fix(daytona): don't guess /root on cwd probe failure, keep constructor default; update tests to reflect this

Signed-off-by: rovle <lovre.pesut@gmail.com>

tests/tools/test_daytona_environment.py

@@ -115,15 +115,15 @@ class TestCwdResolution:
         env = make_env(cwd="/workspace", home_dir="/root")
         assert env.cwd == "/workspace"
 
-    def test_home_detection_failure_falls_back_to_root(self, make_env):
+    def test_home_detection_failure_keeps_default_cwd(self, make_env):
         sb = _make_sandbox()
         sb.process.exec.side_effect = RuntimeError("exec failed")
         env = make_env(sandbox=sb)
-        assert env.cwd == "/root"
+        assert env.cwd == "/home/daytona"  # keeps constructor default
 
-    def test_empty_home_falls_back_to_root(self, make_env):
+    def test_empty_home_keeps_default_cwd(self, make_env):
         env = make_env(home_dir="")
-        assert env.cwd == "/root"
+        assert env.cwd == "/home/daytona"  # keeps constructor default
 
 
 # ---------------------------------------------------------------------------

tools/environments/daytona.py

@@ -98,9 +98,10 @@ class DaytonaEnvironment(BaseEnvironment):
         if self._requested_cwd in ("~", "/home/daytona"):
             try:
                 home = self._sandbox.process.exec("echo $HOME").result.strip()
-                self.cwd = home or "/root"
+                if home:
+                    self.cwd = home
             except Exception:
-                self.cwd = "/root"
+                pass  # leave cwd as-is; sandbox will use its own default
             logger.info("Daytona: resolved cwd to %s", self.cwd)
 
     def _ensure_sandbox_ready(self):