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

lib/api/auth.api.ts

@@ -0,0 +1,46 @@
+import Constants from 'expo-constants';
+import api from './client';
+
+export const apiCheckPhoneLogin = async (body: { phone: string }) => {
+   const response = await api.post('/auth/login', body)
+   return response.data;
+}
+
+export const apiSendOtp = async (body: { phone: string, otp: number }) => {
+   const message = "Desa+\nMasukkan kode ini " + body.otp + " pada aplikasi Desa+ anda. Jangan berikan pada siapapun."
+   const res = await fetch(
+      `${Constants.expoConfig?.extra?.URL_OTP}/api/wa/send-text`,
+      {
+         method: 'POST',
+         headers: {
+            'Content-Type': 'application/json',
+            Authorization: `Bearer ${Constants.expoConfig?.extra?.WA_SERVER_TOKEN}`,
+         },
+         body: JSON.stringify({
+            number: body.phone,
+            text: message
+         })
+      }
+   );
+   return res.status
+}
+
+export const apiRegisteredToken = async (data: { user: string, token: string, category?: string }) => {
+   const response = await api.post(`/mobile/auth-token`, data)
+   return response.data;
+};
+
+export const apiUnregisteredToken = async (data: { user: string, token: string, category?: string }) => {
+   const response = await api.put(`/mobile/auth-token`, data)
+   return response.data;
+};
+
+export const apiGetCheckToken = async (data: { user: string, token: string }) => {
+   const response = await api.post(`mobile/auth-token/check`, data);
+   return response.data;
+};
+
+export const apiGetVersion = async () => {
+   const response = await api.get(`mobile/version`);
+   return response.data;
+};