fix(cli): add missing shell metacharacters (\n, \r, \t, \\) to escape regex

packages/cli/src/ui/hooks/useShellCompletion.test.ts

@@ -156,6 +156,13 @@ describe('useShellCompletion utilities', () => {
       expect(escapeShellPath('normal-file.txt')).toBe('normal-file.txt');
     });
 
+    it('should escape tabs, newlines, carriage returns, and backslashes', () => {
+      expect(escapeShellPath('a\tb')).toBe('a\\\tb');
+      expect(escapeShellPath('a\nb')).toBe('a\\\nb');
+      expect(escapeShellPath('a\rb')).toBe('a\\\rb');
+      expect(escapeShellPath('a\\b')).toBe('a\\\\b');
+    });
+
     it('should handle empty string', () => {
       expect(escapeShellPath('')).toBe('');
     });

packages/cli/src/ui/hooks/useShellCompletion.ts

@@ -27,7 +27,7 @@ const FS_COMPLETION_DEBOUNCE_MS = 50;
 // On Unix, backslash-quote shell metacharacters (spaces, parens, etc.).
 // On Windows, cmd.exe doesn't use backslash-quoting and `\` is the path
 // separator, so we leave the path as-is.
-const UNIX_SHELL_SPECIAL_CHARS = /[ '"()&|;<>!#$`{}[\]*?]/g;
+const UNIX_SHELL_SPECIAL_CHARS = /[ \t\n\r'"()&|;<>!#$`{}[\]*?\\]/g;
 
 /**
  * Escapes special shell characters in a path segment.