Initial commit: JARVIS AI dashboard v2.3

- 4-tier chat: HA control → Ollama → Groq → Claude
- Push-based agent system with heartbeat/metrics
- Network monitoring, alerts, Proxmox, Home Assistant
- Windows + Linux agent installers
- Stats cache cron, facts collector, KB engine

api/endpoints/system.php

@@ -0,0 +1,136 @@
+<?php
+// System stats endpoint — reads /proc directly, no shell injection risk
+
+function getCpuUsage(): float {
+    $s1 = file('/proc/stat')[0];
+    preg_match('/cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/', $s1, $m1);
+    usleep(200000);
+    $s2 = file('/proc/stat')[0];
+    preg_match('/cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/', $s2, $m2);
+    $idle1  = $m1[4] + $m1[5];
+    $total1 = array_sum(array_slice($m1, 1));
+    $idle2  = $m2[4] + $m2[5];
+    $total2 = array_sum(array_slice($m2, 1));
+    $dTotal = $total2 - $total1;
+    $dIdle  = $idle2  - $idle1;
+    return $dTotal > 0 ? round((($dTotal - $dIdle) / $dTotal) * 100, 1) : 0.0;
+}
+
+function getMemory(): array {
+    $lines = file('/proc/meminfo');
+    $mem = [];
+    foreach ($lines as $l) {
+        if (preg_match('/^(\w+):\s+(\d+)/', $l, $m)) $mem[$m[1]] = (int)$m[2];
+    }
+    $total     = $mem['MemTotal']     ?? 0;
+    $available = $mem['MemAvailable'] ?? 0;
+    $used      = $total - $available;
+    return [
+        'total_mb' => round($total / 1024),
+        'used_mb'  => round($used  / 1024),
+        'free_mb'  => round($available / 1024),
+        'percent'  => $total > 0 ? round(($used / $total) * 100, 1) : 0,
+    ];
+}
+
+function getDisk(): array {
+    $disks = [];
+    foreach (disk_total_space('/') as $dummy) break; // warm up
+    $total = disk_total_space('/');
+    $free  = disk_free_space('/');
+    $used  = $total - $free;
+    return [
+        'total_gb' => round($total / 1073741824, 1),
+        'used_gb'  => round($used  / 1073741824, 1),
+        'free_gb'  => round($free  / 1073741824, 1),
+        'percent'  => $total > 0 ? round(($used / $total) * 100, 1) : 0,
+    ];
+}
+
+function getDisk2(): array {
+    $total = disk_total_space('/');
+    $free  = disk_free_space('/');
+    $used  = $total - $free;
+    return [
+        'total_gb' => round($total / 1073741824, 1),
+        'used_gb'  => round($used  / 1073741824, 1),
+        'free_gb'  => round($free  / 1073741824, 1),
+        'percent'  => $total > 0 ? round(($used / $total) * 100, 1) : 0,
+    ];
+}
+
+function getUptime(): string {
+    $secs = (int)file_get_contents('/proc/uptime');
+    $d = intdiv($secs, 86400); $h = intdiv($secs % 86400, 3600);
+    $m = intdiv($secs % 3600,  60);
+    return "{$d}d {$h}h {$m}m";
+}
+
+function getLoadAvg(): array {
+    $l = explode(' ', file_get_contents('/proc/loadavg'));
+    return ['1m' => (float)$l[0], '5m' => (float)$l[1], '15m' => (float)$l[2]];
+}
+
+function getNetworkIO(): array {
+    $lines = file('/proc/net/dev');
+    $ifaces = [];
+    foreach ($lines as $line) {
+        if (strpos($line, ':') === false) continue;
+        [$name, $stats] = explode(':', $line, 2);
+        $name = trim($name);
+        if ($name === 'lo') continue;
+        $vals = preg_split('/\s+/', trim($stats));
+        $ifaces[$name] = [
+            'rx_mb' => round($vals[0] / 1048576, 2),
+            'tx_mb' => round($vals[8] / 1048576, 2),
+        ];
+    }
+    return $ifaces;
+}
+
+function getServices(): array {
+    $services = ['apache2', 'mysql'];
+    $result = [];
+    foreach ($services as $svc) {
+        $out = shell_exec('systemctl is-active ' . escapeshellarg($svc) . ' 2>/dev/null');
+        $result[$svc] = trim($out ?? '') === 'active';
+    }
+    return $result;
+}
+
+function getTopProcesses(): array {
+    $out = shell_exec("ps aux --sort=-%cpu | awk 'NR>1 && NR<=6 {print $11\",\"$3\",\"$4}' 2>/dev/null");
+    $procs = [];
+    foreach (explode("\n", trim($out ?? '')) as $line) {
+        if (!$line) continue;
+        [$cmd, $cpu, $mem] = explode(',', $line, 3);
+        $procs[] = ['cmd' => basename($cmd), 'cpu' => (float)$cpu, 'mem' => (float)$mem];
+    }
+    return $procs;
+}
+
+$cpu    = getCpuUsage();
+$memory = getMemory();
+$disk   = getDisk2();
+
+$stats = [
+    'cpu'        => $cpu,
+    'memory'     => $memory,
+    'disk'       => $disk,
+    'uptime'     => getUptime(),
+    'load'       => getLoadAvg(),
+    'network_io' => getNetworkIO(),
+    'services'   => getServices(),
+    'processes'  => getTopProcesses(),
+    'hostname'   => gethostname(),
+    'ip'         => JARVIS_IP,
+    'timestamp'  => date('c'),
+];
+
+// Log to history
+JarvisDB::execute(
+    'INSERT INTO metrics_history (metric_name, metric_value, host) VALUES (?,?,?),(?,?,?),(?,?,?)',
+    ['cpu', $cpu, 'jarvis', 'memory', $memory['percent'], 'jarvis', 'disk', $disk['percent'], 'jarvis']
+);
+
+echo json_encode($stats);