dsh-duet v0.1.4

Improve connection reliability and page-scoped voice control.

• Bind voice control and input synchronization to the page that opened the connection.
• Add daily connection-address discovery, cached recommendations, and automatic fallback.
• Load connection guidance from the service and unify connection diagnostics.
• Migrate local storage to dsh-duet while preserving existing settings.
• Expand regression coverage for routing and multi-page isolation.