Add 5-second auto-refresh for dashboard Activity feed

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

src/server/routers/dashboard.ts

@@ -553,4 +553,22 @@ export const dashboardRouter = router({
 
       return evaluations
     }),
+
+  getRecentActivity: adminProcedure
+    .input(z.object({ limit: z.number().int().min(1).max(20).optional() }))
+    .query(async ({ ctx, input }) => {
+      const sevenDaysAgo = new Date(Date.now() - 7 * 24 * 60 * 60 * 1000)
+      return ctx.prisma.auditLog.findMany({
+        where: { timestamp: { gte: sevenDaysAgo } },
+        orderBy: { timestamp: 'desc' },
+        take: input.limit ?? 8,
+        select: {
+          id: true,
+          action: true,
+          entityType: true,
+          timestamp: true,
+          user: { select: { name: true } },
+        },
+      })
+    }),
 })