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/weather.php

@@ -0,0 +1,20 @@
+<?php
+// Weather endpoint — serves from api_cache (refreshed every 30 min by cron)
+
+$cached = JarvisDB::query(
+    'SELECT data, UNIX_TIMESTAMP(updated_at) as ts FROM api_cache WHERE cache_key=? LIMIT 1',
+    ['weather']
+);
+
+if ($cached && !empty($cached[0]['data'])) {
+    $out = json_decode($cached[0]['data'], true);
+    $out['cache_age_s'] = (int)(time() - (int)$cached[0]['ts']);
+    echo json_encode($out);
+} else {
+    echo json_encode([
+        'current'    => null,
+        'forecast'   => [],
+        'cache_age_s' => -1,
+        'message'    => 'Weather data warming up — available within 5 minutes.',
+    ]);
+}