refactor: pecah lib/api.ts dan constants/Styles.ts per domain

- lib/api.ts (879 baris) → 13 file di lib/api/ per domain
- constants/Styles.ts (1.275 baris) → 10 file di constants/styles/ per domain
- tambah docs/FILE-HEALTH.md dan referensinya ke CLAUDE.md
- kedua file lama tetap sebagai re-export — zero breaking changes

constants/styles/input.styles.ts

@@ -0,0 +1,35 @@
+import { StyleSheet } from "react-native";
+
+const InputStyles = StyleSheet.create({
+   inputRoundForm: {
+      borderRadius: 5,
+      borderColor: '#d6d8f6',
+      borderWidth: 1,
+      paddingVertical: 10,
+      paddingHorizontal: 15,
+   },
+   inputRoundFormLeft: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      paddingVertical: 0,
+   },
+   inputRoundFormRight: {
+      flexDirection: 'row-reverse',
+      alignItems: 'center',
+      paddingVertical: 0,
+      justifyContent: 'space-between',
+   },
+   verificationCell: {
+      width: 50,
+      height: 50,
+      lineHeight: 45,
+      fontSize: 24,
+      borderWidth: 1,
+      borderRadius: 15,
+      borderColor: 'gray',
+      textAlign: 'center',
+   },
+   verificationFocusCell: { borderColor: '#19345E' },
+});
+
+export default InputStyles;