feat(10-redo-C): CRM leads module — schema, services, UI (Phase 10 redo)

Stage C of staged Phase 10 redo. Restores dangling phase10-wip work:
- schema.ts: leads expansion + activities/reminders tables + relations
- lead-service.ts / lead-validators.ts service layer
- /admin/leads list + detail + actions, LeadTable/LeadDetail/LeadForm
- LogActivityModal, SendQuoteModal, FollowUpWidget on dashboard
- migration 0005 (applied to prod DB in Stage B, along with
  previously-missing 0001/0003/0004 — root cause of all post-deploy
  500s: prod DB had no migrations applied since 0000)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app/admin/leads/actions.ts

@@ -0,0 +1,161 @@
+"use server";
+
+import { z } from "zod";
+import { db } from "@/db";
+import { leads, quotes } from "@/db/schema";
+import { eq } from "drizzle-orm";
+import { createLeadSchema, updateLeadSchema, createActivitySchema } from "@/lib/lead-validators";
+import { revalidatePath } from "next/cache";
+import { createActivity, updateLeadStage } from "@/lib/lead-service";
+
+export async function createLead(data: z.infer<typeof createLeadSchema>) {
+  const parsed = createLeadSchema.safeParse(data);
+
+  if (!parsed.success) {
+    return { success: false, error: parsed.error.issues[0].message };
+  }
+
+  try {
+    const [lead] = await db
+      .insert(leads)
+      .values({
+        name: parsed.data.name,
+        email: parsed.data.email || null,
+        phone: parsed.data.phone || null,
+        company: parsed.data.company || null,
+        status: parsed.data.status || "contacted",
+        notes: parsed.data.notes || null,
+      })
+      .returning();
+
+    revalidatePath("/admin/leads");
+    return { success: true, lead };
+  } catch (error) {
+    console.error("createLead error:", error);
+    return { success: false, error: "Errore nella creazione del lead" };
+  }
+}
+
+export async function updateLead(id: string, data: z.infer<typeof updateLeadSchema>) {
+  const parsed = updateLeadSchema.safeParse(data);
+
+  if (!parsed.success) {
+    return { success: false, error: parsed.error.issues[0].message };
+  }
+
+  try {
+    const updateData: Record<string, any> = { updated_at: new Date() };
+
+    if (parsed.data.name !== undefined) updateData.name = parsed.data.name;
+    if (parsed.data.email !== undefined) updateData.email = parsed.data.email || null;
+    if (parsed.data.phone !== undefined) updateData.phone = parsed.data.phone || null;
+    if (parsed.data.company !== undefined) updateData.company = parsed.data.company || null;
+    if (parsed.data.status !== undefined) updateData.status = parsed.data.status;
+    if (parsed.data.notes !== undefined) updateData.notes = parsed.data.notes || null;
+
+    const [updated] = await db
+      .update(leads)
+      .set(updateData)
+      .where(eq(leads.id, id))
+      .returning();
+
+    revalidatePath("/admin/leads");
+    revalidatePath(`/admin/leads/${id}`);
+    return { success: true, lead: updated };
+  } catch (error) {
+    console.error("updateLead error:", error);
+    return { success: false, error: "Errore nell'aggiornamento" };
+  }
+}
+
+export async function deleteLead(id: string) {
+  try {
+    await db.delete(leads).where(eq(leads.id, id));
+    revalidatePath("/admin/leads");
+    return { success: true };
+  } catch (error) {
+    console.error("deleteLead error:", error);
+    return { success: false, error: "Errore nell'eliminazione" };
+  }
+}
+
+// Activity logging
+export async function logActivity(data: z.infer<typeof createActivitySchema>) {
+  const parsed = createActivitySchema.safeParse(data);
+
+  if (!parsed.success) {
+    return { success: false, error: parsed.error.issues[0].message };
+  }
+
+  try {
+    const activity = await createActivity({
+      lead_id: parsed.data.lead_id,
+      type: parsed.data.type,
+      activity_date: new Date(parsed.data.activity_date),
+      duration_minutes: parsed.data.duration_minutes,
+      notes: parsed.data.notes,
+    });
+
+    revalidatePath(`/admin/leads/${parsed.data.lead_id}`);
+    return { success: true, activity };
+  } catch (error) {
+    console.error("logActivity error:", error);
+    return { success: false, error: "Errore nella registrazione" };
+  }
+}
+
+// Quote assignment
+const assignQuoteSchema = z.object({
+  lead_id: z.string().min(1),
+  quote_token: z.string().optional(),
+  generate_new: z.boolean(),
+});
+
+export async function assignQuoteToLead(data: z.infer<typeof assignQuoteSchema>) {
+  const parsed = assignQuoteSchema.safeParse(data);
+
+  if (!parsed.success) {
+    return { success: false, error: parsed.error.issues[0].message };
+  }
+
+  try {
+    if (parsed.data.generate_new) {
+      // Redirect handled on client; this is a no-op
+      return { success: true };
+    }
+
+    // Link quote to lead and update lead status
+    const token = parsed.data.quote_token;
+    const leadId = parsed.data.lead_id;
+
+    if (!token) {
+      return { success: false, error: "Token preventivo richiesto" };
+    }
+
+    // Find quote by token
+    const [quote] = await db
+      .select()
+      .from(quotes)
+      .where(eq(quotes.token, token))
+      .limit(1);
+
+    if (!quote) {
+      return { success: false, error: "Preventivo non trovato" };
+    }
+
+    // Update quote to link to lead (if not already linked)
+    await db
+      .update(quotes)
+      .set({ lead_id: leadId })
+      .where(eq(quotes.id, quote.id));
+
+    // Update lead status to "proposal_sent"
+    await updateLeadStage(leadId, "proposal_sent");
+
+    revalidatePath(`/admin/leads/${leadId}`);
+    return { success: true };
+  } catch (error) {
+    console.error("assignQuoteToLead error:", error);
+    return { success: false, error: "Errore nell'assegnazione" };
+  }
+}