feat(costs): add billing, quota, and budget control plane

ui/src/components/FinanceKindCard.tsx

@@ -0,0 +1,43 @@
+import type { FinanceByKind } from "@paperclipai/shared";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { financeEventKindDisplayName, formatCents } from "@/lib/utils";
+
+interface FinanceKindCardProps {
+  rows: FinanceByKind[];
+}
+
+export function FinanceKindCard({ rows }: FinanceKindCardProps) {
+  return (
+    <Card>
+      <CardHeader className="px-4 pt-4 pb-1">
+        <CardTitle className="text-base">Financial event mix</CardTitle>
+        <CardDescription>Account-level charges grouped by event kind.</CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-2 px-4 pb-4 pt-3">
+        {rows.length === 0 ? (
+          <p className="text-sm text-muted-foreground">No finance events in this period.</p>
+        ) : (
+          rows.map((row) => (
+            <div
+              key={row.eventKind}
+              className="flex items-center justify-between gap-3 border border-border px-3 py-2"
+            >
+              <div className="min-w-0">
+                <div className="truncate text-sm font-medium">{financeEventKindDisplayName(row.eventKind)}</div>
+                <div className="text-xs text-muted-foreground">
+                  {row.eventCount} event{row.eventCount === 1 ? "" : "s"} · {row.billerCount} biller{row.billerCount === 1 ? "" : "s"}
+                </div>
+              </div>
+              <div className="text-right tabular-nums">
+                <div className="text-sm font-medium">{formatCents(row.netCents)}</div>
+                <div className="text-xs text-muted-foreground">
+                  {formatCents(row.debitCents)} debits
+                </div>
+              </div>
+            </div>
+          ))
+        )}
+      </CardContent>
+    </Card>
+  );
+}