fix(flomni): warn and confirm instead of crashing when fttrx1 is missing

feye_in() called umv(dev.fttrx1, ...) unconditionally, so a config
without fttrx1 crashed instead of degrading gracefully. Mirrors the
existing feye_out() guard: warn that fttrx1 can't be moved and that
skipping it risks a hardware collision on the real beamline, then ask
yesno before continuing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

csaxs_bec/bec_ipython_client/plugins/flomni/flomni_optics_mixin.py

@@ -34,7 +34,9 @@ class FlomniOpticsMixin:
         if "fttrx1" not in dev:
             if not self.OMNYTools.yesno(
                 "Device 'fttrx1' does not exist in the current config, so it "
-                "can't be moved out of the way. Continue anyway?"
+                "can't be moved out of the way. Continue anyway? WARNING: "
+                "this could cause collisions when operating on the real "
+                "beamline."
             ):
                 print("Aborting feye_out(): fttrx1 not moved.")
                 return
@@ -44,9 +46,19 @@ class FlomniOpticsMixin:
 
     def feye_in(self):
         bec.queue.next_dataset_number += 1
-        fttrx_out = self._get_user_param_safe("feyex", "fttrx_out")
-        umv(dev.fttrx1, fttrx_out)
- 
+        if "fttrx1" not in dev:
+            if not self.OMNYTools.yesno(
+                "Device 'fttrx1' does not exist in the current config, so it "
+                "can't be moved into position. Continue anyway? WARNING: "
+                "this could cause collisions when operating on the real "
+                "beamline."
+            ):
+                print("Aborting feye_in(): fttrx1 not moved.")
+                return
+        else:
+            fttrx_out = self._get_user_param_safe("feyex", "fttrx_out")
+            umv(dev.fttrx1, fttrx_out)
+
         feyex_in = self._get_user_param_safe("feyex", "in")
         feyey_in = self._get_user_param_safe("feyey", "in")