fix: handle text+bytes in terminal WS; mkdir -p before SFTP upload; robust conda path detection

backend/ssh_client.py

@@ -66,15 +66,24 @@ class SSHClient:
                 self.connected = False
                 break
 
+    def _conda_activate_cmd(self) -> str:
+        candidates = [
+            f"/home/{self.username}/miniconda3/etc/profile.d/conda.sh",
+            f"/home/{self.username}/miniforge3/etc/profile.d/conda.sh",
+            f"/home/{self.username}/anaconda3/etc/profile.d/conda.sh",
+            "/opt/conda/etc/profile.d/conda.sh",
+        ]
+        checks = " || ".join(
+            f'[ -f "{p}" ] && source "{p}"' for p in candidates
+        )
+        return f'( {checks} ) 2>/dev/null; conda activate synthetic-data 2>/dev/null'
+
     def execute(self, command: str, use_conda: bool = True) -> tuple:
         if not self.is_connected():
             raise Exception("Not connected to SSH server")
 
         if use_conda:
-            full_cmd = (
+            full_cmd = f"{self._conda_activate_cmd()} && {command}"
-                f"source /home/{self.username}/miniconda3/etc/profile.d/conda.sh && "
-                f"conda activate synthetic-data && {command}"
-            )
         else:
             full_cmd = command
 
@@ -90,10 +99,7 @@ class SSHClient:
             raise Exception("Not connected to SSH server")
 
         if use_conda:
-            full_cmd = (
+            full_cmd = f"{self._conda_activate_cmd()} && {command}"
-                f"source /home/{self.username}/miniconda3/etc/profile.d/conda.sh && "
-                f"conda activate synthetic-data && {command}"
-            )
         else:
             full_cmd = command
 
@@ -131,17 +137,14 @@ class SSHClient:
         channel.get_pty(term=term, width=width, height=height)
         channel.invoke_shell()
 
-        # Auto-activate conda env
+        channel.send(self._conda_activate_cmd() + "\n")
-        activate = (
-            f"source /home/{self.username}/miniconda3/etc/profile.d/conda.sh && "
-            f"conda activate synthetic-data\n"
-        )
-        channel.send(activate)
         return channel
 
     def upload_file(self, local_path: str, remote_path: str):
         if not self.is_connected():
             raise Exception("Not connected to SSH server")
+        remote_dir = remote_path.rsplit("/", 1)[0]
+        self.execute(f"mkdir -p '{remote_dir}'", use_conda=False)
         sftp = self.client.open_sftp()
         try:
             sftp.put(local_path, remote_path)