fix(monitoring): hostname, tooltip timestamps, default range (v0.5.1)

- Bug 1: Read hostname from /host/etc/hostname instead of os.Hostname()
  which returns the container ID inside Docker. Added volume mount.
- Bug 2: Tooltip callback used parsed.x (category index) instead of
  label (actual timestamp), showing 1970 dates.
- Bug 3+4: Default range changed from 24h to 1h so charts show data
  immediately on new deployments with limited history.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

controller/docker-compose.yml

@@ -27,6 +27,8 @@ services:
       - /sys:/host/sys:ro
       # Host OS info — for monitoring page system info
       - /etc/os-release:/host/etc/os-release:ro
+      # Host hostname — for monitoring page (os.Hostname() returns container ID)
+      - /etc/hostname:/host/etc/hostname:ro
     environment:
       - TZ=Europe/Budapest
     labels:

controller/internal/metrics/sysinfo.go

@@ -16,8 +16,12 @@ import (
 func GetStaticInfo() StaticSystemInfo {
 	info := StaticSystemInfo{}
 
-	// Hostname
+	// Hostname — try host mount first, fall back to os.Hostname()
-	info.Hostname, _ = os.Hostname()
+	if data, err := os.ReadFile("/host/etc/hostname"); err == nil {
+		info.Hostname = strings.TrimSpace(string(data))
+	} else {
+		info.Hostname, _ = os.Hostname()
+	}
 
 	// OS — try host mount first, fall back to container's
 	info.OS = readOSRelease("/host/etc/os-release")

controller/internal/web/templates/monitoring.html

@@ -41,9 +41,9 @@
     <div class="monitor-card-header">
         <h3>Rendszer metrikák</h3>
         <div class="time-range-bar" id="system-range-bar">
-            <button class="filter-btn" data-range="1h">1 óra</button>
+            <button class="filter-btn active" data-range="1h">1 óra</button>
             <button class="filter-btn" data-range="6h">6 óra</button>
-            <button class="filter-btn active" data-range="24h">24 óra</button>
+            <button class="filter-btn" data-range="24h">24 óra</button>
             <button class="filter-btn" data-range="7d">7 nap</button>
             <button class="filter-btn" data-range="30d">30 nap</button>
         </div>
@@ -94,9 +94,9 @@
     <div class="monitor-card-header">
         <h3 id="container-detail-title">–</h3>
         <div class="time-range-bar" id="container-range-bar">
-            <button class="filter-btn" data-range="1h">1 óra</button>
+            <button class="filter-btn active" data-range="1h">1 óra</button>
             <button class="filter-btn" data-range="6h">6 óra</button>
-            <button class="filter-btn active" data-range="24h">24 óra</button>
+            <button class="filter-btn" data-range="24h">24 óra</button>
             <button class="filter-btn" data-range="7d">7 nap</button>
         </div>
         <button class="btn btn-outline btn-sm" onclick="closeContainerDetail()">Bezárás</button>
@@ -168,7 +168,7 @@
                 callbacks: {
                     title: function(items) {
                         if (!items.length) return '';
-                        return formatTimestamp(items[0].parsed.x || items[0].label);
+                        return formatTimestamp(items[0].label);
                     }
                 }
             }
@@ -212,7 +212,7 @@
     }
 
     // --- System charts ---
-    let systemRange = '24h';
+    let systemRange = '1h';
     let chartCPU, chartMem, chartTemp, chartLoad;
 
     function initSystemCharts() {
@@ -363,7 +363,7 @@
     // --- Container detail ---
     let detailChartCPU, detailChartMem;
     let detailContainer = '';
-    let detailRange = '24h';
+    let detailRange = '1h';
 
     function initDetailCharts() {
         const mkChart = (id, color, yLabel) => {