chore: initialize monorepo with project scaffolding, configs, and CI setup

apps/explorer-web/src/lib/models.ts

@@ -0,0 +1,57 @@
+export interface BlockSummary {
+  height: number;
+  hash: string;
+  timestamp: string;
+  txCount: number;
+  proposer: string;
+}
+
+export interface BlockListResponse {
+  items: BlockSummary[];
+  next_offset?: number | string | null;
+}
+
+export interface TransactionSummary {
+  hash: string;
+  block: number | string;
+  from: string;
+  to: string | null;
+  value: string;
+  status: string;
+}
+
+export interface TransactionListResponse {
+  items: TransactionSummary[];
+  next_offset?: number | string | null;
+}
+
+export interface AddressSummary {
+  address: string;
+  balance: string;
+  txCount: number;
+  lastActive: string;
+  recentTransactions?: string[];
+}
+
+export interface AddressDetailResponse extends AddressSummary {}
+export interface AddressListResponse {
+  items: AddressSummary[];
+  next_offset?: number | string | null;
+}
+
+export interface ReceiptSummary {
+  receiptId: string;
+  miner: string;
+  coordinator: string;
+  issuedAt: string;
+  status: string;
+  payload?: {
+    minerSignature?: string;
+    coordinatorSignature?: string;
+  };
+}
+
+export interface ReceiptListResponse {
+  jobId: string;
+  items: ReceiptSummary[];
+}