Initial commit: Homelab Dashboard with YAML configuration

Features:
- Service health monitoring with response times
- Proxmox cluster integration (nodes, VMs, containers)
- PBS backup server monitoring
- Camera viewer with WebRTC (go2rtc)
- Docker container monitoring
- Uptime Kuma integration
- Mobile-friendly responsive design
- YAML-based configuration for easy setup

app/templates/partials/cameras.html

@@ -0,0 +1,20 @@
+<div class="grid grid-cols-2 gap-2">
+    {% for camera in cameras[:4] %}
+    <div class="camera-thumb relative group">
+        <img src="/api/camera-snapshot/{{ camera }}"
+             alt="{{ camera }}"
+             class="w-full h-full"
+             loading="lazy"
+             onerror="this.src='data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 56%22><rect fill=%22%231f2937%22 width=%22100%22 height=%2256%22/><text x=%2250%22 y=%2228%22 text-anchor=%22middle%22 fill=%22%236b7280%22 font-size=%228%22>No Signal</text></svg>'">
+        <div class="absolute inset-0 bg-black/60 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center">
+            <a href="{{ go2rtc_url }}/stream.html?src={{ camera }}" target="_blank" class="text-white text-xs hover:text-cyan-400">
+                {{ camera }}
+            </a>
+        </div>
+        <div class="absolute bottom-1 left-1 text-[10px] text-white bg-black/50 px-1 rounded">{{ camera }}</div>
+    </div>
+    {% endfor %}
+</div>
+<a href="/cameras" class="block text-center text-xs text-gray-500 hover:text-cyan-400 mt-2">
+    View all {{ cameras | length }} cameras
+</a>