feat(05-03): add getClientActiveOffers query + active offers section on client detail page

- Add ClientActiveOfferSummary type to admin-queries.ts
- Add getClientActiveOffers() function joining project_offers with offer_micros
- Only selects public_name (never internal_name) per CLAUDE.md constraint
- Update /admin/clients/[id] to fetch active offers in parallel with project data
- Add Offerte Attive section at bottom of client detail page

src/lib/admin-queries.ts

@@ -641,4 +641,47 @@ export async function getClientWithProjects(clientId: string): Promise<ClientWit
       created_at: p.created_at,
     })),
   };
+}
+
+// ── ClientActiveOfferSummary — used by /admin/clients/[id] offers section ─────
+
+export type ClientActiveOfferSummary = {
+  offer_id: string;
+  project_id: string;
+  project_name: string;
+  public_name: string;        // offer_micros.public_name — NEVER internal_name
+  accepted_total: string | null;
+};
+
+export async function getClientActiveOffers(clientId: string): Promise<ClientActiveOfferSummary[]> {
+  const projectRows = await db
+    .select({ id: projects.id, name: projects.name })
+    .from(projects)
+    .where(eq(projects.client_id, clientId));
+
+  if (projectRows.length === 0) return [];
+
+  const projectIds = projectRows.map((p) => p.id);
+  const projectNameMap = new Map(projectRows.map((p) => [p.id, p.name]));
+
+  // Explicit column selection — public_name only, NEVER internal_name
+  const rows = await db
+    .select({
+      offer_id: project_offers.id,
+      project_id: project_offers.project_id,
+      public_name: offer_micros.public_name,
+      accepted_total: project_offers.accepted_total,
+    })
+    .from(project_offers)
+    .innerJoin(offer_micros, eq(project_offers.micro_id, offer_micros.id))
+    .where(inArray(project_offers.project_id, projectIds))
+    .orderBy(asc(project_offers.created_at));
+
+  return rows.map((r) => ({
+    offer_id: r.offer_id,
+    project_id: r.project_id,
+    project_name: projectNameMap.get(r.project_id) ?? "—",
+    public_name: r.public_name,
+    accepted_total: r.accepted_total ? String(r.accepted_total) : null,
+  }));
 }