feat(devices): add console-only display name (console_name)

Lets staff set a friendly name for a device independent of whatever
name the end user gave it in the app. console_name is never shown to
app users and never synced from/to device_name; every display label
across search, equipment/helpdesk name resolution, device search, and
the Manage tab's issue linker now falls back through console_name ->
device_name -> serial rather than device_name alone.

Also includes an incidental one-line fix in devices/service.py: the
nested-struct deep-merge in update_device() was missing the newly
added device_health_settings key.

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

backend/devices/service.py

@@ -159,9 +159,10 @@ def list_devices(
         if search:
             search_lower = search.lower()
             name_match = search_lower in (device.device_name or "").lower()
+            console_name_match = search_lower in (device.console_name or "").lower()
             location_match = search_lower in (device.device_location or "").lower()
             sn_match = search_lower in (device.serial_number or "").lower()
-            if not (name_match or location_match or sn_match):
+            if not (name_match or console_name_match or location_match or sn_match):
                 continue
 
         results.append(device)
@@ -222,7 +223,7 @@ def update_device(device_doc_id: str, data: DeviceUpdate) -> DeviceInDB:
     # Deep-merge nested structs so unmentioned sub-fields are preserved
     existing = doc.to_dict()
     nested_keys = (
-        "device_attributes", "device_subscription", "device_stats",
+        "device_attributes", "device_subscription", "device_stats", "device_health_settings",
     )
     for key in nested_keys:
         if key in update_data and isinstance(existing.get(key), dict):

backend/equipment/service.py

@@ -48,7 +48,8 @@ def _resolve_names(db, device_id: str | None, user_id: str | None) -> tuple[str,
         if device_id and isinstance(device_id, str) and device_id.strip():
             device_doc = db.collection("devices").document(device_id.strip()).get()
             if device_doc.exists:
-                device_name = device_doc.to_dict().get("device_name", "")
+                device_data = device_doc.to_dict()
+                device_name = device_data.get("console_name") or device_data.get("device_name", "")
 
         if user_id and isinstance(user_id, str) and user_id.strip():
             user_doc = db.collection("users").document(user_id.strip()).get()

backend/helpdesk/service.py

@@ -50,7 +50,8 @@ def _resolve_device_name(db, device_id: str) -> str:
     try:
         doc = db.collection("devices").document(device_id.strip()).get()
         if doc.exists:
-            return doc.to_dict().get("device_name", "")
+            data = doc.to_dict()
+            return data.get("console_name") or data.get("device_name", "")
     except Exception as e:
         print(f"[helpdesk] Error resolving device name: {e}")
     return ""

backend/search/router.py

@@ -26,8 +26,9 @@ def _search_devices(q: str) -> list[dict]:
         return []
     out = []
     for d in results[:LIMIT]:
-        label = d.device_name or d.serial_number or d.device_id or d.id
-        sublabel = d.serial_number if d.device_name else None
+        display_name = d.console_name or d.device_name
+        label = display_name or d.serial_number or d.device_id or d.id
+        sublabel = d.serial_number if display_name else None
         out.append({
             "type": "device",
             "id": d.id,