feat: Add code sommelier with settings toggle

[gustafeden]

Summary

Wine-tasting style commentary for code snippets using Claude Haiku. Disabled by default, can be enabled in settings.

Stacked on PR #5 (feature/haiku-core-clean)

What's Included

New Files

• lib/services/vide_settings.dart - Settings manager singleton
• lib/modules/settings/vide_settings_page.dart - Settings UI page

Modified Files

• lib/main.dart - Load settings at startup
• lib/modules/haiku/message_enhancement_service.dart - Enable sommelier with settings check
• lib/modules/agent_network/network_execution_page.dart - Sommelier UI + integration

User-Visible Behavior

1. When enabled in settings, pasting code triggers wine-tasting commentary
2. Commentary appears in magenta italic text with 🍷 prefix
3. Auto-clears after 30 seconds
4. Examples:
   • "Notes of copy-pasted Stack Overflow with a 2019 vintage finish—pairs well with regret."
   • "A bold oaky aroma of 'written at 3am' with undertones of deadline panic."

Test Plan

• Enable sommelier in settings
• Paste code snippet, verify commentary appears
• Verify commentary auto-clears after 30 seconds
• Verify disabled by default

🤖 Generated with Claude Code