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/app.js

@@ -1,5 +1,5 @@
 /**
- * Main application logic for Text Corruptor
+ * Main application logic for GlitchCraft
  * Handles UI interactions and PWA registration
  */