fix: load Google Fonts correctly with strict CSP (#77)

## Summary

- Allows `fonts.googleapis.com` in `style-src` and `fonts.gstatic.com` in `font-src` so the browser can load Google Fonts
- Adds preconnect hints and the Google Fonts import (Griffy, Kalam, Creepster, Henny Penny) to `index.html`
- Sets the body font to Kalam and heading font to Griffy, with utility classes for Creepster and Henny Penny
- Disables Angular's `inlineCritical` optimisation, which was causing the stylesheet to be deferred via `onload="this.media='all'"` — an inline event handler blocked by the strict `script-src` CSP, preventing the heading font rules from ever applying to screen media

## Test plan

- [ ] Rebuild and reload the app
- [ ] Verify headings render in Griffy
- [ ] Verify body text renders in Kalam
- [ ] Check DevTools Styles tab confirms the `h1-h6` font-family rule is matched

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #77
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

apps/frontend/src/index.html

@@ -8,6 +8,9 @@
     <meta name="description" content="Naomi's curated collection of games, books, music, shows, manga, and art. Browse, engage, and suggest new additions!" />
     <meta name="theme-color" content="#9d4edd" />
     <link rel="icon" type="image/x-icon" href="favicon.ico" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link href="https://fonts.googleapis.com/css2?family=Creepster&family=Griffy&family=Henny+Penny&family=Kalam:wght@300;400;700&display=swap" rel="stylesheet" />
     <script defer src="https://analytics.nhcarrigan.com/js/pa-YUXAn1vhhRttySUAw_LMN.js"></script>
     <script>
       window.plausible=window.plausible||function(){(plausible.q=plausible.q||[]).push(arguments)},plausible.init=plausible.init||function(i){plausible.o=i||{}};