fix: conversion audit — fix all broken CTAs, wrong data claims, hero rewrite

CRITICAL:
- Fix broken mailto: CTAs on /offer and /proposal (empty href!)
- Fix 97.4% channel dependency claim → actual 85% (verified from DB)
- Fix 37.3% repeat rate → 57.6% cohort return rate (verified)
- Fix revenue model payback math (was 2.6mo, actual 3.5mo at 100/mo)
- Fix cost-of-waiting claim with verifiable math

CONVERSION:
- Hero rewrite: 'Lost 84% of new customers' → client problem, not tech brag
- Nav: remove duplicate Proposal link, single 'The Proposal' → /offer
- Footer CTA: primary action is now 'See the Full Proposal'
- All CTAs now include properly formatted mailto with subject+body
- Replace unverified competitor claim with specific named competitors

DATA INTEGRITY:
- 15/23 claims verified SOURCE-LINKED from PostgreSQL (728K orders)
- 4 claims corrected (97.4%→85%, 37.3%→57.6%, payback, cost-of-waiting)
- Revenue calculator uses cohort-verified return rate
- Board summary updated with correct figures

templates/index.html

@@ -16,9 +16,8 @@
     <a href="/" class="logo">JustVitamins <span class="x">×</span> QuikCue</a>
     <div class="nav-links">
       <a href="/dashboard" target="_blank">📊 Dashboard</a>
-      <a href="#demos">Demos</a>
-      <a href="/proposal" target="_blank">Proposal</a>
-      <a href="/offer" target="_blank">Offer</a>
+      <a href="#demo-a">Demos</a>
+      <a href="/offer" target="_blank">📋 The Proposal</a>
     </div>
   </div>
 </nav>
@@ -27,14 +26,13 @@
 
 <!-- ═══ HERO ═══ -->
 <section class="hero" id="top">
-  <div class="eyebrow"><span class="pill">● LIVE</span> AI Content Engine — Powered by Gemini</div>
-  <h1>Your content engine is<br><span class="gr">real and running.</span></h1>
-  <p class="sub">Paste any Just Vitamins product link. The AI scrapes it live, rewrites every word, generates new product images, and builds a full marketing pack — all in seconds. <strong>No mocks. No fakes. Try it.</strong></p>
+  <div class="eyebrow"><span class="pill">● LIVE</span> Built for Just Vitamins — Powered by Gemini</div>
+  <h1>You've lost 84% of new customers since 2020.<br><span class="gr">This engine gets them back.</span></h1>
+  <p class="sub">We analysed your 728,018 orders. The product isn't the problem — <strong>discovery is.</strong> Below is a working AI content engine that scrapes your products live, generates conversion-optimised PDPs, images, and marketing assets. Try it. Then <a href="/offer" style="color:var(--accent)">see the proposal</a>.</p>
   <div class="btn-row">
-    <a href="#demo-a" class="btn cta">⚡ Try Demo A — 12 Assets</a>
-    <a href="#demo-b" class="btn ghost">🔍 Competitor X-Ray</a>
-    <a href="#demo-c" class="btn ghost">🎨 PDP Surgeon</a>
-    <a href="/dashboard" target="_blank" class="btn outline">📊 Real Data Dashboard</a>
+    <a href="#demo-a" class="btn cta">⚡ See It Work — Live Demo</a>
+    <a href="/offer" class="btn ghost">📋 See the Proposal</a>
+    <a href="/dashboard" target="_blank" class="btn outline">📊 Your Data Dashboard</a>
   </div>
   <div class="stats">
     <div class="stat"><span class="val">£19.4M</span><span class="lbl">Lifetime Revenue</span></div>
@@ -135,11 +133,11 @@
 <!-- ═══ CTA ═══ -->
 <section class="cta-section" id="cta">
   <h2>This isn't a mockup.<br>It's <span class="gr">running right now.</span></h2>
-  <p class="sub" style="text-align:center;margin:0 auto 2rem">Every demo on this page hits a real API, scrapes real pages, and generates real content. The data dashboard shows real £19.4M in revenue across 728,000 orders.</p>
+  <p class="sub" style="text-align:center;margin:0 auto 2rem">Every demo above hits a real API, scrapes real pages, and generates real content. Your data dashboard runs against 728,018 validated orders.</p>
   <div style="display:flex;flex-direction:column;align-items:center;gap:.75rem">
-    <a href="mailto:omair@quikcue.com?subject=JustVitamin%20AI%20Engine%20—%20Let's%20Talk" class="btn cta lg">🚀 Let's Talk — 15 min call</a>
-    <a href="/dashboard" target="_blank" class="btn outline">📊 Explore the Full Dashboard</a>
-    <span class="note">Built by <a href="https://quikcue.com">QuikCue</a> · Powered by Gemini 2.5 Flash + Nano Banana Pro</span>
+    <a href="/offer" class="btn cta lg">📋 See the Full Proposal</a>
+    <a href="mailto:omair@quikcue.com?subject=JustVitamin%20AI%20Engine%20%E2%80%94%20Let's%20Talk&body=Hi%20Omair%2C%0A%0AI've%20seen%20the%20demos.%20Let's%20schedule%20a%20call.%0A%0AThanks" class="btn outline">🚀 Let's Talk — 15 min call</a>
+    <span class="note">Built by Omair @ <a href="https://quikcue.com">QuikCue</a> · Powered by Gemini 2.5 Flash</span>
   </div>
 </section>