Update extension system and database migrations

Changes:
- Added CLAUDE.md with project instructions
- Updated extension manifest bindings (TypeScript)
- Regenerated database migrations (consolidated into single migration)
- Updated haex schema with table name handling
- Enhanced extension manager and manifest handling in Rust
- Updated extension store in frontend
- Updated vault.db

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

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

src/stores/extensions/index.ts

@@ -50,7 +50,7 @@ export const useExtensionsStore = defineStore('extensionsStore', () => {
       currentExtension.value.publicKey,
       currentExtension.value.name,
       currentExtension.value.version,
-      'index.html',
+      currentExtension.value.entry ?? 'index.html',
       currentExtension.value.devServerUrl ?? undefined,
     )
   })