updated view and database

app/models/__init__.py

@@ -4,7 +4,7 @@ Database models for enhanced server monitoring system
 from sqlalchemy import Column, Integer, String, DateTime, Text, Boolean, ForeignKey, LargeBinary, Float, Table
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship
-from datetime import datetime
+from datetime import datetime, timedelta
 import json
 import hashlib
 from cryptography.fernet import Fernet
@@ -53,6 +53,9 @@ class Device(Base):
     info_reviewed_at = Column(DateTime, default=lambda: datetime(1970, 1, 1))
     card_presence = Column(String(10), default='enable')
     custom_chrome_url = Column(String(500), nullable=True)  # per-device production URL override (overrides WMTGlobalConfig.chrome_url)
+    # Stamped on every WMT client check-in (config pull / update request / timestamp poll).
+    # Authoritative signal that a device is "WMT enabled" on the unified devices page.
+    wmt_last_seen = Column(DateTime, nullable=True, index=True)
 
     # Relationships
     logs = relationship("LogEntry", back_populates="device")
@@ -67,6 +70,29 @@ class Device(Base):
         """Alias for nume_masa – used by WMT module."""
         return self.nume_masa
 
+    @property
+    def wmt_enabled(self):
+        """True when this device has ever checked in via the WMT client API.
+
+        This is the authoritative "WMT enabled" signal for the unified devices
+        page (replaces the old 'has a MAC address' heuristic).
+        """
+        return self.wmt_last_seen is not None
+
+    @property
+    def is_online(self):
+        """Heuristic online state: active status and seen within the last 10 minutes."""
+        if self.status != 'active' or not self.last_seen:
+            return False
+        return (datetime.utcnow() - self.last_seen) <= timedelta(minutes=10)
+
+    @property
+    def minutes_since_last_seen(self):
+        """Whole minutes since the device was last seen (None if never seen)."""
+        if not self.last_seen:
+            return None
+        return int((datetime.utcnow() - self.last_seen).total_seconds() // 60)
+
     def __repr__(self):
         return f"<Device(hostname='{self.hostname}', ip='{self.device_ip}')>"