feat(webui,dashboard): add RAM Usage card between Disk Usage and Uptime, live-verified on Pager

payload/user/remote_access/pager-webui/server.py

@@ -3025,6 +3025,23 @@ def disk_data():
     return {}
 
 
+def mem_data(path='/proc/meminfo'):
+    try:
+        vals = {}
+        with open(path) as f:
+            for line in f:
+                k, v = line.split(':')
+                vals[k] = int(v.strip().split()[0])
+        total = vals.get('MemTotal', 0)
+        avail = vals.get('MemAvailable', vals.get('MemFree', 0))
+        if not total:
+            return {}
+        used = max(total - avail, 0)
+        return {'size': total * 1024, 'used': used * 1024, 'avail': avail * 1024}
+    except (OSError, ValueError):
+        return {}
+
+
 def uptime_data():
     rc, out, err = device_run(['cat', '/proc/uptime'])
     try:
@@ -3066,6 +3083,7 @@ def status_data():
         'wifi': [wifi_iface_info(n) for n in ifaces],
         'clients': assoc_clients(ifaces),
         'disk': disk_data(),
+        'mem': mem_data(),
         'uptime': uptime_data(),
         'hostname': hostname_data(),
     }