fix: rendre le proxy MIZIK plus robuste et tolérer l'ancien nommage des credentials

app/api/mizik-stream/[id]/__tests__/route.test.js

@@ -4,6 +4,7 @@ import {GET} from '../route'
 function fakeUpstreamResponse({status = 200, headers = {}, body = 'audio-bytes'} = {}) {
   return {
     status,
+    ok: status >= 200 && status < 300,
     body,
     headers: {
       get: key => headers[key.toLowerCase()] ?? null
@@ -52,4 +53,16 @@ describe('GET /api/mizik-stream/[id]', () => {
     expect(response.status).toBe(200)
     expect(response.headers.get('content-type')).toBe('audio/mpeg')
   })
+
+  it('renvoie une erreur JSON si le serveur audio répond en erreur', async () => {
+    global.fetch = vi.fn(async () => fakeUpstreamResponse({status: 401, headers: {'content-type': 'application/json'}, body: '{"error": "unauthorized"}'}))
+
+    const request = new Request('http://localhost/api/mizik-stream/7')
+    const response = await GET(request, {params: Promise.resolve({id: '7'})})
+
+    expect(response.status).toBe(401)
+    expect(response.headers.get('content-type')).toContain('application/json')
+    const json = await response.json()
+    expect(json.error).toContain('401')
+  })
 })