diff --git a/src/api/overseas.js b/src/api/overseas.js
index 0171768..c792931 100644
--- a/src/api/overseas.js
+++ b/src/api/overseas.js
@@ -40,10 +40,19 @@ async function tokenAfterUnauthorized(failedToken) {
 	return refreshOverseasToken()
 }
 
+function overseasUrl(path) {
+	const base = String(session.apiBase || '').replace(/\/$/, '')
+	const value = `/${String(path || '').replace(/^\/+/, '')}`
+	const normalized = /\/(?:api|overseas-api)$/.test(base)
+		? value.replace(/^\/api(?=\/)/, '')
+		: value
+	return `${base}${normalized}`
+}
+
 function rawRequest(method, path, data, token) {
 	return new Promise((resolve, reject) => {
 		uni.request({
-			url: `${session.apiBase}${path}`,
+			url: overseasUrl(path),
 			method,
 			data,
 			header: { Accept: 'application/json', Authorization: `Bearer ${token}` },
@@ -72,7 +81,7 @@ export async function overseasRequest(method, path, data, retry = true) {
 function rawUpload(path, filePath, name, token) {
 	return new Promise((resolve, reject) => {
 		uni.uploadFile({
-			url: `${session.apiBase}${path}`,
+			url: overseasUrl(path),
 			filePath,
 			name,
 			header: { Authorization: `Bearer ${token}` },
@@ -82,14 +91,6 @@ function rawUpload(path, filePath, name, token) {
 	})
 }
 
-function overseasUrl(path) {
-	const value = String(path || '')
-	const normalized = /\/(?:api|overseas-api)$/.test(session.apiBase)
-		? value.replace(/^\/api(?=\/)/, '')
-		: value
-	return `${session.apiBase}${normalized}`
-}
-
 function rawDownload(path, token) {
 	return new Promise((resolve, reject) => {
 		uni.downloadFile({
diff --git a/src/api/pallet.js b/src/api/pallet.js
index 50a596d..8393493 100644
--- a/src/api/pallet.js
+++ b/src/api/pallet.js
@@ -1,6 +1,6 @@
 import { overseasRequest } from './overseas.js'
 
-const BASE = '/api/pda/v1/last-leg/pallet-operations'
+const BASE = '/pda/v1/last-leg/pallet-operations'
 
 export function resolvePallet(code) {
 	return overseasRequest('POST', `${BASE}/pallets/resolve`, { code: String(code || '').trim() })
diff --git a/tests/overseas-request.test.mjs b/tests/overseas-request.test.mjs
index c48eb39..aea38d3 100644
--- a/tests/overseas-request.test.mjs
+++ b/tests/overseas-request.test.mjs
@@ -2,6 +2,7 @@ import test from 'node:test'
 import assert from 'node:assert/strict'
 
 import { overseasDownload, overseasRequest, overseasUpload, resetOverseasRequestStateForTest } from '../src/api/overseas.js'
+import { resolvePallet } from '../src/api/pallet.js'
 import { PDA_AUTHORITY, PDA_ROLE, session, signInWithTokens, signOut } from '../src/stores/session.js'
 
 const future = () => Math.floor(Date.now() / 1000) + 3600
@@ -34,6 +35,38 @@ const denied = (requestId = 'request-401', traceId = 'trace-401') => ({
 	statusCode: 401, data: { code: 'A0401', message: 'expired', requestId, traceId }, header: {}
 })
 
+test('H5 proxy and App API roots normalize request upload and download paths to one public api prefix', async () => {
+	prepareSession()
+	const requests = []; const uploads = []; const downloads = []
+	globalThis.uni.request = (options) => { requests.push(options.url); options.success(ok({ palletCode: 'PLT-1' })) }
+	globalThis.uni.uploadFile = (options) => { uploads.push(options.url); options.success({ statusCode: 200, data: JSON.stringify({ code: '200', data: { fileId: '1' } }), header: {} }) }
+	globalThis.uni.downloadFile = (options) => { downloads.push(options.url); options.success({ statusCode: 200, tempFilePath: '/tmp/photo.jpg', header: {} }) }
+
+	session.apiBase = '/overseas-api'
+	await resolvePallet('PLT-1')
+	await overseasUpload('/api/pda/v1/last-leg/photos/files', '/tmp/photo.jpg')
+	await overseasDownload('/api/pda/v1/last-leg/photos/files/1/download')
+
+	session.apiBase = 'https://overseas.example.com/api/'
+	await resolvePallet('PLT-1')
+	await overseasUpload('/api/pda/v1/last-leg/photos/files', '/tmp/photo.jpg')
+	await overseasDownload('/api/pda/v1/last-leg/photos/files/1/download')
+
+	assert.deepEqual(requests, [
+		'/overseas-api/pda/v1/last-leg/pallet-operations/pallets/resolve',
+		'https://overseas.example.com/api/pda/v1/last-leg/pallet-operations/pallets/resolve'
+	])
+	assert.deepEqual(uploads, [
+		'/overseas-api/pda/v1/last-leg/photos/files',
+		'https://overseas.example.com/api/pda/v1/last-leg/photos/files'
+	])
+	assert.deepEqual(downloads, [
+		'/overseas-api/pda/v1/last-leg/photos/files/1/download',
+		'https://overseas.example.com/api/pda/v1/last-leg/photos/files/1/download'
+	])
+	for (const url of [...requests, ...uploads, ...downloads]) assert.doesNotMatch(url, /\/api\/api\//)
+})
+
 test('concurrent old-token 401 responses share one refresh and each replay once with the atomically replaced token', async () => {
 	const old = prepareSession(); const next = tokens('new')
 	let refreshCount = 0; let oldCalls = 0; let newCalls = 0
diff --git a/tests/pallet-operations.test.mjs b/tests/pallet-operations.test.mjs
index cf357ac..a849faa 100644
--- a/tests/pallet-operations.test.mjs
+++ b/tests/pallet-operations.test.mjs
@@ -21,6 +21,8 @@ test('pallet API maps only the frozen overseas PDA operation endpoints', async (
 		assert.match(api, new RegExp(path.replace('/', '\\/')))
 	}
 	assert.match(api, /overseasRequest/)
+	assert.match(api, /const BASE = '\/pda\/v1\/last-leg\/pallet-operations'/)
+	assert.doesNotMatch(api, /const BASE = '\/api\/pda/)
 	for (const forbidden of ['customerId', 'warehouseId', 'locationId']) assert.doesNotMatch(api, new RegExp(forbidden))
 })