feat: add filtered traffic page to admin dashboard

Add admin page at /admin/filtered-traffic showing domains blocked by the
referrer spam filter with reason badges and date range selector. Helps
operators monitor spam filtering and catch false positives.

app/admin/filtered-traffic/page.tsx

@@ -0,0 +1,91 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { LoadingOverlay } from '@ciphera-net/ui'
+import { getFilteredReferrers, FilteredReferrer } from '@/lib/api/admin'
+
+export default function FilteredTrafficPage() {
+  const [referrers, setReferrers] = useState<FilteredReferrer[]>([])
+  const [loading, setLoading] = useState(true)
+  const [days, setDays] = useState(30)
+
+  useEffect(() => {
+    setLoading(true)
+    const endDate = new Date().toISOString().split('T')[0]
+    const startDate = new Date(Date.now() - days * 86400000).toISOString().split('T')[0]
+    getFilteredReferrers(startDate, endDate)
+      .then(setReferrers)
+      .finally(() => setLoading(false))
+  }, [days])
+
+  if (loading) {
+    return <LoadingOverlay logoSrc="/pulse_icon_no_margins.png" title="Loading filtered traffic..." />
+  }
+
+  const totalBlocked = referrers.reduce((sum, r) => sum + r.count, 0)
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+        <div>
+          <h2 className="text-xl font-semibold text-neutral-900 dark:text-white">Filtered Traffic</h2>
+          <p className="text-sm text-neutral-500 dark:text-neutral-400 mt-1">
+            {totalBlocked.toLocaleString()} spam referrers blocked in the last {days} days
+          </p>
+        </div>
+        <div className="flex gap-2">
+          {[7, 30, 90].map((d) => (
+            <button
+              key={d}
+              onClick={() => setDays(d)}
+              className={`px-3 py-1.5 text-sm rounded-lg transition-colors ${
+                days === d
+                  ? 'bg-neutral-900 text-white dark:bg-white dark:text-neutral-900'
+                  : 'bg-neutral-100 text-neutral-600 hover:bg-neutral-200 dark:bg-neutral-800 dark:text-neutral-400 dark:hover:bg-neutral-700'
+              }`}
+            >
+              {d}d
+            </button>
+          ))}
+        </div>
+      </div>
+
+      <div className="rounded-2xl border border-neutral-200 dark:border-neutral-800 bg-white dark:bg-neutral-900 shadow-sm overflow-hidden">
+        {referrers.length === 0 ? (
+          <div className="p-12 text-center text-neutral-500 dark:text-neutral-400">
+            No filtered referrers in this period
+          </div>
+        ) : (
+          <table className="w-full text-left text-sm">
+            <thead className="border-b border-neutral-200 dark:border-neutral-800">
+              <tr>
+                <th className="px-4 py-3 font-medium text-neutral-500 dark:text-neutral-400">Domain</th>
+                <th className="px-4 py-3 font-medium text-neutral-500 dark:text-neutral-400">Reason</th>
+                <th className="px-4 py-3 font-medium text-neutral-500 dark:text-neutral-400 text-right">Blocked</th>
+              </tr>
+            </thead>
+            <tbody className="divide-y divide-neutral-200 dark:divide-neutral-800">
+              {referrers.map((r) => (
+                <tr key={`${r.domain}-${r.reason}`} className="hover:bg-neutral-50 dark:hover:bg-neutral-900/50">
+                  <td className="px-4 py-3 text-neutral-900 dark:text-white font-mono text-xs">{r.domain}</td>
+                  <td className="px-4 py-3">
+                    <span className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium ${
+                      r.reason === 'blocklist'
+                        ? 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400'
+                        : 'bg-amber-100 text-amber-700 dark:bg-amber-900/30 dark:text-amber-400'
+                    }`}>
+                      {r.reason}
+                    </span>
+                  </td>
+                  <td className="px-4 py-3 text-right text-neutral-900 dark:text-white tabular-nums">
+                    {r.count.toLocaleString()}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        )}
+      </div>
+    </div>
+  )
+}

app/admin/page.tsx

@@ -15,6 +15,16 @@ export default function AdminDashboard() {
           View all organizations, check billing status, and manually grant plans.
         </p>
       </Link>
+      <Link
+        href="/admin/filtered-traffic"
+        className="block transition-transform hover:scale-[1.02] rounded-2xl border border-neutral-200 dark:border-neutral-800 bg-white dark:bg-neutral-900 p-6 shadow-sm"
+      >
+        <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">Filtered Traffic</h3>
+        <p className="text-sm text-neutral-500 dark:text-neutral-400 mt-1">Monitor blocked referrer spam</p>
+        <p className="text-sm text-neutral-500 dark:text-neutral-400 mt-4">
+          View domains blocked by the spam filter and check for false positives.
+        </p>
+      </Link>
     </div>
   )
 }

lib/api/admin.ts

@@ -60,3 +60,18 @@ export async function grantPlan(orgId: string, params: GrantPlanParams): Promise
     body: JSON.stringify(params),
   })
 }
+
+export interface FilteredReferrer {
+  domain: string
+  reason: string
+  count: number
+}
+
+export async function getFilteredReferrers(startDate?: string, endDate?: string): Promise<FilteredReferrer[]> {
+  const params = new URLSearchParams()
+  if (startDate) params.set('start_date', startDate)
+  if (endDate) params.set('end_date', endDate)
+  const query = params.toString() ? `?${params.toString()}` : ''
+  const data = await authFetch<{ filtered_referrers: FilteredReferrer[] }>(`/api/admin/filtered-referrers${query}`)
+  return data.filtered_referrers || []
+}