fix: leftover old severity references (info→routine, filter dropdown)

dashboard-frontend/src/pages/Alerts.tsx

@@ -194,7 +194,7 @@ function AlertHistoryTable({
     'packet_flood',
   ]
 
-  const severities = ['all', 'critical', 'warning', 'watch', 'info']
+  const severities = ["all", "immediate", "priority", "routine"]
 
   return (
     <div className="bg-bg-card border border-border rounded-lg">

dashboard-frontend/src/pages/Notifications.tsx

@@ -274,7 +274,7 @@ const RULE_TEMPLATES = [
       enabled: true,
       trigger_type: "schedule" as const,
       categories: [] as string[],
-      min_severity: "info",
+      min_severity: "routine",
       schedule_frequency: "daily" as const,
       schedule_time: "07:00",
       schedule_time_2: "",

meshai/env/usgs.py

@@ -376,7 +376,7 @@ class USGSStreamsAdapter:
                         flood_status = "Action Stage"
 
                 # Fall back to legacy manual thresholds
-                if severity == "info":
+                if severity == "routine":
                     threshold = self._flood_thresholds.get(site_id, {}).get(param_type)
                     if threshold and value > threshold:
                         severity = "priority"