fix: remove stty -echo line, sync tangle

org/channel-tui-main.org

@@ -910,7 +910,7 @@ Event handlers + daemon I/O + main loop.
         ;; breaks read on fd 0 in this SBCL environment, but -echo alone
         ;; works. A cat subprocess inherits the terminal and provides
         ;; bytes through a pipe that SBCL reads reliably.
-        (uiop:run-program '("stty" "-echo") :output nil :ignore-error-status t)
+         ;; A cat subprocess reads keyboard input from the terminal.
          (let* ((cat-proc (uiop:launch-program '("stdbuf" "-o0" "cat")
                                               :output :stream
                                               :input :interactive