openidea's 'Go to Declaration' functionality via keyboard shortcut

This issue reports a critical usability defect in `openidea`: the `ctrl+B` shortcut for 'Go to Declaration' is non-functional, despite the feature working via the right-click context menu. This directly contradicts the project's positioning of offering an 'IntelliJ IDEA-style keymap,' a core expectation for developers accustomed to efficient navigation. Keyboard shortcuts are fundamental to IDE productivity; their failure forces users into slower, mouse-driven workflows, eroding the 'fast native app' promise. While the underlying code insight works, the broken shortcut represents a significant friction point for Rust developers, impacting daily workflow efficiency. Prioritizing the restoration of standard keymap functionality is essential for `openidea` to deliver on its promise of a high-productivity, native development experience.