feat(insights): committed/discretionary chart, recurring charge detection, fees & interest audit

src/lib/hooks.ts

@@ -502,3 +502,58 @@ export function useMonthlyAnalytics(months?: number) {
     },
   });
 }
+
+export interface SubscriptionRow {
+  merchant: string;
+  category: string;
+  frequency: string;
+  avg_amount: number;
+  monthly_equiv: number;
+  first_seen: string;
+  last_seen: string;
+  occurrences: number;
+  total_paid: number;
+  is_active: boolean;
+}
+
+export function useSubscriptions() {
+  return useQuery<{ subscriptions: SubscriptionRow[]; total_monthly_equiv: number }>({
+    queryKey: ["analytics", "subscriptions"],
+    queryFn: async () => {
+      const res = await fetch("/api/analytics/subscriptions");
+      return res.json();
+    },
+  });
+}
+
+export interface FeeBankRow {
+  bank_name: string;
+  fees: number;
+  interest: number;
+  total: number;
+}
+
+export interface FeeTxnRow {
+  id: number;
+  transaction_date: string;
+  description: string;
+  merchant_name: string | null;
+  transaction_type: string;
+  my_amount: number;
+  bank_name: string;
+}
+
+export function useFees() {
+  return useQuery<{
+    by_bank: FeeBankRow[];
+    transactions: FeeTxnRow[];
+    total_fees: number;
+    total_interest: number;
+  }>({
+    queryKey: ["analytics", "fees"],
+    queryFn: async () => {
+      const res = await fetch("/api/analytics/fees");
+      return res.json();
+    },
+  });
+}