refactor(converter): split converter card into modular section components

components/converter/converter-card.constants.ts

@@ -0,0 +1,22 @@
+import type { MarketChartRange } from "@/lib/market";
+
+export const DEFAULT_FROM = "USD";
+export const DEFAULT_TO = "BTC";
+export const QUICK_AMOUNTS = [10, 50, 100, 500, 1000] as const;
+export const DEFAULT_MULTI_CONVERSION_CODES = [
+  "USD",
+  "EUR",
+  "BTC",
+  "ETH",
+  "SOL",
+] as const;
+export const MAX_MULTI_CONVERSIONS = 4;
+export const MAX_PINNED_PAIRS = 6;
+
+export const MARKET_RANGE_LABELS: Record<MarketChartRange, string> = {
+  "24h": "24h",
+  "7d": "7d",
+  "30d": "30d",
+  "1y": "1y",
+  all: "all",
+};