
+            className="bg-[#1A463C] text-white hover:bg-[#1A463C]/90"
+          >
+            Salva
+          </Button>
+        </form>
+        {totalError && <p className="text-xs text-red-600">{totalError}</p>}
+        <p className="text-xs text-[#71717a]">
+          Il cliente vede solo questo importo, non le singole voci del preventivo.
+        </p>
+      </div>
+
+    </div>
+  );
+}