chore: flatten src/ to root

ink/hooks/use-terminal-focus.ts

@@ -0,0 +1,16 @@
+import { useContext } from 'react'
+import TerminalFocusContext from '../components/TerminalFocusContext.js'
+
+/**
+ * Hook to check if the terminal has focus.
+ *
+ * Uses DECSET 1004 focus reporting - the terminal sends escape sequences
+ * when it gains or loses focus. These are handled automatically
+ * by Ink and filtered from useInput.
+ *
+ * @returns true if the terminal is focused (or focus state is unknown)
+ */
+export function useTerminalFocus(): boolean {
+  const { isTerminalFocused } = useContext(TerminalFocusContext)
+  return isTerminalFocused
+}