feat(cli): add escape key handler to exit input modes

Pressing escape with empty input now exits current mode (usage/referral)
back to default mode. Use input mode config to control slash suggestions.

Author: brandonkachen

cli/src/chat.tsx

@@ -40,6 +40,7 @@ import { useTheme } from './hooks/use-theme'
 import { useTimeout } from './hooks/use-timeout'
 
 import { useChatStore } from './state/chat-store'
+import { getInputModeConfig } from './utils/input-modes'
 import { useFeedbackStore } from './state/feedback-store'
 import { createChatScrollAcceleration } from './utils/chat-scroll-accel'
 import { loadLocalAgents } from './utils/local-agent-registry'
@@ -885,10 +886,11 @@ export const Chat = ({
     [messages],
   )
 
+  const modeConfig = getInputModeConfig(inputMode)
   const hasSlashSuggestions =
     slashContext.active &&
     slashSuggestionItems.length > 0 &&
-    inputMode === 'default'
+    !modeConfig.disableSlashSuggestions
   const hasMentionSuggestions =
     !slashContext.active &&
     mentionContext.active &&

cli/src/hooks/use-keyboard-handlers.ts

@@ -1,6 +1,8 @@
 import { useKeyboard } from '@opentui/react'
 import { useCallback } from 'react'
 
+import { useChatStore } from '../state/chat-store'
+
 type InputHandle = { focus: () => void }
 
 interface KeyboardHandlersConfig {
@@ -62,6 +64,21 @@ export const useKeyboardHandlers = ({
           return
         }
 
+        // Handle escape with empty input: exit current mode if not default
+        if (isEscape && !isStreaming && !isWaitingForResponse && !inputValue.trim()) {
+          const { inputMode, setInputMode } = useChatStore.getState()
+          if (inputMode !== 'default') {
+            if (
+              'preventDefault' in key &&
+              typeof key.preventDefault === 'function'
+            ) {
+              key.preventDefault()
+            }
+            setInputMode('default')
+            return
+          }
+        }
+
         if ((isEscape || isCtrlC) && (isStreaming || isWaitingForResponse)) {
           if (
             'preventDefault' in key &&