Release v0.3.1

- Feed bounded context with DDD implementation (Phases 1-5)
- Domain event handlers for cross-context coordination
- Fix Blossom media upload setting persistence
- Fix wallet connection persistence on page reload
- New branding assets and icons
- Vitest testing infrastructure with 151 domain model tests
- Help page scaffolding
- Keyboard navigation provider

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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