[F] Fix settings persistence

src/lib/ui/player/state.svelte.ts

@@ -0,0 +1,24 @@
+import { API } from "$lib/client"
+import { typingSettingsDefault, type TypingSettings, type UserData } from "$lib/types"
+
+export class UserDataSync {
+  settings = $state<TypingSettings>(typingSettingsDefault)
+  loc = $state<UserData['loc']>(undefined)
+
+  constructor(data: any) {
+    this.settings = data.user.data?.typingSettings ?? typingSettingsDefault
+    this.loc = data.user.data.loc
+
+    $effect(() => {
+      data.user.data = data.user.data || {}
+      data.user.data.typingSettings = this.settings
+      API.saveUserData({ typingSettings: this.settings })
+    })
+
+    $effect(() => {
+      data.user.data = data.user.data || {}
+      data.user.data.loc = this.loc
+      API.saveUserData({ loc: this.loc })
+    })
+  }
+}

src/routes/song/[id]/+page.svelte

@@ -6,19 +6,15 @@
   import ProgressList from "$lib/ui/ProgressList.svelte"
   import { goto } from "$app/navigation"
   import { getI18n, useMsg } from "$lib/i18n"
-  import { typingSettingsDefault } from "$lib/types"
   import { getNextSong } from "$lib/ui/player/SongSwitching.js"
+  import { UserDataSync } from "$lib/ui/player/state.svelte"
 
   const t = getI18n().song.mode
   const getMsg = useMsg()
 
   let { data } = $props()
   
-  let settings = $state(data.user.data?.typingSettings ?? typingSettingsDefault)
-  $effect(() => { API.saveUserData({ typingSettings: settings }) })
-
-  let loc = $state(data.user.data.loc)
-  $effect(() => { API.saveUserData({ loc }) })
+  const ud = new UserDataSync(data)
 
   let taskStatus = $state({
     lyrics: false,
@@ -89,7 +85,7 @@
   }
 </script>
 
-<PlayerAppBar song={data.song} bind:settings bind:loc playlist={data.playlist} />
+<PlayerAppBar song={data.song} bind:settings={ud.settings} bind:loc={ud.loc} playlist={data.playlist} />
 
 <ProgressList percentage={progressPercentage} items={progressItems} />
 

src/routes/song/[id]/karaoke/+page.svelte

@@ -1,13 +1,13 @@
 <script lang="ts">
   import type { PageProps } from "./$types"
   import { onMount } from "svelte"
-  import { typingSettingsDefault } from "$lib/types"
   import { processLrcLine, dedupLines, type ProcLrcLine } from "$lib/ui/player/IMEHelper"
   import "$lib/ext.ts"
   import { API } from "$lib/client"
   import { MusicControl } from "$lib/ui/player/MusicControl"
   import Lyrics from "$lib/ui/player/Lyrics.svelte"
   import PlayerAppBar from "$lib/ui/player/PlayerAppBar.svelte"
+  import { UserDataSync } from "$lib/ui/player/state.svelte"
   import { getI18n } from "$lib/i18n"
     import { Layer } from "m3-svelte";
 
@@ -16,11 +16,7 @@
   let { data }: PageProps = $props()
 
   let li = $state(0)
-  let settings = $state(data.user.data?.typingSettings ?? typingSettingsDefault)
-  $effect(() => { API.saveUserData({ typingSettings: settings }) })
-
-  let loc = $state(data.user.data.loc)
-  $effect(() => { API.saveUserData({ loc }) })
+  const ud = new UserDataSync(data)
 
   let vocalsVolume = $state(data.user.data.vocalsVolume ?? 100)
   $effect(() => { 
@@ -31,7 +27,7 @@
   let isPlaying = $state(false)
 
   // Process lyrics
-  const isHideRepeated = $derived(settings.hideRepeated)
+  const isHideRepeated = $derived(ud.settings.hideRepeated)
   let deduplicatedLyrics = $derived(dedupLines(data.lrc, isHideRepeated))
   let processedLrc: ProcLrcLine[] = $derived(deduplicatedLyrics.map(line => processLrcLine(line.lyric)))
   
@@ -91,7 +87,7 @@
 
 <svelte:window onclick={() => musicControl?.ready()} onkeydown={() => musicControl?.ready()}/>
 
-<PlayerAppBar song={data.song} bind:settings bind:loc showRomajiOnError={false} isKaraoke={true} disableHideRepeated playlist={data.playlist} />
+<PlayerAppBar song={data.song} bind:settings={ud.settings} bind:loc={ud.loc} showRomajiOnError={false} isKaraoke={true} disableHideRepeated playlist={data.playlist} />
 
 <div class="vbox p-content py-4 gap-2 mfg-on-surface-variant">
   {#if data.audioData.vocalsUrl}
@@ -113,7 +109,7 @@
   </div>
 </div>
 
-<Lyrics lines={processedLrc} currentLineIndex={li} {settings} {states} />
+<Lyrics lines={processedLrc} currentLineIndex={li} settings={ud.settings} {states} />
 
 <button
   class="fixed bottom-6 right-6 z-5 size-64px cbox rounded-full surface-variant mbg-surface-container mfg-on-surface-variant shadow-lg hover:shadow-xl transition-all active:scale-90"

src/routes/song/[id]/play/+page.svelte

@@ -12,6 +12,7 @@
   import Lyrics from "$lib/ui/player/Lyrics.svelte"
   import PlayerAppBar from "$lib/ui/player/PlayerAppBar.svelte"
   import { getI18n } from "$lib/i18n"
+  import { UserDataSync } from "$lib/ui/player/state.svelte"
 
   const t = getI18n().song.play
 
@@ -25,15 +26,10 @@
   let inp = $state("")
 
   // Settings stored in user data
-  let settings = $state(data.user.data?.typingSettings ?? typingSettingsDefault)
-  $effect(() => { API.saveUserData({ typingSettings: settings }) })
-
-  // Playlist location state
-  let loc = $state(data.user.data.loc)
-  $effect(() => { API.saveUserData({ loc }) })
+  const ud = new UserDataSync(data)
 
   // Process each line into segments with swi (start word index) and kanji/kana
-  const isHideRepeated = $derived(settings.hideRepeated && !data.audioUrl)
+  const isHideRepeated = $derived(ud.settings.hideRepeated && !data.audioUrl)
   let deduplicatedLyrics = $derived(dedupLines(data.lrc, isHideRepeated))
   let processedLrc: ProcLrcLine[] = $derived(deduplicatedLyrics.map(line => processLrcLine(line.lyric)))
   // State tracking for each kana character: UNSEEN, RIGHT, WRONG
@@ -146,10 +142,10 @@
       totalTyped, totalRight, startTime, statsHistory
     })
 
-    if (loc?.currentPlaylistId) {
-      loc.isFinished = true
-      loc.lastResultId = res.id
-      await API.saveUserData({ loc })
+    if (ud.loc) {
+      ud.loc.isFinished = true
+      ud.loc.lastResultId = res.id
+      await API.saveUserData({ loc: ud.loc })
     }
 
     goto(`/results/${res.id}`, { replaceState: true })
@@ -158,7 +154,7 @@
 
 <svelte:window onclick={() => musicControl?.ready()} onkeydown={() => musicControl?.ready()}/>
 
-<PlayerAppBar song={data.song} bind:settings bind:loc disableHideRepeated={!!data.audioUrl} playlist={data.playlist} />
+<PlayerAppBar song={data.song} bind:settings={ud.settings} bind:loc={ud.loc} disableHideRepeated={!!data.audioUrl} playlist={data.playlist} />
 
 <LinearProgress percent={progress} />
 
@@ -180,4 +176,4 @@
 </div>
 
 <!-- Lines -->
-<Lyrics lines={processedLrc} currentLineIndex={li} currentWordIndex={wi} {states} {settings} showCaret={true} onLineClick={() => hiddenInput.focus()} />
+<Lyrics lines={processedLrc} currentLineIndex={li} currentWordIndex={wi} {states} settings={ud.settings} showCaret={true} onLineClick={() => hiddenInput.focus()} />