Rebrand to GlitchCraft with IPv6 support

Changes:
- Renamed from "Text Corruptor" to "GlitchCraft"
- New slogan: "Artisanal text corruption, served fresh!"
- Updated server to support both IPv4 and IPv6 (dual-stack)
- Server now listens on all interfaces (::) instead of just localhost
- Updated all references in code and documentation

The new name reflects both the glitch aesthetic and the craftsmanship
of creating beautifully corrupted text, with a playful tone.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/sw.js

@@ -1,9 +1,9 @@
 /**
- * Service Worker for Text Corruptor PWA
+ * Service Worker for GlitchCraft PWA
  * Enables offline functionality and caching
  */
 
-const CACHE_NAME = 'text-corruptor-v1';
+const CACHE_NAME = 'glitchcraft-v1';
 const urlsToCache = ['/', '/index.html', '/styles.css', '/zalgo.js', '/app.js', '/manifest.json'];
 
 // Install event - cache essential files