feat(desktop): Esc closes every OverlayView-based overlay

Lift the keyboard handler into the shared OverlayView so Agents, Settings,
Command Center — and anything we build on top of it later — all dismiss on
Esc by default. Nested Radix dialogs stop propagation themselves, so a
modal opened inside an overlay (e.g. model picker inside Settings) still
closes the modal first, not the overlay underneath.

Drop the now-redundant Esc handlers in Settings (kept Cmd/Ctrl+P) and
Command Center.

apps/desktop/src/app/command-center/index.tsx

@@ -31,7 +31,6 @@ import type {
   StatusResponse
 } from '@/hermes'
 import { sessionTitle } from '@/lib/chat-runtime'
-import { triggerHaptic } from '@/lib/haptics'
 import { Activity, AlertCircle, Cpu, Pin } from '@/lib/icons'
 import { exportSession } from '@/lib/session-export'
 import { cn } from '@/lib/utils'
@@ -330,20 +329,6 @@ export function CommandCenterView({
     }
   }, [])
 
-  useEffect(() => {
-    const onKeyDown = (event: KeyboardEvent) => {
-      if (event.key === 'Escape') {
-        event.preventDefault()
-        triggerHaptic('close')
-        onClose()
-      }
-    }
-
-    window.addEventListener('keydown', onKeyDown)
-
-    return () => window.removeEventListener('keydown', onKeyDown)
-  }, [onClose])
-
   useEffect(() => {
     if (!debouncedQuery) {
       setSearchGroups([])

apps/desktop/src/app/overlays/overlay-view.tsx

@@ -1,4 +1,4 @@
-import type { ReactNode } from 'react'
+import { type ReactNode, useEffect } from 'react'
 
 import { Button } from '@/components/ui/button'
 import { triggerHaptic } from '@/lib/haptics'
@@ -27,6 +27,23 @@ export function OverlayView({
     onClose()
   }
 
+  // Esc dismisses every OverlayView-based overlay. Nested Radix dialogs
+  // stop propagation themselves, so opening (e.g.) the model picker inside
+  // Settings still closes the picker first instead of the underlying overlay.
+  useEffect(() => {
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key !== 'Escape' || event.defaultPrevented) return
+
+      event.preventDefault()
+      triggerHaptic('close')
+      onClose()
+    }
+
+    window.addEventListener('keydown', onKeyDown)
+
+    return () => window.removeEventListener('keydown', onKeyDown)
+  }, [onClose])
+
   return (
     <div
       className="fixed inset-0 z-50 bg-black/22 p-3 backdrop-blur-[2px] sm:p-8"

apps/desktop/src/app/settings/index.tsx

@@ -80,16 +80,9 @@ export function SettingsView({ gateway, onClose, onConfigSaved }: SettingsPagePr
     }
   }
 
+  // OverlayView handles Esc; this just adds Cmd/Ctrl+P → focus search.
   useEffect(() => {
     const onKeyDown = (e: KeyboardEvent) => {
-      if (e.key === 'Escape') {
-        e.preventDefault()
-        triggerHaptic('close')
-        onClose()
-
-        return
-      }
-
       if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === 'p') {
         e.preventDefault()
         searchInputRef.current?.focus()
@@ -100,7 +93,7 @@ export function SettingsView({ gateway, onClose, onConfigSaved }: SettingsPagePr
     window.addEventListener('keydown', onKeyDown)
 
     return () => window.removeEventListener('keydown', onKeyDown)
-  }, [onClose])
+  }, [])
 
   return (
     <OverlayView