refactor: extract _annotate_suppressions helper, remove orphaned CSS

- Extract identical suppression-annotation loop from index() and
  api_status() into _annotate_suppressions() helper to eliminate DRY
  violation
- Improve stuck-job error message: 'thread crash' → 'no activity for
  5 minutes' (less alarming, more accurate)
- Remove orphaned .events-filter-bar CSS class (never referenced in
  any template or JS file)

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

app.py

@@ -73,8 +73,8 @@ def _purge_old_jobs_loop():
             for jid, j in list(_diag_jobs.items()):
                 if j['status'] == 'running' and j.get('created_at', 0) < stuck_cutoff:
                     j['status'] = 'done'
-                    j['result'] = {'status': 'error', 'error': 'Diagnostic timed out (thread crash)'}
+                    j['result'] = {'status': 'error', 'error': 'Diagnostic abandoned — no activity for 5 minutes.'}
-                    logger.error(f'Diagnostic job {jid} appeared stuck; marked as errored')
+                    logger.error(f'Diagnostic job {jid} stuck (no activity for 5 min); marked done/error')
 
 
 _purge_thread = threading.Thread(target=_purge_old_jobs_loop, daemon=True)
@@ -143,12 +143,31 @@ def require_auth(f):
 
 
 # ---------------------------------------------------------------------------
-# Page routes
+# Helpers
 # ---------------------------------------------------------------------------
 
 _PAGE_LIMIT = 200  # max events returned per request
 
 
+def _annotate_suppressions(events: list, suppressions: list) -> None:
+    """Annotate each event dict in-place with an is_suppressed bool."""
+    for ev in events:
+        sup_type = (
+            'unifi_device' if ev.get('event_type') == 'unifi_device_offline'
+            else 'interface' if ev.get('event_type') == 'interface_down'
+            else 'host'
+        )
+        ev['is_suppressed'] = db.check_suppressed(
+            suppressions, sup_type,
+            ev.get('target_name', ''), ev.get('target_detail', '') or '',
+        )
+
+
+# ---------------------------------------------------------------------------
+# Page routes
+# ---------------------------------------------------------------------------
+
+
 @app.route('/')
 @require_auth
 def index():
@@ -160,16 +179,7 @@ def index():
     last_check = db.get_state('last_check', 'Never')
     snapshot = json.loads(snapshot_raw) if snapshot_raw else {}
     suppressions = db.get_active_suppressions()
-    for ev in events:
+    _annotate_suppressions(events, suppressions)
-        sup_type = (
-            'unifi_device' if ev.get('event_type') == 'unifi_device_offline'
-            else 'interface' if ev.get('event_type') == 'interface_down'
-            else 'host'
-        )
-        ev['is_suppressed'] = db.check_suppressed(
-            suppressions, sup_type,
-            ev.get('target_name', ''), ev.get('target_detail', '') or '',
-        )
     recent_resolved = db.get_recent_resolved(hours=24, limit=10)
     return render_template(
         'index.html',
@@ -225,16 +235,7 @@ def suppressions_page():
 def api_status():
     active = db.get_active_events(limit=_PAGE_LIMIT)
     suppressions = db.get_active_suppressions()
-    for ev in active:
+    _annotate_suppressions(active, suppressions)
-        sup_type = (
-            'unifi_device' if ev.get('event_type') == 'unifi_device_offline'
-            else 'interface' if ev.get('event_type') == 'interface_down'
-            else 'host'
-        )
-        ev['is_suppressed'] = db.check_suppressed(
-            suppressions, sup_type,
-            ev.get('target_name', ''), ev.get('target_detail', '') or '',
-        )
     last_check = db.get_state('last_check', 'Never')
     return jsonify({
         'summary': db.get_status_summary(),

static/style.css

@@ -214,8 +214,6 @@
   padding: 1px 7px;
 }
 .g-section-actions  { margin-left: auto; }
-.events-filter-bar  { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
-.events-filter-bar .lt-input-sm { width: 220px; }
 .sev-pills          { display: flex; gap: 4px; }
 .g-page-sub { font-size: .78em; color: var(--text-muted); margin-top: 4px; }
 .g-page-sub-aside { font-size: .78em; color: var(--text-muted); margin-left: 8px; }