feat: rebuild landing page from new Figma design (node 9505:537)

Complete redesign with 9 sections matching the updated 1920px layout:
- Header: sticky nav with globe/language toggle and Download CTA
- Hero: warm beige bg, iPhone mockup, "A Modern Way to Stay Connected"
- WhyTalkPro: 2x2 card grid with SVG icons and illustration
- CoreSystem: halftone bg, 6-card feature grid with 3D icons
- Experience: 3 vertical screenshot cards with exact Figma clip positions
- UseCases: split layout with 4 orange-header rows
- Trust: 4-column reliability features with sprite clipping and SVG dividers
- AppPreview: interactive phone carousel with prev/next fade transition
- DownloadCTA: polka-dot bg, TalkPro logo script, store badges
- Footer: logo, description, store badges, link columns

All 35 Figma assets downloaded locally (SVGs correctly named .svg).

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

public/assets/footer-apple-icon.svg

@@ -0,0 +1,6 @@
+<svg preserveAspectRatio="none" width="100%" height="100%" overflow="visible" style="display: block;" viewBox="0 0 22.0004 26.9856" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g id="Group">
+<path id="Vector" d="M16.1918 0C16.2546 0 16.3174 0 16.3838 0C16.5378 1.90308 15.8115 3.32506 14.9286 4.35481C14.0624 5.37746 12.8762 6.36929 10.9578 6.21879C10.8298 4.34297 11.5574 3.02645 12.439 1.99907C13.2566 1.0416 14.7556 0.189597 16.1918 0Z" fill="var(--fill-0, white)"/>
+<path id="Vector_2" d="M22.0004 19.8082C22.0004 19.8271 22.0004 19.8437 22.0004 19.8615C21.4612 21.4944 20.6922 22.8939 19.7537 24.1926C18.8969 25.3717 17.847 26.9584 15.9724 26.9584C14.3525 26.9584 13.2766 25.9168 11.6164 25.8883C9.86025 25.8599 8.89449 26.7593 7.28883 26.9856C7.10516 26.9856 6.92149 26.9856 6.74137 26.9856C5.56231 26.815 4.61077 25.8812 3.91756 25.0399C1.87346 22.5538 0.293876 19.3425 0 15.233C0 14.8301 0 14.4284 0 14.0255C0.124423 11.0843 1.55351 8.69304 3.45304 7.53413C4.45554 6.91794 5.83367 6.39299 7.36823 6.62762C8.02589 6.72953 8.69778 6.95467 9.28672 7.17745C9.84484 7.39193 10.5428 7.77231 11.204 7.75217C11.6519 7.73913 12.0975 7.50569 12.549 7.34098C13.8714 6.86343 15.1678 6.31597 16.8765 6.57311C18.9301 6.88357 20.3876 7.79601 21.2882 9.20377C19.551 10.3094 18.1776 11.9754 18.4123 14.8206C18.6208 17.405 20.1234 18.9171 22.0004 19.8082Z" fill="var(--fill-0, white)"/>
+</g>
+</svg>