feat(feature-suggestions): implement feature suggestions and spec regeneration functionality

- Introduced a new `FeatureSuggestionsService` to analyze projects and generate feature suggestions based on the project structure and existing features.
- Added IPC handlers for generating and stopping feature suggestions, as well as checking their status.
- Implemented a `SpecRegenerationService` to create and regenerate application specifications based on user-defined project overviews and definitions.
- Enhanced the UI with a `FeatureSuggestionsDialog` for displaying generated suggestions and allowing users to import them into their project.
- Updated the sidebar and board view components to integrate feature suggestions and spec regeneration functionalities, improving project management capabilities.

These changes significantly enhance the application's ability to assist users in feature planning and specification management.

app/src/hooks/use-keyboard-shortcuts.ts

@@ -102,7 +102,7 @@ export function useKeyboardShortcuts(shortcuts: KeyboardShortcut[]) {
 export const NAV_SHORTCUTS: Record<string, string> = {
   board: "K", // K for Kanban
   agent: "A", // A for Agent
-  spec: "E", // E for Editor (Spec)
+  spec: "D", // D for Document (Spec)
   context: "C", // C for Context
   tools: "T", // T for Tools
   settings: "S", // S for Settings
@@ -121,8 +121,10 @@ export const UI_SHORTCUTS: Record<string, string> = {
 export const ACTION_SHORTCUTS: Record<string, string> = {
   addFeature: "N", // N for New feature
   addContextFile: "F", // F for File (add context file)
-  startNext: "Q", // Q for Queue (start next features from backlog)
+  startNext: "G", // G for Grab (start next features from backlog)
   newSession: "W", // W for new session (in agent view)
   openProject: "O", // O for Open project (navigate to welcome view)
   projectPicker: "P", // P for Project picker
+  cyclePrevProject: "Q", // Q for previous project (cycle back through MRU)
+  cycleNextProject: "E", // E for next project (cycle forward through MRU)
 };