T18 round 2 fixes: a folder the terminal cannot enter stops the start, and links read combining clusters whole

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Cargo.toml

@@ -39,6 +39,9 @@ cocoa = "0.26"
 objc = "0.2"
 raw-window-handle = "0.6"
 
+[target.'cfg(unix)'.dependencies]
+rustix = { version = "1", default-features = false, features = ["std", "fs"] }
+
 [dev-dependencies]
 env_logger = "0.11"