chore(tui): replace koffi with Windows VT input helper

closes #4480

packages/coding-agent/npm-shrinkwrap.json

@@ -516,9 +516,6 @@
 				"get-east-asian-width": "1.6.0",
 				"marked": "15.0.12"
 			},
-			"optionalDependencies": {
-				"koffi": "2.16.2"
-			},
 			"engines": {
 				"node": ">=22.19.0"
 			}
@@ -1369,17 +1366,6 @@
 				"safe-buffer": "^5.0.1"
 			}
 		},
-		"node_modules/koffi": {
-			"version": "2.16.2",
-			"resolved": "https://registry.npmjs.org/koffi/-/koffi-2.16.2.tgz",
-			"integrity": "sha512-owU0MRwv6xkrVqCd+33uw6BaYppkTRXbO/rVdJNI2dvZG0gzyRhYwW25eWtc5pauwK8TGh3AbkFONSezdykfSA==",
-			"license": "MIT",
-			"optional": true,
-			"hasInstallScript": true,
-			"funding": {
-				"url": "https://liberapay.com/Koromix"
-			}
-		},
 		"node_modules/long": {
 			"version": "5.3.2",
 			"resolved": "https://registry.npmjs.org/long/-/long-5.3.2.tgz",