chore: clean up debugging logs and console prints

Frontend:
- Remove 18 console.log/warn/error statements from terminal.tsx
- Remove console.warn from icon.tsx

Backend:
- Downgrade routine logger.info to logger.debug in tool_instances.py, terminal.py,
  terminal_session.py, terminal_manager.py, auth.py, docker_build.py, clone.py,
  config_profiles.py, user_config.py
- Keep important lifecycle events as logger.info:
  * Instance creation, start, running state
  * Docker build success/failure
  * Terminal session creation and reset
  * Auth success and user creation
  * Readiness probe success
  * Tunnel creation/stop

apps/api/src/services/terminal_session.py

@@ -60,12 +60,12 @@ class TerminalSession:
         
         # Set the terminal size initially
         self._set_terminal_size(self._cols, self._rows)
-        logger.info(f"Starting terminal session {self.session_id} for container {self.container_id} with initial size {self._cols}x{self._rows}")
+        logger.debug(f"Starting terminal session {self.session_id} for container {self.container_id} with initial size {self._cols}x{self._rows}")
         
         # Build the shell command
         if startup_command:
             shell_cmd = f'bash -c "{startup_command}" || true; exec bash -il'
-            logger.info(f"Using startup command for session {self.session_id}: {startup_command}")
+            logger.debug(f"Using startup command for session {self.session_id}: {startup_command}")
         else:
             shell_cmd = "bash -il"
         
@@ -102,7 +102,7 @@ class TerminalSession:
         size = struct.pack('HHHH', rows, cols, 0, 0)
         try:
             fcntl.ioctl(self._master_fd, TIOCSWINSZ, size)
-            logger.info(f"Resized PTY to {cols}x{rows} (fd={self._master_fd})")
+            logger.debug(f"Resized PTY to {cols}x{rows} (fd={self._master_fd})")
         except (OSError, IOError) as e:
             logger.error(f"Failed to resize PTY: {e}")
 
@@ -159,7 +159,7 @@ class TerminalSession:
             
         self._cols = cols
         self._rows = rows
-        logger.info(f"resize() called for session {self.session_id}: {cols}x{rows}")
+        logger.debug(f"resize() called for session {self.session_id}: {cols}x{rows}")
         self._set_terminal_size(cols, rows)
         
         # Docker exec -it creates its own PTY inside the container,