feat(tui): add skillsHub overlay state wiring

Extend OverlayState with a skillsHub flag, fold it into $isBlocked, and
teach Ctrl+C to close the overlay so later PRs can render the component
behind this slot.

ui-tui/src/app/interfaces.ts

@@ -57,6 +57,7 @@ export interface OverlayState {
   pager: null | PagerState
   picker: boolean
   secret: null | SecretReq
+  skillsHub: boolean
   sudo: null | SudoReq
 }
 

ui-tui/src/app/overlayStore.ts

@@ -9,13 +9,16 @@ const buildOverlayState = (): OverlayState => ({
   pager: null,
   picker: false,
   secret: null,
+  skillsHub: false,
   sudo: null
 })
 
 export const $overlayState = atom<OverlayState>(buildOverlayState())
 
-export const $isBlocked = computed($overlayState, ({ approval, clarify, modelPicker, pager, picker, secret, sudo }) =>
-  Boolean(approval || clarify || modelPicker || pager || picker || secret || sudo)
+export const $isBlocked = computed(
+  $overlayState,
+  ({ approval, clarify, modelPicker, pager, picker, secret, skillsHub, sudo }) =>
+    Boolean(approval || clarify || modelPicker || pager || picker || secret || skillsHub || sudo)
 )
 
 export const getOverlayState = () => $overlayState.get()

ui-tui/src/app/useInputHandlers.ts

@@ -63,6 +63,10 @@ export function useInputHandlers(ctx: InputHandlerContext): InputHandlerResult {
       return patchOverlayState({ modelPicker: false })
     }
 
+    if (overlay.skillsHub) {
+      return patchOverlayState({ skillsHub: false })
+    }
+
     if (overlay.picker) {
       return patchOverlayState({ picker: false })
     }