fix(analytics,ui): remove duplicate contact conversion and add brand identity to homepage hero

- Remove redundant `trackConversion('contact_form_submission')` in contact-content-v3.tsx
  and rely on `trackContactForm(..., true)` to avoid double-counting conversions in GA4
- Update contact-content-v3.test.tsx assertions to match single analytics call
- Add Logo + company name + NOVALON to homepage HeroSection in home-content-v14.tsx
- Update homepage visual regression baselines across desktop/tablet/mobile
- Record progress in README.md

src/app/(marketing)/home-content-v14.tsx

@@ -1,12 +1,14 @@
 'use client';
 
 import { useRef } from 'react';
+import Image from 'next/image';
 import { motion } from 'framer-motion';
 import { ScrollReveal, StaggerReveal } from '@/components/ui/scroll-reveal';
 import { Badge } from '@/components/ui/badge';
 import { ArrowRight, Lightbulb, Database, Layers } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { EASE_OUT } from '@/components/ui/page-decoration';
+import { COMPANY_INFO } from '@/lib/constants';
 
 // ===== 服务数据降级兜底 =====
 const FALLBACK_SERVICES = [
@@ -104,6 +106,31 @@ function HeroSection({ heroData, stats }: {
 
       <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10 w-full py-24 sm:py-32 md:py-40 lg:py-48">
         <div className="max-w-4xl">
+          {/* 品牌标识：Logo + 公司名 */}
+          <motion.div
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.6, delay: 0, ease: EASE_OUT }}
+            className="flex items-center gap-3 mb-8"
+          >
+            <Image
+              src="/logo.svg"
+              alt={`${COMPANY_INFO.name} Logo`}
+              width={48}
+              height={48}
+              className="h-10 w-auto sm:h-12"
+              priority
+            />
+            <div className="flex flex-col">
+              <span className="text-sm sm:text-base font-semibold text-ink leading-tight">
+                {COMPANY_INFO.name}
+              </span>
+              <span className="text-[10px] sm:text-xs tracking-[0.2em] text-text-muted uppercase">
+                NOVALON
+              </span>
+            </div>
+          </motion.div>
+
           {/* 主标题：大胆、直接 */}
           <motion.h1
             initial={{ opacity: 0, y: 40 }}