feat(tui): add log selection and clipboard copy functionality

Author: roll-w

Cargo.lock

@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+arboard = { version = "3.6.1", default-features = false }
 axum = { version = "0.8.8", features = ["json", "macros"] }
 crossterm = "0.29.0"
 ratatui = { version = "0.29.0", default-features = false, features = ["crossterm"] }

Cargo.toml

@@ -127,14 +127,14 @@ fn ensure_single_command(input: &str) -> Result<(), CommandParseError> {
             continue;
         }
 
-        if in_single_quote || in_double_quote {
-            continue;
-        }
-
         if ch == ';' || ch == '|' || ch == '\n' || ch == '\r' {
             return Err(CommandParseError::MultipleCommandsNotAllowed);
         }
 
+        if in_single_quote || in_double_quote {
+            continue;
+        }
+
         if ch == '&' && matches!(chars.peek(), Some('&')) {
             return Err(CommandParseError::MultipleCommandsNotAllowed);
         }
@@ -182,4 +182,11 @@ mod tests {
         assert_eq!(parsed.program, "python");
         assert_eq!(parsed.args, vec!["-c", "print('a && b')"]);
     }
+
+    #[test]
+    fn rejects_newline_inside_quotes() {
+        let error = parse_command_line("python -c \"line1\nline2\"")
+            .expect_err("newline should be rejected even inside quotes");
+        assert_eq!(error, CommandParseError::MultipleCommandsNotAllowed);
+    }
 }