init: kovakemlak-crm project scaffold

- Next.js 16 + Appwrite multi-tenant emlak CRM
- Database: kovakemlak-db (properties, customers, customer_searches, property_matches, presentations, investors, activities, tenant_settings)
- Same stack as isletmem-kovakcrm (shadcn/ui template base)
- Modules: portföy, müşteri takibi, arama kriterleri, otomatik eşleştirme, sunum linki, yatırımcı portalı

src/app/(dashboard)/customers/page.tsx

@@ -0,0 +1,54 @@
+import type { Metadata } from "next";
+import { redirect } from "next/navigation";
+
+import { UsageBanner } from "@/components/billing/usage-banner";
+import { listCustomers } from "@/lib/appwrite/customer-queries";
+import { getPlanUsage } from "@/lib/appwrite/plan-limits";
+import { requireTenant } from "@/lib/appwrite/tenant-guard";
+import { CustomersClient } from "./components/customers-client";
+
+export const metadata: Metadata = {
+  title: "İşletmem — Müşteriler",
+};
+
+export default async function CustomersPage() {
+  let ctx;
+  try {
+    ctx = await requireTenant();
+  } catch {
+    redirect("/onboarding");
+  }
+
+  const [customers, usage] = await Promise.all([
+    listCustomers(ctx.tenantId),
+    getPlanUsage(ctx),
+  ]);
+
+  return (
+    <div className="flex-1 space-y-6 px-6 pt-0">
+      <div className="flex flex-col gap-1">
+        <p className="text-muted-foreground text-sm">{ctx.settings?.companyName ?? "Çalışma alanı"}</p>
+        <h1 className="text-2xl font-bold tracking-tight">Müşteriler</h1>
+        <p className="text-muted-foreground text-sm">
+          Müşterilerinizi yönetin, hizmet ve yazılım ilişkilerini buradan kurun.
+        </p>
+      </div>
+
+      <UsageBanner usage={usage} resource="customers" />
+
+      <CustomersClient
+        customers={customers.map((c) => ({
+          id: c.$id,
+          name: c.name,
+          email: c.email ?? "",
+          phone: c.phone ?? "",
+          taxId: c.taxId ?? "",
+          address: c.address ?? "",
+          notes: c.notes ?? "",
+          status: (c.status ?? "active") as "active" | "passive",
+          createdAt: c.$createdAt,
+        }))}
+      />
+    </div>
+  );
+}