feat: lead → client conversion + client contact fields (email/phone)

Blocco A+B (milestone v2.3). Migration 0011 is additive (ADD COLUMN only):
clients.email, clients.phone, leads.archived.

- createClientCore() extracted from createClient and reused by conversion
- clients.email/phone added to create + edit forms and shown on client header
  (never exposed on the public /client/[token] page)
- convertLeadToClient(): reuses core, carries over lead transcripts
  (client_transcripts.client_id), links project.created_from_lead_id,
  archives the lead while keeping its "won" status; idempotent
- "Converti in cliente" button on won leads; "Convertito → Apri cliente"
  once converted (clientId resolved via created_from_lead_id)
- archived leads hidden from list/kanban; detail page fetches by id incl. archived

Migration must be applied to the prod DB BEFORE this is deployed.

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

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

@@ -1,18 +1,21 @@
 import { notFound } from "next/navigation";
 import { getActivityLog, getUpcomingReminders, getTranscripts } from "@/lib/lead-service";
-import { getLeadsWithTags, getLeadFieldOptions } from "@/lib/admin-queries";
+import {
+  getLeadByIdWithTags,
+  getLeadFieldOptions,
+  getClientIdFromLead,
+} from "@/lib/admin-queries";
 import { LeadDetail } from "@/components/admin/leads/LeadDetail";
 
 export default async function LeadDetailPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params;
 
-  const [leads, options] = await Promise.all([
-    getLeadsWithTags(),
+  const [lead, options, convertedClientId] = await Promise.all([
+    getLeadByIdWithTags(id),
     getLeadFieldOptions(),
+    getClientIdFromLead(id),
   ]);
 
-  const lead = leads.find((l) => l.id === id);
-
   if (!lead) {
     notFound();
   }
@@ -31,6 +34,7 @@ export default async function LeadDetailPage({ params }: { params: Promise<{ id:
       tags={lead.tags}
       tagOptions={options.tags}
       transcripts={transcripts}
+      convertedClientId={convertedClientId}
     />
   );
 }

src/app/admin/leads/actions.ts

@@ -2,7 +2,7 @@
 
 import { z } from "zod";
 import { db } from "@/db";
-import { leads, quotes, tags, clientTranscripts } from "@/db/schema";
+import { leads, quotes, tags, clientTranscripts, projects } from "@/db/schema";
 import { nanoid } from "nanoid";
 import { eq, and } from "drizzle-orm";
 import {
@@ -12,10 +12,61 @@ import {
   LEAD_STAGES,
 } from "@/lib/lead-validators";
 import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
 import { createActivity, updateLeadStage } from "@/lib/lead-service";
+import { createClientCore } from "@/app/admin/clients/new/actions";
 import { getServerSession } from "next-auth";
 import { authOptions } from "@/lib/auth";
 
+async function requireAdminSession() {
+  const session = await getServerSession(authOptions);
+  if (!session) throw new Error("Non autorizzato");
+}
+
+// Converts a lead into a client (reusing createClientCore): creates the client
+// + default project (linked via created_from_lead_id) + payment stubs, carries
+// over the lead's call transcripts, then archives the lead while keeping its
+// "won" status. Idempotent: a lead already converted just redirects to its
+// client. Redirects to the new client page on success.
+export async function convertLeadToClient(leadId: string): Promise<void> {
+  await requireAdminSession();
+
+  const [lead] = await db.select().from(leads).where(eq(leads.id, leadId)).limit(1);
+  if (!lead) throw new Error("Lead non trovato");
+
+  // Already converted? Redirect to the linked client instead of duplicating.
+  const [existing] = await db
+    .select({ client_id: projects.client_id })
+    .from(projects)
+    .where(eq(projects.created_from_lead_id, leadId))
+    .limit(1);
+  if (existing) {
+    redirect(`/admin/clients/${existing.client_id}`);
+  }
+
+  const { clientId } = await createClientCore({
+    name: lead.name,
+    brand_name: lead.company?.trim() || lead.name,
+    brief: lead.notes?.trim() || `Lead convertito: ${lead.name}`,
+    email: lead.email,
+    phone: lead.phone,
+    created_from_lead_id: lead.id,
+  });
+
+  // Carry over the lead's transcripts to the new client.
+  await db
+    .update(clientTranscripts)
+    .set({ client_id: clientId, lead_id: null })
+    .where(eq(clientTranscripts.lead_id, leadId));
+
+  // Archive the lead but keep its "won" status (traceability without clutter).
+  await db.update(leads).set({ archived: true }).where(eq(leads.id, leadId));
+
+  revalidatePath("/admin/leads");
+  revalidatePath("/admin");
+  redirect(`/admin/clients/${clientId}`);
+}
+
 export async function createLead(data: z.infer<typeof createLeadSchema>) {
   const parsed = createLeadSchema.safeParse(data);