fix(node-player): use IndexedDB for SW token instead of postMessage

postMessage is unreliable on first load — SW may not be active yet.
IndexedDB is shared between page and SW, so the token is always
available regardless of SW lifecycle timing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

furumi-node-player/client/public/sw.js

@@ -1,22 +1,44 @@
-let bearerToken = null
+const DB_NAME = 'furumi-sw'
+const STORE = 'auth'
+const KEY = 'bearer'
 
-self.addEventListener('message', (e) => {
-  if (e.data?.type === 'SET_TOKEN') {
-    bearerToken = e.data.token
+function openDB() {
+  return new Promise((resolve, reject) => {
+    const req = indexedDB.open(DB_NAME, 1)
+    req.onupgradeneeded = () => req.result.createObjectStore(STORE)
+    req.onsuccess = () => resolve(req.result)
+    req.onerror = () => reject(req.error)
+  })
+}
+
+async function getToken() {
+  try {
+    const db = await openDB()
+    return new Promise((resolve) => {
+      const tx = db.transaction(STORE, 'readonly')
+      const req = tx.objectStore(STORE).get(KEY)
+      req.onsuccess = () => resolve(req.result || null)
+      req.onerror = () => resolve(null)
+    })
+  } catch {
+    return null
   }
-})
+}
 
 self.addEventListener('fetch', (e) => {
   const url = new URL(e.request.url)
-  // Only intercept /api/ requests to the same origin
   if (url.origin !== self.location.origin || !url.pathname.startsWith('/api/')) return
-  if (!bearerToken) return
 
-  const authedRequest = new Request(e.request, {
-    headers: new Headers(e.request.headers),
-  })
-  authedRequest.headers.set('Authorization', `Bearer ${bearerToken}`)
-  e.respondWith(fetch(authedRequest))
+  e.respondWith(
+    (async () => {
+      const token = await getToken()
+      if (!token) return fetch(e.request)
+
+      const headers = new Headers(e.request.headers)
+      headers.set('Authorization', `Bearer ${token}`)
+      return fetch(new Request(e.request, { headers }))
+    })()
+  )
 })
 
 self.addEventListener('install', () => self.skipWaiting())

furumi-node-player/client/src/furumiApi.ts

@@ -9,11 +9,14 @@ export const furumiApi = axios.create({
 })
 
 function sendTokenToSW(token: string) {
-  navigator.serviceWorker?.controller?.postMessage({ type: 'SET_TOKEN', token })
-  // Also send to waiting/installing SW
-  navigator.serviceWorker?.ready.then((reg) => {
-    reg.active?.postMessage({ type: 'SET_TOKEN', token })
-  })
+  try {
+    const req = indexedDB.open('furumi-sw', 1)
+    req.onupgradeneeded = () => req.result.createObjectStore('auth')
+    req.onsuccess = () => {
+      const tx = req.result.transaction('auth', 'readwrite')
+      tx.objectStore('auth').put(token, 'bearer')
+    }
+  } catch { /* ignore */ }
 }
 
 export function setAuthToken(token: string) {