fix: agent timeouts hid hf-pdocker-01; refresh links and groups

- agent: stats one_shot=True + 20 workers (.192 went 12s -> ~2s);
  /health ignores Dead containers
- server: /containers fetch timeout 10s -> 30s (was silently returning
  [] for the busiest node)
- links page: drop FRIDAY Voice, add Onyx, Guacamole, Synapse Admin,
  n8n, CouchDB; MCPO -> /docs, Trivy -> /healthz, Jellyseerr -> Seerr
- config.json: drop dead gpu-workstation (192.168.86.27)
- groups.json: rebuilt for current container names (14 groups)
- includes earlier uncommitted work (models, styles, ports sorting)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NQhgEUqcaV4WM2S4hfXgHD

config.json

@@ -1,7 +1,19 @@
 {
   "nodes": [
-    {"name": "hf-pdocker-01", "host": "192.168.86.192", "agent_port": 8889},
-    {"name": "hf-pdocker-02", "host": "192.168.86.100", "agent_port": 8889},
-    {"name": "bart", "host": "192.168.86.167", "agent_port": 8889}
+    {
+      "name": "hf-pdocker-01",
+      "host": "192.168.86.192",
+      "agent_port": 8889
+    },
+    {
+      "name": "hf-pdocker-02",
+      "host": "192.168.86.100",
+      "agent_port": 8889
+    },
+    {
+      "name": "bart",
+      "host": "192.168.86.167",
+      "agent_port": 8889
+    }
   ]
-}
+}