feat(19-01): add device type icon and filter to fleet table

- Add DeviceTypeIcon component (Router for RouterOS, Network for SNMP)
- Add Type column to desktop table between Status and Hostname
- Add type icon to mobile DeviceCard view
- Show em-dash for RouterOS version on SNMP devices
- Add device type filter dropdown to DeviceFilters (All / RouterOS / SNMP)
- Pass device_type through URL search params to API query
- Update colSpan from 11 to 12 for empty/loading states

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/fleet/DeviceFilters.tsx

@@ -22,7 +22,7 @@ export function DeviceFilters({ tenantId }: DeviceFiltersProps) {
   // Use relative navigation for filter params
   const navigate = useNavigate()
   // Safely get search params
-  let searchObj: { search?: string; status?: string; page?: number; page_size?: number } = {}
+  let searchObj: { search?: string; status?: string; device_type?: string; page?: number; page_size?: number } = {}
   try {
     // eslint-disable-next-line react-hooks/rules-of-hooks
     searchObj = useSearch({ from: '/_authenticated/tenants/$tenantId/devices/' }) as typeof searchObj
@@ -32,6 +32,7 @@ export function DeviceFilters({ tenantId }: DeviceFiltersProps) {
 
   const searchText = searchObj.search ?? ''
   const statusFilter = searchObj.status ?? ''
+  const deviceTypeFilter = searchObj.device_type ?? ''
 
   const debounceRef = useRef<ReturnType<typeof setTimeout> | null>(null)
   const inputRef = useRef<HTMLInputElement>(null)
@@ -65,11 +66,15 @@ export function DeviceFilters({ tenantId }: DeviceFiltersProps) {
     updateFilter({ status: value === 'all' ? undefined : value })
   }
 
-  const hasFilters = !!(searchText || statusFilter)
+  const handleDeviceType = (value: string) => {
+    updateFilter({ device_type: value === 'all' ? undefined : value })
+  }
+
+  const hasFilters = !!(searchText || statusFilter || deviceTypeFilter)
 
   const clearFilters = () => {
     if (inputRef.current) inputRef.current.value = ''
-    updateFilter({ search: undefined, status: undefined })
+    updateFilter({ search: undefined, status: undefined, device_type: undefined })
   }
 
   return (
@@ -100,6 +105,18 @@ export function DeviceFilters({ tenantId }: DeviceFiltersProps) {
         </SelectContent>
       </Select>
 
+      {/* Device type filter */}
+      <Select value={deviceTypeFilter || 'all'} onValueChange={handleDeviceType}>
+        <SelectTrigger className="w-32">
+          <SelectValue placeholder="All types" />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value="all">All types</SelectItem>
+          <SelectItem value="routeros">RouterOS</SelectItem>
+          <SelectItem value="snmp">SNMP</SelectItem>
+        </SelectContent>
+      </Select>
+
       {hasFilters && (
         <Button variant="ghost" size="sm" onClick={clearFilters} className="text-text-muted">
           <X className="h-3.5 w-3.5 mr-1" />

frontend/src/components/fleet/FleetTable.tsx

@@ -2,7 +2,7 @@ import { useRef, useState, useCallback } from 'react'
 import { Link, useNavigate } from '@tanstack/react-router'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { useVirtualizer } from '@tanstack/react-virtual'
-import { ChevronUp, ChevronDown, ChevronsUpDown, Monitor, MapPin } from 'lucide-react'
+import { ChevronUp, ChevronDown, ChevronsUpDown, Monitor, MapPin, Router, Network } from 'lucide-react'
 import { devicesApi, sitesApi, type DeviceResponse } from '@/lib/api'
 import { Badge } from '@/components/ui/badge'
 import { useShortcut } from '@/hooks/useShortcut'
@@ -30,6 +30,7 @@ interface FleetTableProps {
   tenantId: string
   search?: string
   status?: string
+  deviceType?: string
   sortBy?: string
   sortDir?: 'asc' | 'desc'
   page?: number
@@ -52,6 +53,13 @@ function StatusDot({ status }: { status: string }) {
   )
 }
 
+function DeviceTypeIcon({ deviceType }: { deviceType: string }) {
+  if (deviceType === 'snmp') {
+    return <Network className="h-3.5 w-3.5 text-text-muted" title="SNMP" />
+  }
+  return <Router className="h-3.5 w-3.5 text-text-muted" title="RouterOS" />
+}
+
 interface SortHeaderProps {
   column: string
   label: string
@@ -98,6 +106,7 @@ function DeviceCard({ device, tenantId }: { device: DeviceResponse; tenantId: st
       <div className="flex items-start justify-between gap-2">
         <div className="flex items-center gap-2 min-w-0">
           <StatusDot status={device.status} />
+          <DeviceTypeIcon deviceType={device.device_type ?? 'routeros'} />
           <DeviceLink tenantId={tenantId} deviceId={device.id} className="font-medium text-sm text-text-primary truncate">{device.hostname}</DeviceLink>
         </div>
         <span className="text-xs text-text-muted shrink-0">{formatUptime(device.uptime_seconds)}</span>
@@ -105,7 +114,7 @@ function DeviceCard({ device, tenantId }: { device: DeviceResponse; tenantId: st
       <div className="mt-1.5 flex items-center gap-3 text-xs text-text-secondary">
         <span className="font-mono">{device.ip_address}</span>
         {device.model && <span>{device.model}</span>}
-        {device.routeros_version && <span>v{device.routeros_version}</span>}
+        {device.device_type !== 'snmp' && device.routeros_version && <span>v{device.routeros_version}</span>}
       </div>
       {device.tags.length > 0 && (
         <div className="mt-1.5 flex flex-wrap gap-1">
@@ -126,6 +135,7 @@ export function FleetTable({
   tenantId,
   search,
   status,
+  deviceType,
   sortBy = 'hostname',
   sortDir = 'asc',
   page = 1,
@@ -156,11 +166,12 @@ export function FleetTable({
   })
 
   const { data, isLoading, isFetching } = useQuery({
-    queryKey: ['devices', tenantId, { search, status, sortBy, sortDir, page, pageSize }],
+    queryKey: ['devices', tenantId, { search, status, deviceType, sortBy, sortDir, page, pageSize }],
     queryFn: () =>
       devicesApi.list(tenantId, {
         search,
         status,
+        device_type: deviceType,
         sort_by: sortBy,
         sort_dir: sortDir,
         page,
@@ -269,6 +280,9 @@ export function FleetTable({
         <td className="px-2 py-1.5 text-center">
           <StatusDot status={device.status} />
         </td>
+        <td className="px-2 py-1.5 text-center w-8">
+          <DeviceTypeIcon deviceType={device.device_type ?? 'routeros'} />
+        </td>
         <td className="px-2 py-1.5 font-medium text-text-primary"><DeviceLink tenantId={tenantId} deviceId={device.id}>{device.hostname}</DeviceLink></td>
         <td className="px-2 py-1.5 font-mono text-xs text-text-secondary">
           {device.ip_address}
@@ -288,7 +302,7 @@ export function FleetTable({
           )}
         </td>
         <td className="px-2 py-1.5 text-text-secondary">
-          {device.routeros_version ?? '—'}
+          {device.device_type === 'snmp' ? '—' : (device.routeros_version ?? '—')}
         </td>
         <td className="px-2 py-1.5 text-text-secondary">
           {device.firmware_version || '—'}
@@ -324,6 +338,7 @@ export function FleetTable({
           />
         </th>
         <th scope="col" className="px-2 py-2 text-[10px] uppercase tracking-wider font-semibold text-text-muted w-6"><span className="sr-only">Status</span></th>
+        <th scope="col" className="px-2 py-2 text-[10px] uppercase tracking-wider font-semibold text-text-muted w-8"><span className="sr-only">Type</span></th>
         <SortHeader column="hostname" label="Hostname" {...sortProps} className="text-left" />
         <SortHeader column="ip_address" label="IP" {...sortProps} className="text-left" />
         <SortHeader column="model" label="Model" {...sortProps} className="text-left" />
@@ -432,13 +447,13 @@ export function FleetTable({
               <tbody>
                 {isLoading ? (
                   <tr>
-                    <td colSpan={11} className="px-3 py-4">
+                    <td colSpan={12} className="px-3 py-4">
                       <TableSkeleton />
                     </td>
                   </tr>
                 ) : items.length === 0 ? (
                   <tr>
-                    <td colSpan={11}>
+                    <td colSpan={12}>
                       <EmptyState
                         icon={Monitor}
                         title="No devices yet"

frontend/src/routes/_authenticated/tenants/$tenantId/devices/index.tsx

@@ -13,6 +13,7 @@ import { AddDeviceForm } from '@/components/fleet/AddDeviceForm'
 const searchSchema = z.object({
   search: z.string().optional(),
   status: z.string().optional(),
+  device_type: z.string().optional(),
   sort_by: z.string().optional(),
   sort_dir: z.enum(['asc', 'desc']).optional(),
   page: z.number().int().positive().optional(),
@@ -94,6 +95,7 @@ function DevicesPage() {
         tenantId={tenantId}
         search={search.search}
         status={search.status}
+        deviceType={search.device_type}
         sortBy={search.sort_by}
         sortDir={search.sort_dir}
         page={search.page}