fix: improve terminal resize with better stty command and logging

apps/api/src/services/terminal_session.py

@@ -145,38 +145,27 @@ class TerminalSession:
         
         # Only resize if dimensions actually changed
         if cols == self._cols and rows == self._rows:
+            logger.info(f"resize() skipped for session {self.session_id}: already {cols}x{rows}")
             return
             
         self._cols = cols
         self._rows = rows
         logger.info(f"resize() called for session {self.session_id}: {cols}x{rows}")
+        
+        # Set host PTY size
         self._set_terminal_size(cols, rows)
         
         # Docker exec doesn't forward PTY resize to the container process,
         # so we need to explicitly set the size inside the container shell.
         # Send on every resize so the container shell always matches the frontend.
-        # Use ANSI escape sequences to hide the command from view:
-        # - \x1b[?25l: hide cursor
-        # - \x1b[A\x1b[2K: move up and clear line
-        # - \x1b[?25h: show cursor
+        # Use stty -echo to hide command output, then re-enable echo
+        # Add small delay to ensure shell is ready to receive commands
+        await asyncio.sleep(0.1)
         stty_cmd = (
-            f"\x1b[?25lstty cols {cols} rows {rows}\n\x1b[A\x1b[2K\x1b[?25h"
+            f"stty -echo; stty cols {cols} rows {rows}; stty echo\n"
         ).encode()
         await self.write_input(stty_cmd)
-        logger.debug(f"Sent stty resize to container for session {self.session_id}: {cols}x{rows}")
-        
-        # Docker exec doesn't forward PTY resize to the container process,
-        # so we need to explicitly set the size inside the container shell.
-        # Send on every resize so the container shell always matches the frontend.
-        # Use ANSI escape sequences to hide the command from view:
-        # - \x1b[?25l: hide cursor
-        # - \x1b[A\x1b[2K: move up and clear line
-        # - \x1b[?25h: show cursor
-        stty_cmd = (
-            f"\x1b[?25lstty cols {cols} rows {rows}\n\x1b[A\x1b[2K\x1b[?25h"
-        ).encode()
-        await self.write_input(stty_cmd)
-        logger.debug(f"Sent stty resize to container for session {self.session_id}: {cols}x{rows}")
+        logger.info(f"Sent stty resize to container for session {self.session_id}: {cols}x{rows}")
 
     async def reset(self) -> None:
         """Reset the session by killing the process and clearing state."""