apps/api/src/vehicles/vehicles.controller.ts

@@ -20,6 +20,19 @@ export class VehiclesController {
     return this.vehiclesService.previewVin(vin);
   }
 
+  /**
+   * Public catalog-stats teaser for /register?vin= — returns categories /
+   * parts / schemas counts so the signup page can frame "what opens after
+   * register". Real data when DB is meaningfully populated; otherwise a
+   * deterministic VIN-seeded placeholder. Source/provider names are never
+   * exposed.
+   */
+  @Public()
+  @Get(":vin/teaser-stats")
+  async teaserStats(@Param("vin", VinValidationPipe) vin: string) {
+    return this.vehiclesService.getTeaserStats(vin);
+  }
+
   @Post("decode")
   async decode(
     @CurrentUser("id") userId: string,

apps/api/src/vehicles/vehicles.service.ts

@@ -8,7 +8,7 @@ import {
 } from "@nestjs/common";
 import { isValidVin } from "@sase/shared";
 import { Queue } from "bullmq";
-import { and, desc, eq, or } from "drizzle-orm";
+import { and, desc, eq, or, sql } from "drizzle-orm";
 import { DATABASE, type Database } from "../database/database.provider";
 import {
   brands,
@@ -265,6 +265,71 @@ export class VehiclesService {
     return savedVehicle;
   }
 
+  /**
+   * Public conversion-teaser stats for /register?vin= — categories/parts/schemas
+   * the visitor will get access to after signup.
+   *
+   * Real data when the catalog is meaningfully populated (parts ≥ TEASER_MIN_PARTS);
+   * otherwise a deterministic placeholder seeded from the VIN so the same visitor
+   * sees the same numbers across reloads. Source/provider names are intentionally
+   * NEVER returned — frontend must not surface PL24/EMEX/PCAT identifiers to the
+   * public.
+   */
+  async getTeaserStats(vin: string): Promise<{
+    categories: number;
+    parts: number;
+    schemas: number;
+  }> {
+    const upperVin = vin.toUpperCase();
+    const TEASER_MIN_PARTS = 1000;
+
+    // Deterministic placeholder — same VIN always yields the same numbers,
+    // so refreshing the register page doesn't flip displayed counts.
+    const seed = this.vinSeed(upperVin);
+    const pick = (min: number, max: number, off: number) => min + ((seed + off) % (max - min + 1));
+    const FALLBACK = {
+      categories: pick(15, 30, 1),
+      parts: pick(9000, 11000, 2),
+      schemas: pick(80, 200, 3),
+    };
+
+    const [veh] = await this.db
+      .select({ id: vehicles.id })
+      .from(vehicles)
+      .where(eq(vehicles.vin, upperVin))
+      .orderBy(desc(vehicles.createdAt))
+      .limit(1);
+
+    if (!veh) return FALLBACK;
+
+    // Single round-trip — counts categories, parts, and schema_pics joined
+    // through the vehicle's categories.
+    const rows = (await this.db.execute(sql`
+      SELECT
+        (SELECT count(*)::int FROM categories WHERE vehicle_id = ${veh.id}) AS cats,
+        (SELECT count(*)::int FROM parts WHERE vehicle_id = ${veh.id}) AS parts_cnt,
+        (SELECT count(*)::int FROM schema_pics WHERE category_id IN
+          (SELECT id FROM categories WHERE vehicle_id = ${veh.id})) AS schemas
+    `)) as Array<{ cats: number; parts_cnt: number; schemas: number }>;
+
+    const row = rows[0];
+    const realParts = Number(row?.parts_cnt ?? 0);
+    const realCats = Number(row?.cats ?? 0);
+    const realSchemas = Number(row?.schemas ?? 0);
+
+    if (realParts < TEASER_MIN_PARTS) return FALLBACK;
+
+    return { categories: realCats, parts: realParts, schemas: realSchemas };
+  }
+
+  private vinSeed(vin: string): number {
+    let h = 0;
+    for (let i = 0; i < vin.length; i++) {
+      h = ((h << 5) - h + vin.charCodeAt(i)) | 0;
+    }
+    return Math.abs(h);
+  }
+
   /**
    * Public VIN preview — no auth, no DB save, no brand access check.
    * Checks DB first, then Redis, then external API chain.

apps/web/src/components/demo/demo-banner.tsx

@@ -17,7 +17,7 @@ interface DemoBannerProps {
  */
 export function DemoBanner({ vehicleLabel }: DemoBannerProps) {
   return (
-    <div className="sticky top-0 z-30 w-full border-b border-border bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/80">
+    <div className="sticky top-16 z-30 w-full border-b border-border bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/80">
       <div className="mx-auto flex max-w-7xl items-center justify-between gap-3 px-4 py-2.5 sm:px-6">
         <div className="flex min-w-0 items-center gap-2 text-sm">
           <Eye className="h-4 w-4 shrink-0 text-muted-foreground" />

apps/web/src/components/demo/demo-footer-cta.tsx

@@ -0,0 +1,39 @@
+import { capture } from "@/lib/posthog";
+import { Button } from "@sase/ui";
+import { Link } from "@tanstack/react-router";
+import { ArrowRight } from "lucide-react";
+
+interface DemoFooterCtaProps {
+  /** Analytics surface tag — e.g. "footer", "category_footer". */
+  source: string;
+}
+
+/**
+ * Footer conversion card on /demo pages — anti-gimmick B2B trust strip +
+ * single "Hesap Aç" primary button routed to /register (no VIN carried;
+ * visitors who want to query their own VIN can use the hero on /, or paste
+ * it on the register page itself). Mobile-friendly: full-width button below
+ * the headline; `mb-20` clears the Chatwoot widget in the bottom-right.
+ */
+export function DemoFooterCta({ source }: DemoFooterCtaProps) {
+  return (
+    <div className="mb-20 mt-8 flex flex-col items-start gap-3 rounded-lg border border-border bg-muted/30 p-5 sm:mb-0 sm:flex-row sm:items-center sm:justify-between">
+      <div>
+        <p className="text-sm font-semibold">Sınırsız şase sorgulamak için ücretsiz hesap aç</p>
+        <p className="mt-0.5 text-xs text-muted-foreground">
+          Kart bilgisi gerekmez · 30 gün ücretsiz · istediğin an iptal
+        </p>
+      </div>
+      <Button
+        asChild
+        className="w-full shrink-0 sm:w-auto"
+        data-faro-user-action-name={`demo-footer-cta-${source}`}
+      >
+        <Link to="/register" onClick={() => capture("demo_to_register_click", { source })}>
+          Hesap Aç
+          <ArrowRight className="ml-1 h-4 w-4" />
+        </Link>
+      </Button>
+    </div>
+  );
+}

apps/web/src/routes/_auth/register.tsx

@@ -5,11 +5,13 @@ import { startAction } from "@/lib/faro";
 import { track as trackMeta } from "@/lib/meta-pixel";
 import { capture } from "@/lib/posthog";
 import { toast } from "@/lib/toast";
+import { cleanModelName } from "@/lib/vehicle";
 import { Button } from "@sase/ui";
 import { Input } from "@sase/ui";
 import { Label } from "@sase/ui";
+import { useQuery } from "@tanstack/react-query";
 import { Link, createFileRoute } from "@tanstack/react-router";
-import { Check, Eye, EyeOff, ShieldCheck } from "lucide-react";
+import { Check, CheckCircle2, Eye, EyeOff, ShieldCheck } from "lucide-react";
 import { useRef, useState } from "react";
 
 export const Route = createFileRoute("/_auth/register")({
@@ -28,8 +30,39 @@ export const Route = createFileRoute("/_auth/register")({
 // onboarding detour so the subscription page can preselect it later.
 const PENDING_PLAN_KEY = "sase-pending-plan";
 
+interface VehiclePreview {
+  brandName?: string;
+  model?: string;
+  year?: number;
+  engine?: string;
+}
+interface TeaserStats {
+  categories: number;
+  parts: number;
+  schemas: number;
+}
+
 function RegisterPage() {
   const { vin, ref, plan, example } = Route.useSearch();
+
+  // When a VIN was carried over from the hero, fetch the decoded preview +
+  // catalog-stats teaser so we can show "what's about to open" instead of a
+  // bare form. The preview endpoint is public; teaser-stats falls back to a
+  // VIN-seeded placeholder when the catalog hasn't been drilled yet (no
+  // upstream provider name is ever surfaced to the page).
+  const { data: vehiclePreview } = useQuery<VehiclePreview>({
+    queryKey: ["vehicle-preview", vin],
+    queryFn: () => api.get<VehiclePreview>(`/vehicles/preview/${vin}`),
+    enabled: !!vin && vin.length === 17,
+    staleTime: 5 * 60_000,
+  });
+  const { data: teaserStats } = useQuery<TeaserStats>({
+    queryKey: ["vehicle-teaser-stats", vin],
+    queryFn: () => api.get<TeaserStats>(`/vehicles/${vin}/teaser-stats`),
+    enabled: !!vin && vin.length === 17,
+    staleTime: 5 * 60_000,
+  });
+
   const [name, setName] = useState("");
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
@@ -113,15 +146,70 @@ function RegisterPage() {
 
   return (
     <div className="space-y-8">
+      {/* VIN teaser — only renders when the visitor arrived from the hero
+          with a decoded VIN. Catalog-stat numbers come from /teaser-stats
+          (real data when populated, deterministic VIN-seeded placeholder
+          otherwise — no upstream provider name surfaced). */}
+      {vin && vehiclePreview?.brandName && (
+        <div className="rounded-xl border border-brand/30 bg-brand/5 p-4">
+          <div className="flex items-start gap-2.5">
+            <CheckCircle2 className="mt-0.5 size-5 shrink-0 text-brand" />
+            <div className="min-w-0 flex-1">
+              <p className="text-xs font-medium uppercase tracking-wide text-brand">
+                Aracınız tanındı
+              </p>
+              <p className="mt-0.5 break-words text-base font-semibold leading-snug">
+                {vehiclePreview.brandName} {cleanModelName(vehiclePreview.model) ?? ""}{" "}
+                {vehiclePreview.year && (
+                  <span className="text-muted-foreground">({vehiclePreview.year})</span>
+                )}
+              </p>
+              {vehiclePreview.engine && (
+                <p className="mt-1 text-xs text-muted-foreground">{vehiclePreview.engine}</p>
+              )}
+            </div>
+          </div>
+          {teaserStats && (
+            <dl className="mt-4 grid grid-cols-3 gap-2 border-t border-border/60 pt-3 text-center">
+              <div>
+                <dt className="text-[10px] uppercase tracking-wide text-muted-foreground">
+                  Kategori
+                </dt>
+                <dd className="text-base font-bold tabular-nums">{teaserStats.categories}</dd>
+              </div>
+              <div>
+                <dt className="text-[10px] uppercase tracking-wide text-muted-foreground">
+                  OEM parça
+                </dt>
+                <dd className="text-base font-bold tabular-nums">
+                  {teaserStats.parts.toLocaleString("tr-TR")}
+                </dd>
+              </div>
+              <div>
+                <dt className="text-[10px] uppercase tracking-wide text-muted-foreground">Şema</dt>
+                <dd className="text-base font-bold tabular-nums">{teaserStats.schemas}</dd>
+              </div>
+            </dl>
+          )}
+          <p className="mt-3 text-xs text-muted-foreground">
+            Hesap açtığında bu araç için kataloğa anında erişim açılır.
+          </p>
+        </div>
+      )}
+
       {/* Heading */}
       <div>
-        <h1 className="text-2xl font-bold tracking-tight sm:text-3xl">Kayıt Ol</h1>
-        <p className="mt-2 text-sm text-muted-foreground">Yeni bir Sase.tr hesabı oluşturun</p>
+        <h1 className="text-2xl font-bold tracking-tight sm:text-3xl">
+          {vin ? "Hesap Aç ve Katalogu Gör" : "Hesap Aç"}
+        </h1>
+        <p className="mt-2 text-sm text-muted-foreground">
+          Sınırsız şase sorgulamak için ücretsiz hesap aç
+        </p>
 
-        {/* Trial messaging */}
+        {/* Trust strip — kartsız + iptal + KVKK/SSL rozetleri tek satır */}
         <div className="mt-3 flex items-center gap-2 rounded-lg border border-brand/20 bg-brand/10 px-3 py-2 text-sm text-foreground">
           <ShieldCheck className="size-4 shrink-0 text-brand" />
-          30 gün Full Paket ücretsiz deneyin — kredi kartı gerekmez
+          Kart bilgisi gerekmez · 30 gün ücretsiz · istediğin an iptal
         </div>
       </div>
 
@@ -262,7 +350,7 @@ function RegisterPage() {
         />
 
         <Button type="submit" className="w-full" disabled={loading}>
-          {loading ? "Kayıt yapılıyor..." : "Ücretsiz Başla"}
+          {loading ? "Kayıt yapılıyor..." : vin ? "Hesap Aç ve Katalogu Gör" : "Hesap Aç"}
         </Button>
       </form>
 

apps/web/src/routes/demo.tsx

@@ -1,11 +1,14 @@
 import { DemoBanner } from "@/components/demo/demo-banner";
+import { DemoFooterCta } from "@/components/demo/demo-footer-cta";
+import { SiteFooter } from "@/components/site-footer";
+import { SiteHeader } from "@/components/site-header";
 import { usePageMeta } from "@/hooks/use-page-meta";
 import { ApiError, api } from "@/lib/api-client";
 import { KEYS_8 } from "@/lib/keys";
 import { capture } from "@/lib/posthog";
 import { cleanModelName } from "@/lib/vehicle";
 import type { CategoryNode, Vehicle } from "@sase/shared";
-import { Button, Card, CardContent, CardHeader, CardTitle, Skeleton } from "@sase/ui";
+import { Card, CardContent, CardHeader, CardTitle, Skeleton } from "@sase/ui";
 import { useQuery } from "@tanstack/react-query";
 import { Link, createFileRoute } from "@tanstack/react-router";
 import { ArrowRight, FolderOpen } from "lucide-react";
@@ -55,32 +58,37 @@ function DemoVehiclePage() {
 
   if (vehicleError) {
     return (
-      <div className="min-h-screen">
+      <div className="flex min-h-screen flex-col">
+        <SiteHeader />
         <DemoBanner vehicleLabel="Örnek araç" />
-        <div className="mx-auto max-w-3xl px-4 py-12 sm:px-6">
-          <div
-            role="alert"
-            className="rounded-lg border border-destructive/40 bg-destructive/5 p-6 text-sm"
-          >
-            <p className="font-medium text-destructive">Demo aracı şu an yüklenemedi</p>
-            <p className="mt-1 text-muted-foreground">
-              Sayfayı tekrar açmayı deneyin. Sorun sürerse{" "}
-              <a className="underline" href="mailto:destek@sase.tr">
-                destek@sase.tr
-              </a>
-              .
-            </p>
+        <main className="flex-1">
+          <div className="mx-auto max-w-3xl px-4 py-12 sm:px-6">
+            <div
+              role="alert"
+              className="rounded-lg border border-destructive/40 bg-destructive/5 p-6 text-sm"
+            >
+              <p className="font-medium text-destructive">Demo aracı şu an yüklenemedi</p>
+              <p className="mt-1 text-muted-foreground">
+                Sayfayı tekrar açmayı deneyin. Sorun sürerse{" "}
+                <a className="underline" href="mailto:destek@sase.tr">
+                  destek@sase.tr
+                </a>
+                .
+              </p>
+            </div>
           </div>
-        </div>
+        </main>
+        <SiteFooter />
       </div>
     );
   }
 
   return (
-    <div className="min-h-screen">
+    <div className="flex min-h-screen flex-col">
+      <SiteHeader />
       <DemoBanner vehicleLabel={vehicleLabel} />
 
-      <main className="mx-auto max-w-7xl px-4 py-6 sm:px-6 sm:py-8">
+      <main className="mx-auto w-full max-w-7xl flex-1 px-4 py-6 sm:px-6 sm:py-8">
         {/* Vehicle header */}
         <div className="mb-6">
           {vehicleLoading ? (
@@ -133,32 +141,9 @@ function DemoVehiclePage() {
           </CardContent>
         </Card>
 
-        {/* Footer CTA — second conversion surface after browsing. Mobile layout
-            stacks (col) with full-width button; Chatwoot widget sits in the
-            bottom-right so we leave breathing room and keep the CTA above it
-            with `mb-20` on mobile. */}
-        <div className="mb-20 mt-8 flex flex-col items-start gap-3 rounded-lg border border-border bg-muted/30 p-5 sm:mb-0 sm:flex-row sm:items-center sm:justify-between">
-          <div>
-            <p className="text-sm font-semibold">Sınırsız şase sorgulamak için ücretsiz hesap aç</p>
-            <p className="mt-0.5 text-xs text-muted-foreground">
-              Kart bilgisi gerekmez · 30 gün ücretsiz · istediğin an iptal
-            </p>
-          </div>
-          <Button
-            asChild
-            className="w-full shrink-0 sm:w-auto"
-            data-faro-user-action-name="demo-footer-signup"
-          >
-            <Link
-              to="/register"
-              onClick={() => capture("demo_to_register_click", { source: "footer" })}
-            >
-              Hesap Aç
-              <ArrowRight className="ml-1 h-4 w-4" />
-            </Link>
-          </Button>
-        </div>
+        <DemoFooterCta source="footer" />
       </main>
+      <SiteFooter />
     </div>
   );
 }

apps/web/src/routes/demo_/categories_/$categoryId.tsx

@@ -1,5 +1,8 @@
 import { DemoBanner } from "@/components/demo/demo-banner";
+import { DemoFooterCta } from "@/components/demo/demo-footer-cta";
 import { SchemaViewer } from "@/components/schema/schema-viewer";
+import { SiteFooter } from "@/components/site-footer";
+import { SiteHeader } from "@/components/site-header";
 import { usePageMeta } from "@/hooks/use-page-meta";
 import type { CategorySchema } from "@/hooks/use-parts";
 import { api } from "@/lib/api-client";
@@ -76,10 +79,11 @@ function DemoCategoryPage() {
   };
 
   return (
-    <div className="min-h-screen">
+    <div className="flex min-h-screen flex-col">
+      <SiteHeader />
       <DemoBanner vehicleLabel={vehicleLabel} />
 
-      <main className="mx-auto max-w-7xl space-y-4 px-4 py-6 sm:px-6 sm:py-8">
+      <main className="mx-auto w-full max-w-7xl flex-1 space-y-4 px-4 py-6 sm:px-6 sm:py-8">
         {/* Breadcrumb (inline — demo routes) */}
         <DemoBreadcrumb
           vehicleLabel={vehicleLabel}
@@ -189,25 +193,9 @@ function DemoCategoryPage() {
             </Suspense>
           ))}
 
-        {/* Footer CTA — present on every leaf so the conversion path is always
-            one click away after the user has just had an "aha" moment. Mobile
-            layout stacks with a full-width button and clears the Chatwoot
-            widget that sits in the bottom-right (`mb-20` on mobile). */}
-        {data && !data.loadError && (
-          <div className="mb-20 mt-6 flex flex-col items-start gap-3 rounded-lg border border-border bg-muted/30 p-5 sm:mb-0 sm:flex-row sm:items-center sm:justify-between">
-            <p className="text-sm font-semibold">Sınırsız şase sorgulamak için ücretsiz hesap aç</p>
-            <Button asChild className="w-full shrink-0 sm:w-auto">
-              <Link
-                to="/register"
-                onClick={() => capture("demo_to_register_click", { source: "category_footer" })}
-              >
-                Hesap Aç
-                <ArrowRight className="ml-1 h-4 w-4" />
-              </Link>
-            </Button>
-          </div>
-        )}
+        {data && !data.loadError && <DemoFooterCta source="category_footer" />}
       </main>
+      <SiteFooter />
     </div>
   );
 }