Add active user session tracking from agent user :0 2026-07-16 15:46

user     pts/0        2026-07-16 15:50 (:0)
user     pts/1        2026-07-16 16:46 (:0)
user     pts/2        2026-07-17 09:05 (:0) to server UI

server/schemas.py

@@ -46,6 +46,13 @@ class LoginPayload(BaseModel):
     password: str
 
 
+class SessionInfo(BaseModel):
+    username: Optional[str] = None
+    tty: Optional[str] = None
+    login_time: Optional[str] = None
+    origin: Optional[str] = None
+
+
 class HeartbeatPayload(BaseModel):
     hostname: str
     username: str
@@ -60,6 +67,7 @@ class HeartbeatPayload(BaseModel):
     cpu_temp: Optional[float] = None
     load_avg: Optional[str] = None
     processes: Optional[List[dict]] = None
+    sessions: Optional[List[SessionInfo]] = None
 
 
 class HeartbeatOut(BaseModel):
@@ -70,6 +78,7 @@ class HeartbeatOut(BaseModel):
     cpu_percent: Optional[float]
     ram_percent: Optional[float]
     cpu_temp: Optional[float]
+    sessions: Optional[List[SessionInfo]] = None
 
     model_config = ConfigDict(from_attributes=True)