De-hardcode ticket URL and cluster name; improve diagnostic polling UX

app.py:
- Context processor injects config.ticket_api.web_url into all templates
  (falls back to 'http://t.lotusguild.org/ticket/' if not set in config)

templates/base.html:
- Inject GANDALF_CONFIG JS global with ticket_web_url before app.js loads

static/app.js:
- Use GANDALF_CONFIG.ticket_web_url instead of hardcoded domain

templates/index.html:
- Use {{ config.ticket_api.web_url }} Jinja var instead of hardcoded domain

monitor.py:
- CLUSTER_NAME constant kept as default; NetworkMonitor now reads cluster_name
  from config monitor.cluster_name, falling back to the constant
- All CLUSTER_NAME references inside class methods replaced with self.cluster_name

templates/inspector.html:
- pollDiagnostic() .catch() now clears interval and shows error message instead
  of silently ignoring network failures during active polling

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

app.py

@@ -29,6 +29,19 @@ app = Flask(__name__)
 
 _cfg = None
 
+
+@app.context_processor
+def inject_config():
+    """Inject safe config values into all templates."""
+    cfg = _config()
+    return {
+        'config': {
+            'ticket_api': {
+                'web_url': cfg.get('ticket_api', {}).get('web_url', 'http://t.lotusguild.org/ticket/'),
+            }
+        }
+    }
+
 # In-memory diagnostic job store { job_id: { status, result, created_at } }
 _diag_jobs: dict = {}
 _diag_lock = threading.Lock()

monitor.py

@@ -641,6 +641,7 @@ class NetworkMonitor:
         self.poll_interval = mon.get('poll_interval', 120)
         self.fail_thresh = mon.get('failure_threshold', 2)
         self.cluster_thresh = mon.get('cluster_threshold', 3)
+        self.cluster_name = mon.get('cluster_name', CLUSTER_NAME)
 
         # Build Prometheus instance → hostname lookup
         self._instance_map: Dict[str, str] = {
@@ -706,13 +707,13 @@ class NetworkMonitor:
             sup = db.check_suppressed(suppressions, 'all', '')
             event_id, is_new, consec = db.upsert_event(
                 'cluster_network_issue', 'critical', 'prometheus',
-                CLUSTER_NAME, '',
+                self.cluster_name, '',
                 f'{len(hosts_with_regression)} hosts reporting simultaneous interface failures: '
                 f'{", ".join(hosts_with_regression)}',
             )
             if not sup and is_new:
                 title = (
-                    f'[{CLUSTER_NAME}][auto][production][issue][network][cluster-wide] '
+                    f'[{self.cluster_name}][auto][production][issue][network][cluster-wide] '
                     f'Multiple hosts reporting interface failures'
                 )
                 desc = (
@@ -728,7 +729,7 @@ class NetworkMonitor:
                 if tid:
                     db.set_ticket_id(event_id, tid)
         else:
-            db.resolve_event('cluster_network_issue', CLUSTER_NAME, '')
+            db.resolve_event('cluster_network_issue', self.cluster_name, '')
 
     def _ticket_interface(
         self, event_id: int, is_new: bool, host: str, iface: str, consec: int

static/app.js

@@ -135,8 +135,10 @@ function updateEventsTable(events) {
     const supType = e.event_type === 'unifi_device_offline' ? 'unifi_device'
                   : e.event_type === 'interface_down'       ? 'interface'
                   : 'host';
+    const ticketBase = (typeof GANDALF_CONFIG !== 'undefined' && GANDALF_CONFIG.ticket_web_url)
+      ? GANDALF_CONFIG.ticket_web_url : 'http://t.lotusguild.org/ticket/';
     const ticket = e.ticket_id
-      ? `<a href="http://t.lotusguild.org/ticket/${e.ticket_id}" target="_blank"
+      ? `<a href="${ticketBase}${e.ticket_id}" target="_blank"
             class="ticket-link">#${e.ticket_id}</a>`
       : '–';
     return `

templates/base.html

@@ -41,6 +41,11 @@
     {% block content %}{% endblock %}
   </main>
 
+  <script>
+    const GANDALF_CONFIG = {
+      ticket_web_url: "{{ config.get('ticket_api', {}).get('web_url', 'http://t.lotusguild.org/ticket/') }}"
+    };
+  </script>
   <script src="{{ url_for('static', filename='app.js') }}"></script>
   {% block scripts %}{% endblock %}
 </body>

templates/index.html

@@ -219,7 +219,7 @@
             <td>{{ e.consecutive_failures }}</td>
             <td>
               {% if e.ticket_id %}
-              <a href="http://t.lotusguild.org/ticket/{{ e.ticket_id }}" target="_blank"
+              <a href="{{ config.ticket_api.web_url }}{{ e.ticket_id }}" target="_blank"
                  class="ticket-link">#{{ e.ticket_id }}</a>
               {% else %}–{% endif %}
             </td>

templates/inspector.html

@@ -451,7 +451,11 @@ function pollDiagnostic(jobId, statusEl, resultsEl) {
         renderDiagnosticResults(resp.result, resultsEl);
       }
     })
-    .catch(() => {});
+    .catch(() => {
+      clearInterval(_diagPollTimer);
+      _diagPollTimer = null;
+      statusEl.textContent = 'Error: lost connection while collecting diagnostics.';
+    });
   }, 2000);
 }