Fix the meta tags and SEO issues for: https://facialharmonyai.com
Current OG score: 83/100

## Issues found

- [WARNING] Description is too long (225 chars)
  Descriptions over 200 characters will be heavily truncated on most platforms. Recommended: 110-160 characters.

- [TIP] Image is 1280x720px
  Recommended size is 1200x630px for optimal display across all platforms.

- [TIP] Missing twitter:site
  Adding your X/Twitter @username helps attribute content to your account and improves brand visibility.
  Suggested fix:
  <meta name="twitter:site" content="@yourusername" />

- [TIP] Meta description is long (225 chars)
  Google typically shows 150-160 characters in search results. Content beyond that will be cut off.

- [TIP] Missing theme-color meta tag
  The theme-color meta tag customizes the browser toolbar color on mobile devices, improving the branded experience.
  Suggested fix:
  <meta name="theme-color" content="#4285f4" />

- [TIP] No SVG favicon found
  SVG favicons scale perfectly at any size and support dark mode via CSS media queries. Modern browsers support them natively.
  Suggested fix:
  <link rel="icon" type="image/svg+xml" href="/favicon.svg" />

- [TIP] Missing web app manifest
  A web app manifest (manifest.json) enables "Add to Home Screen" on Android, defines your app name, icons, and theme. Essential for PWA support.
  Suggested fix:
  <link rel="manifest" href="/site.webmanifest" />

- [TIP] HTML size is moderate (196 KB)
  The HTML document is 196 KB. While not critical, keeping HTML under 100 KB improves initial load performance.

## Current meta tags

```html
<title>AI Facial Harmony Analysis From One Photo</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<link rel="canonical" href="https://facialharmonyai.com/" />
<meta name="robots" content="index, follow" />
<!-- html lang="en" -->
<meta property="og:type" content="website" />
<meta property="og:title" content="AI Facial Harmony Analysis From One Photo" />
<meta property="og:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta property="og:url" content="https://facialharmonyai.com/" />
<meta property="og:site_name" content="FacialHarmonyAI" />
<meta property="og:locale" content="en" />
<meta property="og:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta property="og:image:width" content="1280" />
<meta property="og:image:height" content="720" />
<meta property="og:image:alt" content="FacialHarmonyAI facial harmony analysis" />
<meta property="og:title" content="AI Facial Harmony Analysis From One Photo" />
<meta property="og:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta property="og:site_name" content="FacialHarmonyAI" />
<meta property="og:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta property="og:image:width" content="1280" />
<meta property="og:image:height" content="720" />
<meta property="og:image:alt" content="FacialHarmonyAI facial analysis" />
<meta property="og:type" content="website" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="AI Facial Harmony Analysis From One Photo" />
<meta name="twitter:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta name="twitter:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta name="twitter:image:alt" content="FacialHarmonyAI facial harmony analysis" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="AI Facial Harmony Analysis From One Photo" />
<meta name="twitter:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta name="twitter:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
```

## Performance
- Response time: 76ms
- HTML size: 196 KB

## Task

Provide the corrected and complete set of meta tags for the <head> of this page that fixes all the issues above. Include HTML, Open Graph, and Twitter Card tags. If there are performance issues, suggest specific improvements.