feat: landing page CRO revision, demo page, auto-trial, multi-catalog messaging

- Rewrite landing page copy with Jobs-to-be-Done and loss framing
- Add VIN live preview via backend pl24+emex decode chain
- Add comparison table (mobile-responsive), stats, pricing teaser, referral banner
- Replace testimonials with aggregate social proof stats
- Create demo page with 3-step VIN decode flow for unregistered users
- Add public /vehicles/preview/:vin endpoint (no auth required)
- Auto-create 7-day trial subscription on user registration
- Highlight multi-catalog cross-querying advantage in OEM feature and comparison
- Update register page with trial messaging and VIN param support

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/src/subscriptions/subscriptions.service.ts

@@ -5,7 +5,7 @@ import {
   Injectable,
   NotFoundException,
 } from "@nestjs/common";
-import { eq, and, desc } from "drizzle-orm";
+import { eq, and, desc, or, inArray } from "drizzle-orm";
 import { DATABASE, Database } from "../database/database.provider";
 import { userSubscriptions, userBrands, plans, brands } from "../database/schema/core";
 
@@ -25,6 +25,12 @@ export class SubscriptionsService {
       throw new ConflictException("Already have an active subscription");
     }
 
+    // Expire any existing trial subscription
+    await this.db
+      .update(userSubscriptions)
+      .set({ status: "expired", updatedAt: new Date() })
+      .where(and(eq(userSubscriptions.userId, userId), eq(userSubscriptions.status, "trial")));
+
     // Validate plan
     const plan = await this.db.select().from(plans).where(eq(plans.id, data.planId)).limit(1);
     if (plan.length === 0) throw new NotFoundException("Plan not found");
@@ -198,7 +204,12 @@ export class SubscriptionsService {
     const [sub] = await this.db
       .select()
       .from(userSubscriptions)
-      .where(and(eq(userSubscriptions.userId, userId), eq(userSubscriptions.status, "active")))
+      .where(
+        and(
+          eq(userSubscriptions.userId, userId),
+          or(eq(userSubscriptions.status, "active"), eq(userSubscriptions.status, "trial")),
+        ),
+      )
       .limit(1);
 
     if (!sub || !sub.endDate) return;