fix(eps): use FE-PSH1-EMLS:STATE for front-end shutter state

X12SA-FE-PH1:OPEN_EPS/CLOSE_EPS no longer exist (unreachable with the machine
up). Drop them and derive the FE shutter open/closed values from
X12SA-FE-PSH1-EMLS:STATE.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LYAZk48UNnhKsnzdz7nJNR

csaxs_bec/bec_ipython_client/plugins/OMNY_shared/eps/EPS_STATUS_DESIGN.md

@@ -294,7 +294,7 @@ IP-whitelisted upload all apply unchanged.
 
 - **`--verify` on a running beamline** (this was done during shutdown). Re-run
   when the machine is up to confirm the FE photon-shutter PVs
-  (`X12SA-EPS-PH:SYSTEM`, `X12SA-FE-PH1:OPEN_EPS/CLOSE_EPS`) come back.
+  (`X12SA-EPS-PH:SYSTEM`) comes back (the FE-PH1 OPEN/CLOSE_EPS PVs were dropped; FE shutter state now comes from `X12SA-FE-PSH1-EMLS:STATE`).
 - **Cryocooler detail.** The card shows run/alarm/inhibit/heartbeat. Full
   temperature/pressure detail needs `XDS_CRYOCOOLER_OVERVIEW.ui` (a sub-template
   not yet supplied).

csaxs_bec/bec_ipython_client/plugins/OMNY_shared/eps/eps_pv_manifest.py

@@ -28,8 +28,6 @@ HOT_PVS = [
     ("X12SA-EH1-PSYS:SH-A-OK", "sh_eh1_a_ok", "EH1 shutter A OK"),
     ("X12SA-OP-PSYS:ALARM-COLLECTIVE", "psys_op_alarm", "OP PSYS collective alarm"),
     ("X12SA-EH1-PSYS:ALARM-COLLECTIVE", "psys_eh1_alarm", "EH1 PSYS collective alarm"),
-    ("X12SA-FE-PH1:OPEN_EPS", "fe_ph1_open", "FE photon shutter open"),
-    ("X12SA-FE-PH1:CLOSE_EPS", "fe_ph1_closed", "FE photon shutter closed"),
     ("AGEBD-PARAMS:CURRENT", "ring_current", "SLS ring current"),
     ("AGEBD-PARAMS:LIFETIME", "lifetime", "Beam lifetime"),
     ("AGEOP-STATUS:LIGHT-DELIVERY", "light_delivery", "Light delivery state"),

csaxs_bec/bec_ipython_client/plugins/OMNY_shared/eps/eps_status_generator.py

@@ -875,9 +875,15 @@ class EpsStatusGenerator:
             "b_closed": hv("X12SA-OP-PSYS:SH-B-CLOSE"),
             "b_ok": hv("X12SA-OP-PSYS:SH-B-OK"),
         })
+        # The old X12SA-FE-PH1:OPEN_EPS/CLOSE_EPS PVs no longer exist; derive
+        # open/closed from the front-end shutter end-switch state (enum
+        # MOVING/OPEN/CLOSED, may arrive as index or string).
+        fe_state = (self._bulk_cache.get("X12SA-FE-PSH1-EMLS:STATE") or {}).get("value")
+        fe_state = {1: "OPEN", 2: "CLOSED"}.get(fe_state, fe_state)
+        fe_known = isinstance(fe_state, str) and fe_state.upper() in ("OPEN", "CLOSED", "MOVING")
         shutters["FE"] = {
-            "a_open": hv("X12SA-FE-PH1:OPEN_EPS"),
-            "a_closed": hv("X12SA-FE-PH1:CLOSE_EPS"),
+            "a_open": (fe_state.upper() == "OPEN") if fe_known else None,
+            "a_closed": (fe_state.upper() == "CLOSED") if fe_known else None,
             "a_ok": None,
             "collective_alarm": None,
         }