iOS 1.0.12: more space between seek bar and transport buttons

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitignore

@@ -22,3 +22,4 @@ ios/build/
 ios/Stemify.xcodeproj/
 ios/Stemify/Info.plist
 ios/Stemify/Stemify.entitlements
+ios/prov

README.md

@@ -30,6 +30,12 @@ The stems folder mirrors the music folder. If a song lives at `Kansas/Leftovertu
   Plex Media Server :32400 ───────────────────────────────▶ library, artwork, playlists
 ```
 
+Three parts, and only stemd is required:
+
+- **stemd** is the daemon. It does the actual separating and nothing else.
+- **Stemify web UI** is optional, for desktop users. stemserve serves it at `/`. It plays the stems streamed from the server, and picks up a local stem server on `localhost:8765` by itself.
+- **iOS and Android apps** are optional and built from this repo too.
+
 - **stemd** works through the library on the GPU, one song at a time, and rescans every 30 minutes for new music.
 - **stemserve** serves the finished stems over HTTP with range requests, waveforms and optional Opus transcodes.
 - **Plex** handles the library, metadata, artwork and playlists.
@@ -37,19 +43,21 @@ The stems folder mirrors the music folder. If a song lives at `Kansas/Leftovertu
 
 ## Apps
 
-| | iOS | Android | Desktop player |
+| | iOS | Android | Desktop player | Web |
-|---|---|---|---|
+|---|---|---|---|---|
-| Per-stem faders, mute, solo, mix presets | yes | yes | yes |
+| Per-stem faders, mute, solo, mix presets | yes | yes | yes | yes |
-| Waveform seek bar, live stem meters | yes | yes | |
+| Waveform seek bar, live stem meters | yes | yes | | waveform |
-| Saved mix per song | yes | | |
+| Shuffle, repeat all/one | yes | yes | | yes |
-| Karaoke mode with synced lyrics | yes | | |
+| Playback speed (keeps pitch) | yes | | | yes |
-| Stem playlists (a mix per song) | yes | | |
+| Saved mix per song | yes | | | |
-| Plex playlists | yes | yes | yes |
+| Karaoke mode with synced lyrics | yes | | | |
-| Downloads for offline | yes | yes | |
+| Stem playlists (a mix per song) | yes | | | |
-| 10-band and parametric EQ, AutoEQ import | yes | yes | |
+| Plex playlists | yes | yes | yes | yes |
-| Car | CarPlay | Android Auto | |
+| Downloads for offline | yes | yes | | |
-| Voice | Siri | Google Assistant | |
+| 10-band and parametric EQ, AutoEQ import | yes | yes | | |
-| Stem Now | yes | yes | |
+| Car | CarPlay | Android Auto | | |
+| Voice | Siri | Google Assistant | | |
+| Stem Now | yes | yes | | |
 
 Mix presets are Full, Karaoke, A Cappella, No Drums, Rhythm, No Guitar and No Bass.
 
@@ -85,10 +93,10 @@ docker run -d --name stemd --restart unless-stopped --stop-timeout 60 \
 
 The first song downloads the model (about 700 MB). After that the log shows what's left, what it's on, and how fast it's going.
 
-**stemserve** is one Python file using only the standard library. Copy `server/` to `/mnt/user/appdata/stemserve` and run `docker compose up -d --build` there, or by hand:
+**stemserve** is one Python file using only the standard library. It also serves the web player from `web/`. Copy the repo's `server/` and `web/` folders to `/mnt/user/appdata/stemserve` and run `docker compose up -d --build` in `server/`, or by hand:
 
 ```sh
-docker build -t stemserve /mnt/user/appdata/stemserve
+docker build -f /mnt/user/appdata/stemserve/server/Dockerfile -t stemserve /mnt/user/appdata/stemserve
 docker run -d --name stemserve --restart unless-stopped -p 8765:8765 \
   -v /mnt/user/Music/Stems:/stems:ro \
   -v /mnt/user/appdata/stemserve/cache:/cache \
@@ -130,6 +138,9 @@ To update, copy the new files, rebuild, `docker rm -f` the container and run it
 | `PORT` | `8765` | Listen port |
 | `TOKEN` | empty | If set, requests need `X-Stem-Token` or `?token=` |
 | `INDEX_TTL` | `30` | Seconds between rescans of the stems folder |
+| `PLEX_URL` | empty | Plex address. With `PLEX_TOKEN`, the web UI connects to Plex without signing in |
+| `PLEX_TOKEN` | empty | Plex token. Only handed out to clients that pass `TOKEN`, so set `TOKEN` too |
+| `WEB` | `1` | Set to `0` to turn off the web UI and serve the API only |
 
 </details>
 
@@ -158,6 +169,7 @@ CarPlay and Siri need the `carplay-audio` and `siri` entitlements, which a free
 
 ### Using it
 
+- **Now Playing:** shuffle and repeat sit either side of the play controls; tap repeat again for repeat one. The speed button (next to the mixer) goes from 0.5× to 2× without changing pitch.
 - **Mixer:** on Now Playing, under the waveform. Tap **Save** to keep a mix for that song; it comes back every time the song plays.
 - **Karaoke:** the mic button mutes vocals on every song and shows synced lyrics from [LRCLIB](https://lrclib.net). Tap a line to jump to it. Vocals can be On, Soft or Off, and Soft has a slider for how quiet.
 - **Playlists:** the Playlists tab switches between Plex and Stem.
@@ -211,6 +223,18 @@ adb forward tcp:5277 tcp:5277
 ~/Android/Sdk/extras/google/auto/desktop-head-unit -c ~/Android/Sdk/extras/google/auto/config/rotary.ini
 ```
 
+## Web
+
+stemserve also serves a web player at its root, so `http://<server>:8765/` opens it. Sign in with Plex in Settings (or paste a server URL and token), then browse albums, artists, playlists and search like the apps. **Stems only** lists everything in the stems folder and works without Plex.
+
+- Mixer, presets, shuffle, repeat, speed, queue and the waveform seek bar work like the phone apps. The mix carries over to the next song.
+- Songs without stems play straight from Plex.
+- Keys: Space play/pause, arrows seek, S shuffle, R repeat, `[` `]` speed, M mixer, Q queue.
+- Settings, queue and mix are kept in the browser. Nothing syncs with the apps.
+- If stemserve has `TOKEN` set, enter it in Settings.
+
+It's plain HTML and JavaScript in `web/` with no build step. To run it somewhere else, serve `web/` and proxy `/api/` and `/file/` to stemserve on the same origin; with a different origin the stem faders fall back to element volume, which iOS Safari ignores.
+
 ## Desktop
 
 Linux, Python 3.12 and [uv](https://docs.astral.sh/uv/). PyTorch defaults to ROCm (AMD); point the torch index in `pyproject.toml` elsewhere for NVIDIA or CPU.
@@ -274,6 +298,7 @@ Stems/Kansas/Leftoverture/01 Carry On Wayward Son/
 | `POST /api/prepare?key=K&fmt=opus&br=256` | Starts Opus transcodes in the background |
 | `POST /api/stem` with `{"paths": [...]}` | Stem Now for these Plex files |
 | `GET /file/K/<file>.flac[?fmt=opus&br=256]` | The stem, with range support |
+| `GET /` | The web player from `web/` (or `WEB_DIR`), no token needed |
 
 `K` is the song's folder under the stems root, like `Kansas/Leftoverture/01 Carry On Wayward Son`. Outside Docker:
 
@@ -289,6 +314,7 @@ ios/                  iOS and CarPlay app (SwiftUI, xcodegen project)
   scripts/            build-ipa.sh, make-source.py
 android/              Android and Android Auto app (Kotlin, Compose, Media3)
 server/               stemd.py, stemserve.py, Dockerfiles, compose file
+web/                  web player (served by stemserve)
 stemify/              desktop separator (PySide6 + QML) and shared separation code
   worker/             Demucs and RoFormer backends, run in a separate process
   player/             Stemify Player

ios/Stemify/UI/Screens/NowPlayingScreen.swift

@@ -173,6 +173,7 @@ struct NowPlayingScreen: View {
                 SideToggle(symbol: pm.repeatMode == .One ? "repeat.1" : "repeat", on: pm.repeatMode != .Off, action: pm.cycleRepeat)
             }
             .frame(height: 84)
+            .padding(.top, 14)
             HStack {
                 PanelToggle(symbol: "slider.vertical.3", on: panel == .Mixer) { show(.Mixer) }
                 SpeedMenu()

ios/project.yml

@@ -6,8 +6,8 @@ options:
 settings:
   base:
     SWIFT_VERSION: "5.0"
-    MARKETING_VERSION: "1.0.10"
+    MARKETING_VERSION: "1.0.12"
-    CURRENT_PROJECT_VERSION: "11"
+    CURRENT_PROJECT_VERSION: "13"
 targets:
   Stemify:
     type: application
@@ -44,7 +44,7 @@ targets:
         INIntentsSupported: [INPlayMediaIntent]
         INSupportedMediaCategories: [INMediaCategoryMusic]
         UIApplicationSceneManifest:
-          UIApplicationSupportsMultipleScenes: true
+          UIApplicationSupportsMultipleScenes: false
           UISceneConfigurations:
             UIWindowSceneSessionRoleApplication:
               - UISceneConfigurationName: Phone

ios/scripts/build-ipa.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
-# Builds an unsigned build/stemify-<version>.ipa on a Mac, for re-signing with Sideloadly/AltStore.
+# Builds build/stemify-<version>.ipa on a Mac: unsigned, for re-signing with Sideloadly/AltStore.
+# With prov/Stemify.mobileprovision, prov/key.p12 and P12_PASS set, it also writes a signed
+# prov/stemify-<version>-signed.ipa (keeps CarPlay/Siri) for the owner's own device.
 # Uses swiftc directly so it works even when xcodebuild/actool need -runFirstLaunch.
 set -euo pipefail
 cd "$(dirname "$0")/.."
@@ -34,5 +36,30 @@ SRC=Stemify/Resources/Assets.xcassets/AppIcon.appiconset/icon.png
 sips -z 120 120 $SRC --out $APP/AppIcon60x60@2x.png >/dev/null
 sips -z 180 180 $SRC --out $APP/AppIcon60x60@3x.png >/dev/null
 
+# Unsigned build, for the releases and AltStore/Sideloadly.
 (cd $OUT && zip -qry stemify-$VERSION.ipa Payload)
 echo "$OUT/stemify-$VERSION.ipa"
+
+if [ -f prov/Stemify.mobileprovision ] && [ -f prov/key.p12 ] && [ -n "${P12_PASS:-}" ]; then
+  KC=$PWD/$OUT/sign.keychain-db; KP=$(uuidgen)
+  security create-keychain -p "$KP" $KC
+  security set-keychain-settings -lut 3600 $KC
+  security unlock-keychain -p "$KP" $KC
+  security import prov/key.p12 -P "$P12_PASS" -A -t agg -f pkcs12 -k $KC >/dev/null
+  # The dev cert chains to Apple's WWDR G3 intermediate, which a fresh keychain doesn't have.
+  [ -f prov/wwdr.cer ] || curl -fsSL -o prov/wwdr.cer https://www.apple.com/certificateauthority/AppleWWDRCAG3.cer
+  security import prov/wwdr.cer -A -k $KC >/dev/null 2>&1 || true
+  security set-key-partition-list -S apple-tool:,apple: -s -k "$KP" $KC >/dev/null
+  security list-keychains -d user -s $KC $(security list-keychains -d user | tr -d '"')
+  ID=$(security find-identity -v -p codesigning $KC | sed -nE 's/.*"(Apple Development:.*)"/\1/p' | head -1)
+  security cms -D -i prov/Stemify.mobileprovision > $OUT/prov.plist
+  /usr/libexec/PlistBuddy -x -c 'Print :Entitlements' $OUT/prov.plist > $OUT/ent.plist
+  cp prov/Stemify.mobileprovision $APP/embedded.mobileprovision
+  codesign -f -s "$ID" --entitlements $OUT/ent.plist --timestamp=none $APP
+  security list-keychains -d user -s $(security list-keychains -d user | tr -d "\"" | grep -v sign.keychain)
+  security delete-keychain $KC
+  # Personal build for this device only: stays in prov/ (gitignored), never released.
+  (cd $OUT && zip -qry ../prov/stemify-$VERSION-signed.ipa Payload)
+  echo "prov/stemify-$VERSION-signed.ipa (signed as $ID)"
+fi
+

ios/source.json

@@ -15,6 +15,24 @@
       "tintColor": "#FA2D48",
       "category": "entertainment",
       "versions": [
+        {
+          "version": "1.0.11",
+          "buildVersion": "12",
+          "date": "2026-10-20T12:24:42-07:00",
+          "localizedDescription": "Tapping the lock screen / Control Center player opens the app again.",
+          "downloadURL": "https://git.iamchrisama.com/cdnutter/stemify/releases/download/ios-v1.0.11/stemify-1.0.11.ipa",
+          "size": 1529241,
+          "minOSVersion": "17.0"
+        },
+        {
+          "version": "1.0.10",
+          "buildVersion": "11",
+          "date": "2026-10-20T11:21:34-07:00",
+          "localizedDescription": "Shuffle and repeat (list and song) on Now Playing. Playback speed from 0.5x to 2x, pitch kept.\n\nUnsigned IPA, not tested on device.",
+          "downloadURL": "https://git.iamchrisama.com/cdnutter/stemify/releases/download/ios-v1.0.10/stemify-1.0.10.ipa",
+          "size": 1529239,
+          "minOSVersion": "17.0"
+        },
         {
           "version": "1.0.9",
           "buildVersion": "10",

server/Dockerfile

@@ -1,8 +1,11 @@
+# Build from the repo root so the web player comes along:
+#   docker build -f server/Dockerfile -t stemserve .
 FROM python:3.12-alpine
 RUN apk add --no-cache ffmpeg
-COPY stemserve.py /app/stemserve.py
+COPY server/stemserve.py /app/server/stemserve.py
+COPY web /app/web
 ENV STEMS_DIR=/stems CACHE_DIR=/cache PORT=8765 PYTHONUNBUFFERED=1
 EXPOSE 8765
 # Unraid shares belong to nobody:users.
 USER 99:100
-CMD ["python", "/app/stemserve.py"]
+CMD ["python", "/app/server/stemserve.py"]

server/README.md

@@ -15,8 +15,9 @@ from the desktop). From an unraid terminal:
 ```sh
 mkdir -p /mnt/user/appdata/stemserve/cache /mnt/user/appdata/stemd/state/queue
 chown -R 99:100 /mnt/user/appdata/stemserve /mnt/user/appdata/stemd
-cp -r /path/to/stemify/server /mnt/user/appdata/stemserve/src   # or copy over SMB
+mkdir -p /mnt/user/appdata/stemserve/src   # needs server/ and web/ from the repo
-docker build -t stemserve /mnt/user/appdata/stemserve/src
+cp -r /path/to/stemify/{server,web} /mnt/user/appdata/stemserve/src/   # or copy over SMB
+docker build -f /mnt/user/appdata/stemserve/src/server/Dockerfile -t stemserve /mnt/user/appdata/stemserve/src
 docker run -d --name stemserve --restart unless-stopped -p 8765:8765 \
   -v /mnt/user/Music/Stems:/stems:ro \
   -v /mnt/user/appdata/stemserve/cache:/cache \
@@ -42,6 +43,9 @@ curl http://192.168.86.2:8765/api/info
 | `TOKEN`     | empty    | If set, requests need `X-Stem-Token` or `?token=`           |
 | `INDEX_TTL` | `30`     | Seconds between rescans of the stems folder                |
 | `QUEUE_DIR` | `/queue` | stemd's Stem Now folder (`stemd/state/queue` on unraid)    |
+| `PLEX_URL`  | empty    | Plex address; the web UI reaches it through `/plex/` on this server, so HTTPS pages work |
+| `PLEX_TOKEN`| empty    | Plex token for the web UI (set `TOKEN` too)                |
+| `WEB`       | `1`      | `0` turns off the web UI                                   |
 
 ## API
 

server/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   stemserve:
-    build: .
+    build: {context: .., dockerfile: server/Dockerfile}
     image: stemserve:latest
     container_name: stemserve
     restart: unless-stopped
@@ -14,3 +14,5 @@ services:
     environment:
       # Optional shared secret; set the same token in the app (Settings > Stem Server).
       - TOKEN=
+      - PLEX_URL=
+      - PLEX_TOKEN=

server/stemserve.py

@@ -16,6 +16,9 @@ Endpoints (all GET unless noted; add ?token=... or X-Stem-Token when TOKEN is se
   POST /api/prepare?key=<key>&fmt=opus&br=160 start transcodes in the background
   POST /api/stem  {"paths": [...]}           "Stem Now": stemd separates these Plex files next
   /file/<key>/<file>[?fmt=opus&br=160]       the stem itself, with Range support
+  /plex/...                                  proxy to PLEX_URL (needs TOKEN or the Plex token)
+  /api/config                                Plex URL and token from PLEX_URL / PLEX_TOKEN, if set
+  /                                           the web player (web/, or WEB_DIR); no token needed
 
 <key> is the track's folder relative to STEMS_DIR, e.g. "Artist/Album/01 Song".
 """
@@ -31,7 +34,9 @@ import subprocess
 import sys
 import threading
 import time
+import urllib.error
 import urllib.parse
+import urllib.request
 from array import array
 from concurrent.futures import ThreadPoolExecutor
 from http import HTTPStatus
@@ -43,6 +48,9 @@ PORT = int(os.environ.get("PORT", "8765"))
 TOKEN = os.environ.get("TOKEN", "")
 INDEX_TTL = float(os.environ.get("INDEX_TTL", "30"))
 QUEUE_DIR = os.environ.get("QUEUE_DIR", "/queue")  # stemd's request folder, shared with it
+PLEX_URL = os.environ.get("PLEX_URL", "").rstrip("/")
+PLEX_TOKEN = os.environ.get("PLEX_TOKEN", "")
+SERVE_WEB = os.environ.get("WEB", "1") != "0"  # WEB=0: API only, no web player
 MAX_BODY = 8 << 20
 MARKER = ".stemify.json"
 VERSION = 1
@@ -50,6 +58,10 @@ FFMPEG = shutil.which("ffmpeg")
 OPUS_RATES = (64, 96, 128, 160, 192, 256)
 PEAK_RATE = 2000  # Hz the envelope is computed at; plenty for a few hundred bars
 CHUNK = 1 << 20
+# The web player. Served without the token; it asks for one in its settings when TOKEN is set.
+WEB_DIR = os.path.realpath(os.environ.get("WEB_DIR", os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", "web")))
+WEB_TYPES = {".html": "text/html; charset=utf-8", ".js": "text/javascript; charset=utf-8", ".css": "text/css; charset=utf-8",
+             ".svg": "image/svg+xml", ".png": "image/png", ".ico": "image/x-icon", ".json": "application/json"}
 
 _pool = ThreadPoolExecutor(max_workers=max(2, (os.cpu_count() or 2) // 2))
 _locks: dict[str, threading.Lock] = {}
@@ -254,6 +266,31 @@ class Handler(BaseHTTPRequestHandler):
             return True
         return TOKEN in (self.headers.get("X-Stem-Token"), query.get("token", [None])[0])
 
+    def _plex_proxy(self, path, rawquery, query):
+        """Forward to PLEX_URL so an HTTPS page can reach an HTTP Plex. Needs the stem or Plex token."""
+        given = self.headers.get("X-Plex-Token") or query.get("X-Plex-Token", [None])[0]
+        if not (self._authorized(query) or (PLEX_TOKEN and given == PLEX_TOKEN)):
+            return self._error(HTTPStatus.UNAUTHORIZED, "bad token")
+        pairs = [(k, v) for k, v in urllib.parse.parse_qsl(rawquery, keep_blank_values=True) if k not in ("token", "X-Plex-Token")]
+        req = urllib.request.Request(PLEX_URL + path + ("?" + urllib.parse.urlencode(pairs) if pairs else ""))
+        req.add_header("X-Plex-Token", PLEX_TOKEN or given or "")
+        for h in ("Range", "Accept", "X-Plex-Client-Identifier", "X-Plex-Product", "If-None-Match"):
+            if self.headers.get(h):
+                req.add_header(h, self.headers[h])
+        try:
+            r = urllib.request.urlopen(req, timeout=30)
+        except urllib.error.HTTPError as e:
+            r = e
+        except OSError as e:
+            return self._error(502, f"plex unreachable: {e}")
+        self.send_response(r.status if hasattr(r, "status") else r.code)
+        for h in ("Content-Type", "Content-Length", "Content-Range", "Accept-Ranges", "ETag", "Cache-Control"):
+            if r.headers.get(h):
+                self.send_header(h, r.headers[h])
+        self.end_headers()
+        while chunk := r.read(65536):
+            self.wfile.write(chunk)
+
     def _send(self, status, body=b"", ctype="application/json", headers=None):
         self.send_response(status)
         self.send_header("Content-Type", ctype)
@@ -267,6 +304,19 @@ class Handler(BaseHTTPRequestHandler):
     def _error(self, status, msg):
         self._send(status, json.dumps({"error": msg}).encode())
 
+    def _web(self, path):
+        if not SERVE_WEB:
+            return self._error(404, "not found")
+        if path == "/":
+            path = "/index.html"
+        full = os.path.realpath(os.path.join(WEB_DIR, path.lstrip("/")))
+        if not full.startswith(WEB_DIR + os.sep) or not os.path.isfile(full):
+            return self._error(404, "not found")
+        with open(full, "rb") as f:
+            body = f.read()
+        ctype = WEB_TYPES.get(os.path.splitext(full)[1], "application/octet-stream")
+        self._send(200, body, ctype, {"Cache-Control": "no-cache"})
+
     def do_HEAD(self):
         self.do_GET()
 
@@ -277,6 +327,10 @@ class Handler(BaseHTTPRequestHandler):
         url = urllib.parse.urlsplit(self.path)
         query = urllib.parse.parse_qs(url.query)
         path = urllib.parse.unquote(url.path)
+        if path.startswith("/plex/") and PLEX_URL:
+            return self._plex_proxy(path[len("/plex"):], url.query, query)
+        if not path.startswith(("/api/", "/file/")):
+            return self._web(path)
         if not self._authorized(query):
             return self._error(HTTPStatus.UNAUTHORIZED, "bad token")
         try:
@@ -286,6 +340,9 @@ class Handler(BaseHTTPRequestHandler):
                     "name": "stemserve", "version": VERSION, "tracks": INDEX.count,
                     "ffmpeg": bool(FFMPEG), "opus": list(OPUS_RATES) if FFMPEG else [],
                     "stemNow": os.access(QUEUE_DIR, os.W_OK)}).encode())
+            if path == "/api/config":
+                plex = {"url": PLEX_URL, "token": PLEX_TOKEN} if PLEX_URL and PLEX_TOKEN else None
+                return self._send(200, json.dumps({"plex": plex}).encode(), headers={"Cache-Control": "no-store"})
             if path == "/api/index":
                 body, etag = INDEX.get()
                 if self.headers.get("If-None-Match") == etag:

web/app.js

@@ -0,0 +1,874 @@
+// Stemify web player. Browses Plex, plays stems from stemserve, no build step.
+// Each stem is its own <audio> element so speed changes keep pitch; a tick keeps them lined up.
+
+const $ = (s, r = document) => r.querySelector(s);
+const esc = s => String(s ?? "").replace(/[&<>"']/g, c => ({ "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" })[c]);
+const fmtTime = s => { s = Math.max(0, Math.floor(s || 0)); return `${Math.floor(s / 60)}:${String(s % 60).padStart(2, "0")}`; };
+const shuffled = a => { a = a.slice(); for (let i = a.length - 1; i > 0; i--) { const j = Math.floor(Math.random() * (i + 1)); [a[i], a[j]] = [a[j], a[i]]; } return a; };
+
+const ICON = {
+  play: '<svg viewBox="0 0 24 24"><path d="M7 4.5v15a1 1 0 0 0 1.5.86l12.5-7.5a1 1 0 0 0 0-1.72L8.5 3.64A1 1 0 0 0 7 4.5z"/></svg>',
+  pause: '<svg viewBox="0 0 24 24"><rect x="5.5" y="4" width="4.5" height="16" rx="1.2"/><rect x="14" y="4" width="4.5" height="16" rx="1.2"/></svg>',
+  prev: '<svg viewBox="0 0 24 24"><rect x="4" y="5" width="2.5" height="14" rx="1"/><path d="M20 5.7v12.6a1 1 0 0 1-1.55.83L9 12.83a1 1 0 0 1 0-1.66l9.45-6.3A1 1 0 0 1 20 5.7z"/></svg>',
+  next: '<svg viewBox="0 0 24 24"><rect x="17.5" y="5" width="2.5" height="14" rx="1"/><path d="M4 5.7v12.6a1 1 0 0 0 1.55.83L15 12.83a1 1 0 0 0 0-1.66l-9.45-6.3A1 1 0 0 0 4 5.7z"/></svg>',
+  shuffle: '<svg viewBox="0 0 24 24"><path d="M17 3l4 4-4 4V8h-2.2c-1 0-1.9.5-2.5 1.3L7.6 16c-.9 1.3-2.4 2-4 2H2v-2h1.6c.9 0 1.8-.5 2.3-1.2l4.7-6.7C11.5 6.8 13 6 14.8 6H17V3zM2 6h1.6c1.6 0 3.1.8 4 2l.9 1.3-1.2 1.7-1.4-1.9A2.8 2.8 0 0 0 3.6 8H2V6zm12.3 9.7c.6.8 1.5 1.3 2.5 1.3H17v-3l4 4-4 4v-3h-.2c-1.7 0-3.3-.8-4.2-2.2l-.6-.8 1.2-1.7.1.4z"/></svg>',
+  repeat: '<svg viewBox="0 0 24 24"><path d="M17 1l4 4-4 4V6H7a2 2 0 0 0-2 2v3H3V8a4 4 0 0 1 4-4h10V1zM7 23l-4-4 4-4v3h10a2 2 0 0 0 2-2v-3h2v3a4 4 0 0 1-4 4H7v3z"/></svg>',
+  repeat1: '<svg viewBox="0 0 24 24"><path d="M17 1l4 4-4 4V6H7a2 2 0 0 0-2 2v3H3V8a4 4 0 0 1 4-4h10V1zM7 23l-4-4 4-4v3h10a2 2 0 0 0 2-2v-3h2v3a4 4 0 0 1-4 4H7v3z"/><path d="M11.2 9.6l1.8-.9h1.2v6.6h-1.6v-4.9l-1.4.6z"/></svg>',
+  mixer: '<svg viewBox="0 0 24 24"><path d="M6 3h2v6.2a3 3 0 0 1 0 5.6V21H6v-6.2a3 3 0 0 1 0-5.6V3zm10 0h2v2.2a3 3 0 0 1 0 5.6V21h-2V10.8a3 3 0 0 1 0-5.6V3zM7 11a1 1 0 1 0 0 2 1 1 0 0 0 0-2zm10-4a1 1 0 1 0 0 2 1 1 0 0 0 0-2z"/></svg>',
+  queue: '<svg viewBox="0 0 24 24"><path d="M3 5h14v2H3zm0 6h14v2H3zm0 6h9v2H3zm13-1.5v-1.5l6 3.5-6 3.5V17z"/></svg>',
+  busy: '<svg viewBox="0 0 24 24"><path d="M12 3a9 9 0 1 0 9 9h-2.2A6.8 6.8 0 1 1 12 5.2V3z"/></svg>',
+};
+
+// ---- settings --------------------------------------------------------------------------
+
+const KEY = "stemify-web";
+const S = Object.assign({
+  plex: null,           // {url, token, name}
+  section: null,
+  stemUrl: "",          // empty = same origin as this page
+  stemToken: "",
+  fmt: "opus160",
+  volume: 0.85, speed: 1, shuffle: false, repeat: "off",
+  mix: {},              // stem name -> {level, muted, solo}; kept across tracks
+  albumSort: "titleSort",
+}, load(KEY) || {});
+if (!S.clientId) S.clientId = crypto.randomUUID ? crypto.randomUUID() : String(Math.random()).slice(2);
+if (S.fmt.startsWith("opus") && !new Audio().canPlayType('audio/ogg; codecs="opus"')) S.fmt = "flac";
+
+function load(k) { try { return JSON.parse(localStorage.getItem(k)); } catch { return null; } }
+let saveTimer;
+function save() {
+  clearTimeout(saveTimer);
+  saveTimer = setTimeout(() => {
+    try {
+      localStorage.setItem(KEY, JSON.stringify(S));
+      localStorage.setItem(KEY + "-queue", JSON.stringify({ items: Q.items.slice(0, 2000), orig: Q.orig?.slice(0, 2000), i: Q.i, pos: E.position() }));
+    } catch {}
+  }, 300);
+}
+
+const SPEEDS = [0.5, 0.75, 0.9, 1, 1.1, 1.25, 1.5, 2];
+
+// ---- Plex ------------------------------------------------------------------------------
+
+const plexHeaders = token => ({
+  Accept: "application/json",
+  "X-Plex-Product": "Stemify Web",
+  "X-Plex-Client-Identifier": S.clientId,
+  ...(token ? { "X-Plex-Token": token } : {}),
+});
+
+async function px(path, params = {}) {
+  if (!S.plex) throw new Error("Not signed in to Plex");
+  const u = new URL(S.plex.url + path, location.href);
+  for (const [k, v] of Object.entries(params)) u.searchParams.set(k, v);
+  const r = await fetch(u, { headers: plexHeaders(S.plex.token) });
+  if (!r.ok) throw new Error(`Plex ${r.status}`);
+  return (await r.json()).MediaContainer || {};
+}
+
+const plexImg = (thumb, size = 300) => thumb && S.plex
+  ? `${S.plex.url}/photo/:/transcode?width=${size}&height=${size}&minSize=1&upscale=1&url=${encodeURIComponent(thumb)}&X-Plex-Token=${S.plex.token}`
+  : "";
+
+function plexTrack(m) {
+  const part = m.Media?.[0]?.Part?.[0];
+  return {
+    id: "p" + m.ratingKey, title: m.title, artist: m.originalTitle || m.grandparentTitle || "", album: m.parentTitle || "",
+    albumKey: m.parentRatingKey, thumb: m.thumb || m.parentThumb || m.grandparentThumb, duration: m.duration || part?.duration || 0,
+    part: part?.key, file: part?.file, index: m.index,
+  };
+}
+
+async function plexSignIn(status) {
+  const pin = await (await fetch("https://plex.tv/api/v2/pins?strong=true", { method: "POST", headers: plexHeaders() })).json();
+  const auth = `https://app.plex.tv/auth#?clientID=${encodeURIComponent(S.clientId)}&code=${encodeURIComponent(pin.code)}&context%5Bdevice%5D%5Bproduct%5D=Stemify%20Web`;
+  window.open(auth, "_blank", "width=800,height=740");
+  status("Waiting for Plex sign-in…");
+  let token = null;
+  for (let n = 0; n < 150 && !token; n++) {
+    await new Promise(r => setTimeout(r, 2000));
+    token = (await (await fetch(`https://plex.tv/api/v2/pins/${pin.id}`, { headers: plexHeaders() })).json()).authToken;
+  }
+  if (!token) throw new Error("Sign-in timed out");
+  status("Finding your server…");
+  const res = await (await fetch("https://plex.tv/api/v2/resources?includeHttps=1", { headers: plexHeaders(token) })).json();
+  const https = location.protocol === "https:";
+  for (const srv of res.filter(r => r.provides?.includes("server"))) {
+    const conns = (srv.connections || []).filter(c => !https || c.protocol === "https")
+      .sort((a, b) => (b.local - a.local) || (a.relay - b.relay));
+    for (const c of conns) {
+      try {
+        const r = await fetch(`${c.uri}/identity`, { headers: plexHeaders(srv.accessToken || token), signal: AbortSignal.timeout(3500) });
+        if (r.ok) return { url: c.uri, token: srv.accessToken || token, name: srv.name };
+      } catch {}
+    }
+  }
+  throw new Error("Signed in, but no Plex server answered from this browser");
+}
+
+async function musicSection() {
+  if (S.section) return S.section;
+  const secs = (await px("/library/sections")).Directory || [];
+  S.section = secs.find(d => d.type === "artist")?.key || null;
+  save();
+  if (!S.section) throw new Error("No music library on this Plex server");
+  return S.section;
+}
+
+// ---- stemserve -------------------------------------------------------------------------
+
+const stemBase = () => (S.stemUrl || location.origin).replace(/\/+$/, "");
+const stemQuery = extra => {
+  const q = new URLSearchParams(extra);
+  if (S.stemToken) q.set("token", S.stemToken);
+  const s = q.toString();
+  return s ? "?" + s : "";
+};
+const keyPath = k => k.split("/").map(encodeURIComponent).join("/");
+const fmtParams = () => S.fmt.startsWith("opus") ? { fmt: "opus", br: S.fmt.slice(4) } : {};
+
+// Same matching as the apps: the stems folder mirrors the music folder, so the Plex path's
+// suffix identifies a track. Short or duration-mismatched suffixes only count under a root
+// learned from an earlier confident match.
+const Stems = {
+  entries: [], bySource: new Map(), roots: [], etag: null, ok: false,
+  norm(p) {
+    p = p.normalize("NFC").replaceAll("\\", "/");
+    const slash = p.lastIndexOf("/"), dot = p.lastIndexOf(".");
+    if (dot > slash + 1) p = p.slice(0, dot);
+    return p.toLowerCase();
+  },
+  async refresh() {
+    try {
+      const r = await fetch(stemBase() + "/api/index" + stemQuery(), { headers: this.etag ? { "If-None-Match": this.etag } : {} });
+      this.ok = r.ok || r.status === 304;
+      if (r.status !== 200) return false;
+      this.etag = r.headers.get("ETag");
+      this.entries = (await r.json()).tracks || [];
+      this.bySource = new Map();
+      for (const e of this.entries) { const k = this.norm(e.source); if (!this.bySource.has(k)) this.bySource.set(k, e); }
+      return true;
+    } catch { this.ok = false; return false; }
+  },
+  find(t) {
+    if (t.stem) return t.stem;
+    if (!t.file || !this.entries.length) return null;
+    const path = this.norm(t.file);
+    for (const root of this.roots) if (path.startsWith(root)) { const hit = this.bySource.get(path.slice(root.length)); if (hit) return hit; }
+    const parts = path.split("/");
+    for (let i = 1; i < parts.length; i++) {
+      const hit = this.bySource.get(parts.slice(i).join("/"));
+      if (!hit) continue;
+      const okDur = !hit.duration || !t.duration || Math.abs(hit.duration * 1000 - t.duration) < 3000;
+      if (parts.length - i >= 2 && okDur) {
+        const root = parts.slice(0, i).join("/") + "/";
+        if (!this.roots.includes(root)) this.roots.push(root);
+        return hit;
+      }
+    }
+    return null;
+  },
+  url(e, s) { return `${stemBase()}/file/${keyPath(e.key)}/${encodeURIComponent(s.file)}${stemQuery(fmtParams())}`; },
+  prepare(e) {
+    if (e && S.fmt.startsWith("opus")) fetch(`${stemBase()}/api/prepare${stemQuery({ key: e.key, ...fmtParams() })}`, { method: "POST" }).catch(() => {});
+  },
+};
+
+const stemTrack = e => {
+  const parts = e.key.split("/");
+  return { id: "s" + e.key, title: parts.at(-1), artist: parts.at(-3) || "", album: parts.at(-2) || "", duration: (e.duration || 0) * 1000, stem: e };
+};
+
+// ---- mix -------------------------------------------------------------------------------
+
+const unity = () => ({ level: 1, muted: false, solo: false });
+const PRESETS = [
+  ["Full Mix", () => ({})],
+  ["Karaoke", n => n.includes("vocals") && { vocals: { muted: true } }],
+  ["A Cappella", n => n.includes("vocals") && { vocals: { solo: true } }],
+  ["No Drums", n => n.includes("drums") && { drums: { muted: true } }],
+  ["Rhythm", n => n.includes("drums") && n.includes("bass") && { drums: { solo: true }, bass: { solo: true } }],
+  ["No Guitar", n => n.includes("guitar") && { guitar: { muted: true } }],
+  ["No Bass", n => n.includes("bass") && { bass: { muted: true } }],
+];
+const setting = name => ({ ...unity(), ...S.mix[name] });
+function stemGain(name, names) {
+  const s = setting(name), anySolo = names.some(n => setting(n).solo);
+  return anySolo ? (s.solo ? s.level : 0) : (s.muted ? 0 : s.level);
+}
+function applyPreset(build, names) {
+  const m = build(names);
+  if (!m) return;
+  S.mix = {};
+  for (const [k, v] of Object.entries(m)) S.mix[k] = { ...unity(), ...v };
+  mixChanged();
+}
+function currentPreset(names) {
+  const norm = m => JSON.stringify(names.map(n => { const s = { ...unity(), ...m[n] }; return [s.level, s.muted, s.solo]; }));
+  const now = norm(S.mix);
+  return PRESETS.find(([, b]) => { const m = b(names); return m && norm(Object.fromEntries(Object.entries(m).map(([k, v]) => [k, { ...unity(), ...v }]))) === now; })?.[0];
+}
+
+// ---- audio -----------------------------------------------------------------------------
+
+const E = {
+  els: [], names: [], gains: [], ctx: null, master: null, graph: false,
+  want: false, stalled: false, onEnded: null,
+
+  audioCtx() {
+    if (!this.ctx) {
+      const C = window.AudioContext || window.webkitAudioContext;
+      if (!C) return null;
+      this.ctx = new C();
+      this.master = this.ctx.createGain();
+      this.master.connect(this.ctx.destination);
+      this.master.gain.value = S.volume;
+    }
+    if (this.ctx.state === "suspended") this.ctx.resume();
+    return this.ctx;
+  },
+
+  load(sources, startSec, play) {
+    this.unload();
+    // Web Audio gains work everywhere (iOS ignores element volume) but need same-origin media.
+    const sameOrigin = sources.every(s => new URL(s.url, location.href).origin === location.origin);
+    this.graph = sameOrigin && !!this.audioCtx();
+    for (const s of sources) {
+      const el = new Audio();
+      el.preload = "auto";
+      el.preservesPitch = true;
+      el.src = s.url;
+      el.playbackRate = el.defaultPlaybackRate = S.speed;
+      if (startSec) el.currentTime = startSec;
+      let gain = null;
+      if (this.graph) {
+        gain = this.ctx.createGain();
+        this.ctx.createMediaElementSource(el).connect(gain).connect(this.master);
+      }
+      this.els.push(el); this.gains.push(gain); this.names.push(s.name);
+    }
+    const lead = this.els[0];
+    lead.addEventListener("ended", () => this.onEnded?.());
+    lead.addEventListener("durationchange", () => UI.progress());
+    lead.addEventListener("error", () => { if (this.want) toast("Couldn't load this track"); });
+    this.applyGains();
+    this.want = play;
+    this.stalled = play;
+  },
+
+  unload() {
+    for (const el of this.els) { el.pause(); el.removeAttribute("src"); el.load(); }
+    this.els = []; this.names = []; this.gains = [];
+  },
+
+  applyGains() {
+    const named = this.names.filter(Boolean);
+    this.els.forEach((el, i) => {
+      const g = this.names[i] ? stemGain(this.names[i], named) : 1;
+      if (this.gains[i]) this.gains[i].gain.value = g;
+      else el.volume = Math.min(1, g * (this.graph ? 1 : S.volume));
+    });
+    if (this.master) this.master.gain.value = S.volume;
+  },
+
+  play() { this.audioCtx(); this.want = true; this.stalled = true; this.tick(); },
+  pause() { this.want = false; this.stalled = false; this.els.forEach(e => e.pause()); },
+  seek(sec) { this.els.forEach(e => { e.currentTime = sec; }); if (this.want) this.stalled = true; UI.progress(); },
+  setSpeed(v) { this.els.forEach(e => { e.playbackRate = e.defaultPlaybackRate = v; }); },
+  position() { return this.els[0]?.currentTime || 0; },
+  duration() { const d = this.els[0]?.duration; return isFinite(d) ? d : (Q.cur()?.duration || 0) / 1000; },
+  get playing() { return this.want; },
+  get buffering() { return this.want && this.stalled; },
+
+  // Holds everything until every stem can play, then starts them together and keeps followers
+  // within ~15 ms of the lead by nudging their rate (pitch is preserved, so it's inaudible).
+  tick() {
+    if (!this.els.length || !this.want) return;
+    const lead = this.els[0];
+    const notReady = this.els.some(e => e.readyState < 3 && !e.ended);
+    if (notReady) {
+      if (!this.stalled) { this.els.forEach(e => e.pause()); this.stalled = true; UI.transport(); }
+      return;
+    }
+    if (this.stalled) {
+      this.stalled = false;
+      const t = lead.currentTime;
+      this.els.forEach(e => { if (e !== lead && Math.abs(e.currentTime - t) > 0.01) e.currentTime = t; e.playbackRate = S.speed; });
+      Promise.all(this.els.map(e => e.play())).catch(err => {
+        if (err.name === "NotAllowedError") { this.pause(); UI.transport(); }
+      });
+      UI.transport();
+      return;
+    }
+    for (const f of this.els.slice(1)) {
+      if (f.ended || lead.ended) continue;
+      const d = f.currentTime - lead.currentTime;
+      if (Math.abs(d) > 0.25) f.currentTime = lead.currentTime;
+      else if (Math.abs(d) > 0.015) f.playbackRate = S.speed * (1 - Math.max(-0.06, Math.min(0.06, d * 1.5)));
+      else if (f.playbackRate !== S.speed) f.playbackRate = S.speed;
+    }
+  },
+};
+setInterval(() => E.tick(), 150);
+
+// ---- queue -----------------------------------------------------------------------------
+
+let uidSeq = Date.now();
+const wrap = t => ({ uid: uidSeq++, t });
+const Q = {
+  items: [], orig: null, i: -1,
+  cur() { return this.items[this.i]?.t; },
+
+  playList(tracks, start = 0, shuffle = S.shuffle) {
+    if (!tracks.length) return;
+    const all = tracks.map(wrap);
+    if (shuffle) {
+      const first = all[start] && start >= 0 ? all[start] : all[Math.floor(Math.random() * all.length)];
+      this.orig = all;
+      this.items = [first, ...shuffled(all.filter(x => x !== first))];
+      this.i = 0;
+    } else { this.orig = null; this.items = all; this.i = start; }
+    S.shuffle = shuffle;
+    this.start(0, true);
+  },
+  add(tracks, next = false) {
+    const w = tracks.map(wrap);
+    if (next) { this.items.splice(this.i + 1, 0, ...w); this.orig?.push(...w); }
+    else { this.items.push(...w); this.orig?.push(...w); }
+    if (this.i < 0) { this.i = 0; this.start(0, false); }
+    UI.drawer(); save();
+    toast(tracks.length === 1 ? `Added “${tracks[0].title}”` : `Added ${tracks.length} tracks`);
+  },
+  remove(idx) {
+    if (idx === this.i) return;
+    const [x] = this.items.splice(idx, 1);
+    if (this.orig) this.orig = this.orig.filter(o => o !== x);
+    if (idx < this.i) this.i--;
+    UI.drawer(); save();
+  },
+  jump(idx) { this.i = idx; this.start(0, true); },
+
+  start(posSec, play) {
+    const t = this.cur();
+    if (!t) { E.unload(); UI.all(); return; }
+    const e = Stems.find(t);
+    const srcs = e
+      ? e.stems.map(s => ({ name: s.name, url: Stems.url(e, s) }))
+      : [{ name: null, url: `${S.plex?.url}${t.part}?X-Plex-Token=${S.plex?.token}` }];
+    E.load(srcs, posSec, play);
+    Wave.load(e);
+    Stems.prepare(e);
+    const nt = this.items[this.i + 1]?.t;
+    if (nt) Stems.prepare(Stems.find(nt));
+    UI.all(); save();
+  },
+
+  next(auto = false) {
+    if (auto && S.repeat === "one") { E.seek(0); E.play(); return; }
+    if (this.i + 1 < this.items.length) { this.i++; this.start(0, true); }
+    else if (S.repeat !== "off" && this.items.length) { this.i = 0; this.start(0, true); }
+    else if (auto) { E.pause(); E.seek(0); UI.transport(); }
+  },
+  prev() {
+    if (E.position() > 3 || (this.i === 0 && S.repeat === "off")) { E.seek(0); return; }
+    this.i = this.i > 0 ? this.i - 1 : this.items.length - 1;
+    this.start(0, E.playing);
+  },
+
+  toggleShuffle() {
+    if (!S.shuffle) {
+      this.orig = this.items.slice();
+      this.items = [...this.items.slice(0, this.i + 1), ...shuffled(this.items.slice(this.i + 1))];
+    } else if (this.orig) {
+      const cur = this.items[this.i];
+      this.items = this.orig;
+      this.i = Math.max(0, this.items.indexOf(cur));
+      this.orig = null;
+    }
+    S.shuffle = !S.shuffle;
+    UI.transport(); UI.drawer(); save();
+  },
+  cycleRepeat() {
+    S.repeat = { off: "all", all: "one", one: "off" }[S.repeat];
+    UI.transport(); save();
+  },
+};
+E.onEnded = () => Q.next(true);
+
+function setSpeed(v) {
+  S.speed = v;
+  E.setSpeed(v);
+  UI.transport(); save();
+}
+function mixChanged() { E.applyGains(); Wave.draw(); UI.drawer(); save(); }
+
+// ---- waveform --------------------------------------------------------------------------
+
+const Wave = {
+  peaks: null, key: null, canvas: $("#wave"),
+  async load(e) {
+    this.peaks = null; this.key = e?.key || null;
+    this.draw();
+    if (!e) return;
+    try {
+      const r = await fetch(`${stemBase()}/api/peaks${stemQuery({ key: e.key, n: 300 })}`);
+      if (!r.ok || this.key !== e.key) return;
+      this.peaks = (await r.json()).stems;
+      this.draw();
+    } catch {}
+  },
+  draw() {
+    const c = this.canvas, dpr = devicePixelRatio || 1;
+    const w = c.clientWidth, h = c.clientHeight;
+    if (!w) return;
+    if (c.width !== w * dpr) { c.width = w * dpr; c.height = h * dpr; }
+    const x = c.getContext("2d");
+    x.setTransform(dpr, 0, 0, dpr, 0, 0);
+    x.clearRect(0, 0, w, h);
+    const dur = E.duration(), frac = dur ? Math.min(1, E.position() / dur) : 0;
+    const accent = getComputedStyle(document.documentElement).getPropertyValue("--accent");
+    if (!this.peaks) {
+      x.fillStyle = "#ffffff22"; x.fillRect(0, h / 2 - 2, w, 4);
+      x.fillStyle = accent; x.fillRect(0, h / 2 - 2, w * frac, 4);
+      return;
+    }
+    const names = Object.keys(this.peaks), n = this.peaks[names[0]].length;
+    const full = new Float32Array(n), mixed = new Float32Array(n);
+    for (const nm of names) {
+      const g = stemGain(nm, names);
+      this.peaks[nm].forEach((p, i) => { const v = p / 1000; full[i] += v * v; mixed[i] += v * v * g * g; });
+    }
+    const max = Math.sqrt(Math.max(...full)) || 1;
+    const bars = Math.max(20, Math.floor(w / 3)), bw = w / bars;
+    for (let b = 0; b < bars; b++) {
+      const i = Math.floor(b / bars * n);
+      const v = Math.sqrt(mixed[i]) / max, ghost = Math.sqrt(full[i]) / max;
+      const cx = b * bw;
+      x.fillStyle = "#ffffff12";
+      const gh = Math.max(2, ghost * h);
+      x.fillRect(cx, (h - gh) / 2, bw - 1, gh);
+      x.fillStyle = b / bars < frac ? accent : "#ffffff40";
+      const bh = Math.max(2, v * h);
+      x.fillRect(cx, (h - bh) / 2, bw - 1, bh);
+    }
+  },
+};
+{
+  let drag = false;
+  const at = ev => { const r = Wave.canvas.getBoundingClientRect(); return Math.max(0, Math.min(1, (ev.clientX - r.left) / r.width)) * E.duration(); };
+  Wave.canvas.addEventListener("pointerdown", ev => { drag = true; Wave.canvas.setPointerCapture(ev.pointerId); E.seek(at(ev)); });
+  Wave.canvas.addEventListener("pointermove", ev => { if (drag) E.seek(at(ev)); });
+  Wave.canvas.addEventListener("pointerup", () => { drag = false; save(); });
+  new ResizeObserver(() => Wave.draw()).observe(Wave.canvas);
+}
+
+// ---- player UI -------------------------------------------------------------------------
+
+let drawerMode = null; // "mixer" | "queue"
+
+const UI = {
+  all() { this.track(); this.transport(); this.progress(); this.drawer(); markPlaying(); },
+  track() {
+    const t = Q.cur();
+    $("#player").classList.toggle("empty", !t);
+    $("#np-title").textContent = t?.title || "Nothing playing";
+    $("#np-sub").textContent = t ? [t.artist, t.album].filter(Boolean).join(" · ") : "";
+    const art = t ? plexImg(t.thumb, 120) : "";
+    if (art) $("#np-art").src = art; else $("#np-art").removeAttribute("src");
+    document.title = t ? `${t.title} · Stemify` : "Stemify";
+    if ("mediaSession" in navigator) {
+      navigator.mediaSession.metadata = t ? new MediaMetadata({
+        title: t.title, artist: t.artist, album: t.album,
+        artwork: t.thumb ? [{ src: plexImg(t.thumb, 512), sizes: "512x512" }] : [],
+      }) : null;
+    }
+  },
+  transport() {
+    const p = $("#b-play");
+    p.innerHTML = E.buffering ? ICON.busy : E.playing ? ICON.pause : ICON.play;
+    p.classList.toggle("busy", E.buffering);
+    $("#b-shuffle").classList.toggle("on", S.shuffle);
+    $("#b-repeat").innerHTML = S.repeat === "one" ? ICON.repeat1 : ICON.repeat;
+    $("#b-repeat").classList.toggle("on", S.repeat !== "off");
+    $("#b-repeat").title = `Repeat: ${S.repeat} (R)`;
+    $("#speed").value = String(S.speed);
+    $("#speed").classList.toggle("on", S.speed !== 1);
+    $("#b-mixer").classList.toggle("on", drawerMode === "mixer");
+    $("#b-queue").classList.toggle("on", drawerMode === "queue");
+    if ("mediaSession" in navigator) navigator.mediaSession.playbackState = E.playing ? "playing" : "paused";
+  },
+  progress() {
+    $("#t-pos").textContent = fmtTime(E.position());
+    $("#t-dur").textContent = fmtTime(E.duration());
+    Wave.draw();
+    const d = E.duration();
+    if (d && navigator.mediaSession?.setPositionState) {
+      try { navigator.mediaSession.setPositionState({ duration: d, position: Math.min(d, E.position()), playbackRate: S.speed }); } catch {}
+    }
+  },
+  drawer() {
+    const d = $("#drawer");
+    d.hidden = !drawerMode;
+    if (drawerMode === "mixer") d.innerHTML = mixerHtml();
+    else if (drawerMode === "queue") d.innerHTML = queueHtml();
+    this.transport();
+  },
+};
+
+function mixerHtml() {
+  const names = E.names.filter(Boolean);
+  if (!names.length) return `<h2>Mixer</h2><p class="note">${Q.cur() ? "This track has no stems yet." : "Play something with stems to mix it."}</p>`;
+  const cur = currentPreset(names);
+  return `<h2>Mixer</h2>
+    <div class="presets">${PRESETS.map(([label, b], i) => `<button class="chip ${cur === label ? "on" : ""}" data-preset="${i}" ${b(names) ? "" : "disabled"}>${label}</button>`).join("")}</div>
+    ${names.map(n => {
+      const s = setting(n), g = stemGain(n, names);
+      return `<div class="stem ${g ? "" : "silent"}"><span class="name">${esc(n)}</span>
+        <button class="ms ${s.muted ? "on" : ""}" data-mute="${esc(n)}" title="Mute">M</button>
+        <button class="ms solo ${s.solo ? "on" : ""}" data-solo="${esc(n)}" title="Solo">S</button>
+        <input type="range" min="0" max="1" step="0.01" value="${s.level}" data-level="${esc(n)}"></div>`;
+    }).join("")}
+    <p class="note">The mix carries over to the next track.</p>`;
+}
+
+function queueHtml() {
+  if (!Q.items.length) return `<h2>Queue</h2><p class="note">Empty.</p>`;
+  return `<h2>Queue</h2>${Q.items.map((x, i) => `
+    <div class="q-item ${i === Q.i ? "cur" : i < Q.i ? "past" : ""}" data-q="${i}">
+      <img loading="lazy" ${x.t.thumb ? `src="${esc(plexImg(x.t.thumb, 80))}"` : ""} alt="">
+      <div class="tx"><div>${esc(x.t.title)}</div><div>${esc(x.t.artist)}</div></div>
+      ${i === Q.i ? "" : `<button class="x" data-qx="${i}" title="Remove">×</button>`}
+    </div>`).join("")}`;
+}
+
+$("#drawer").addEventListener("click", ev => {
+  const b = ev.target.closest("button, .q-item");
+  if (!b) return;
+  const names = E.names.filter(Boolean);
+  if (b.dataset.preset) applyPreset(PRESETS[+b.dataset.preset][1], names);
+  else if (b.dataset.mute) { const n = b.dataset.mute; S.mix[n] = { ...setting(n), muted: !setting(n).muted }; mixChanged(); }
+  else if (b.dataset.solo) { const n = b.dataset.solo; S.mix[n] = { ...setting(n), solo: !setting(n).solo }; mixChanged(); }
+  else if (b.dataset.qx) Q.remove(+b.dataset.qx);
+  else if (b.dataset.q) Q.jump(+b.dataset.q);
+});
+$("#drawer").addEventListener("input", ev => {
+  const n = ev.target.dataset.level;
+  if (!n) return;
+  S.mix[n] = { ...setting(n), level: +ev.target.value };
+  E.applyGains(); Wave.draw(); save();
+});
+$("#drawer").addEventListener("change", ev => { if (ev.target.dataset.level) UI.drawer(); });
+
+$("#b-play").innerHTML = ICON.play;
+$("#b-prev").innerHTML = ICON.prev;
+$("#b-next").innerHTML = ICON.next;
+$("#b-shuffle").innerHTML = ICON.shuffle;
+$("#b-mixer").innerHTML = ICON.mixer;
+$("#b-queue").innerHTML = ICON.queue;
+$("#speed").innerHTML = SPEEDS.map(v => `<option value="${v}">${v}×</option>`).join("");
+$("#volume").value = S.volume;
+
+const togglePlay = () => { if (!Q.cur()) return; E.playing ? E.pause() : E.play(); UI.transport(); save(); };
+const toggleDrawer = m => { drawerMode = drawerMode === m ? null : m; UI.drawer(); };
+$("#b-play").onclick = togglePlay;
+$("#b-prev").onclick = () => Q.prev();
+$("#b-next").onclick = () => Q.next();
+$("#b-shuffle").onclick = () => Q.toggleShuffle();
+$("#b-repeat").onclick = () => Q.cycleRepeat();
+$("#b-mixer").onclick = () => toggleDrawer("mixer");
+$("#b-queue").onclick = () => toggleDrawer("queue");
+$("#speed").onchange = ev => setSpeed(+ev.target.value);
+$("#volume").oninput = ev => { S.volume = +ev.target.value; E.applyGains(); save(); };
+
+if ("mediaSession" in navigator) {
+  const ms = navigator.mediaSession;
+  ms.setActionHandler("play", () => { E.play(); UI.transport(); });
+  ms.setActionHandler("pause", () => { E.pause(); UI.transport(); });
+  ms.setActionHandler("previoustrack", () => Q.prev());
+  ms.setActionHandler("nexttrack", () => Q.next());
+  try { ms.setActionHandler("seekto", d => E.seek(d.seekTime)); } catch {}
+}
+
+document.addEventListener("keydown", ev => {
+  if (ev.target.closest("input, select, textarea") || ev.metaKey || ev.ctrlKey || ev.altKey) return;
+  const k = ev.key.toLowerCase();
+  if (k === " ") { ev.preventDefault(); togglePlay(); }
+  else if (k === "arrowright") E.seek(Math.min(E.duration(), E.position() + (ev.shiftKey ? 30 : 5)));
+  else if (k === "arrowleft") E.seek(Math.max(0, E.position() - (ev.shiftKey ? 30 : 5)));
+  else if (k === "s") Q.toggleShuffle();
+  else if (k === "r") Q.cycleRepeat();
+  else if (k === "m") toggleDrawer("mixer");
+  else if (k === "q") toggleDrawer("queue");
+  else if (k === "]" || k === "[") { const i = SPEEDS.indexOf(S.speed) + (k === "]" ? 1 : -1); if (SPEEDS[i]) setSpeed(SPEEDS[i]); }
+});
+
+(function frame() {
+  if (E.playing) {
+    $("#t-pos").textContent = fmtTime(E.position());
+    Wave.draw();
+  }
+  requestAnimationFrame(frame);
+})();
+setInterval(() => { if (E.playing) { UI.progress(); save(); } }, 5000);
+
+function toast(msg) {
+  let t = $("#toast");
+  if (!t) {
+    t = document.createElement("div");
+    t.id = "toast";
+    t.style.cssText = "position:fixed;left:50%;bottom:calc(var(--player-h) + 16px);transform:translateX(-50%);background:var(--raised);padding:9px 16px;border-radius:999px;box-shadow:0 8px 30px #0008;z-index:9;transition:opacity .3s";
+    document.body.append(t);
+  }
+  t.textContent = msg;
+  t.style.opacity = 1;
+  clearTimeout(t._h);
+  t._h = setTimeout(() => { t.style.opacity = 0; }, 2200);
+}
+
+// ---- views -----------------------------------------------------------------------------
+
+const view = $("#view");
+let lists = {}; // track lists rendered in the current view, by id
+let routeSeq = 0;
+
+function markPlaying() {
+  const id = Q.cur()?.id;
+  view.querySelectorAll("tr[data-id]").forEach(r => r.classList.toggle("playing", r.dataset.id === id));
+}
+
+function card(href, img, t, s, round = false) {
+  return `<a class="card ${round ? "round" : ""}" href="${href}">${img ? `<img loading="lazy" src="${esc(img)}" alt="">` : `<div class="ph"></div>`}
+    <div class="t">${esc(t)}</div><div class="s">${esc(s || "")}</div></a>`;
+}
+
+function trackTable(listId, tracks, { numbers = false, album = true } = {}) {
+  lists[listId] = tracks;
+  return `<table class="tracks"><tbody>${tracks.map((t, i) => `
+    <tr data-list="${listId}" data-i="${i}" data-id="${esc(t.id)}">
+      <td class="n">${numbers ? t.index ?? i + 1 : i + 1}</td>
+      <td class="ti">${esc(t.title)}${Stems.find(t) ? '<span class="stem-dot">STEMS</span>' : ""}${album ? `<small>${esc([t.artist, t.album].filter(Boolean).join(" · "))}</small>` : ""}</td>
+      <td class="d">${fmtTime(t.duration / 1000)}</td>
+      <td><button class="add" data-add="${i}" title="Add to queue (shift: play next)">+</button></td>
+    </tr>`).join("")}</tbody></table>`;
+}
+
+view.addEventListener("click", ev => {
+  const add = ev.target.closest("[data-add]");
+  const row = ev.target.closest("tr[data-list]");
+  if (add && row) { Q.add([lists[row.dataset.list][+add.dataset.add]], ev.shiftKey); return; }
+  if (row) { Q.playList(lists[row.dataset.list], +row.dataset.i, false); return; }
+  const act = ev.target.closest("[data-play]");
+  if (act) {
+    const tracks = lists[act.dataset.play];
+    if (act.dataset.mode === "queue") Q.add(tracks);
+    else Q.playList(tracks, act.dataset.mode === "shuffle" ? -1 : 0, act.dataset.mode === "shuffle");
+  }
+});
+
+const playButtons = id => `<div class="actions">
+  <button class="btn primary" data-play="${id}">${ICON.play} Play</button>
+  <button class="btn" data-play="${id}" data-mode="shuffle">${ICON.shuffle} Shuffle</button>
+  <button class="btn" data-play="${id}" data-mode="queue">${ICON.queue} Add to queue</button></div>`;
+
+function needPlex() {
+  view.innerHTML = `<h1>Welcome</h1><p class="sub">Sign in to Plex in <a href="#/settings" style="color:var(--accent)">Settings</a> to browse your library, or open <a href="#/stems" style="color:var(--accent)">Stems only</a>.</p>`;
+}
+
+// Grid of Plex items, loaded 120 at a time as you scroll.
+async function pagedGrid(seq, path, params, cardFn) {
+  const grid = $(".grid", view), more = document.createElement("div");
+  more.className = "more";
+  grid.after(more);
+  let start = 0, total = Infinity, busy = false;
+  const next = async () => {
+    if (busy || start >= total || seq !== routeSeq) return;
+    busy = true;
+    const mc = await px(path, { ...params, "X-Plex-Container-Start": start, "X-Plex-Container-Size": 120 });
+    if (seq !== routeSeq) return;
+    total = mc.totalSize ?? mc.size ?? 0;
+    const items = mc.Metadata || [];
+    start += items.length;
+    if (!items.length) total = start;
+    grid.insertAdjacentHTML("beforeend", items.map(cardFn).join(""));
+    if (!start) grid.outerHTML = `<p class="empty-msg">Nothing here.</p>`;
+    busy = false;
+    if (more.getBoundingClientRect().top < innerHeight * 1.5) next();
+  };
+  new IntersectionObserver(es => { if (es[0].isIntersecting) next(); }, { root: view, rootMargin: "600px" }).observe(more);
+  await next();
+}
+
+const albumCard = m => card(`#/album/${m.ratingKey}`, plexImg(m.thumb), m.title, [m.parentTitle, m.year].filter(Boolean).join(" · "));
+
+const routes = {
+  async albums(seq) {
+    if (!S.plex) return needPlex();
+    const sec = await musicSection();
+    view.innerHTML = `<div class="bar"><h1>Albums</h1>
+      <select id="sort">${[["titleSort", "Title"], ["addedAt:desc", "Recently added"], ["year:desc", "Year"], ["artist.titleSort", "Artist"]]
+        .map(([v, l]) => `<option value="${v}" ${S.albumSort === v ? "selected" : ""}>${l}</option>`).join("")}</select></div><div class="grid"></div>`;
+    $("#sort").onchange = ev => { S.albumSort = ev.target.value; save(); route(); };
+    await pagedGrid(seq, `/library/sections/${sec}/all`, { type: 9, sort: S.albumSort }, albumCard);
+  },
+  async artists(seq) {
+    if (!S.plex) return needPlex();
+    const sec = await musicSection();
+    view.innerHTML = `<div class="bar"><h1>Artists</h1></div><div class="grid"></div>`;
+    await pagedGrid(seq, `/library/sections/${sec}/all`, { type: 8, sort: "titleSort" },
+      m => card(`#/artist/${m.ratingKey}`, plexImg(m.thumb), m.title, "", true));
+  },
+  async playlists() {
+    if (!S.plex) return needPlex();
+    const pls = (await px("/playlists", { playlistType: "audio" })).Metadata || [];
+    view.innerHTML = `<div class="bar"><h1>Playlists</h1></div>` + (pls.length
+      ? `<div class="grid">${pls.map(p => card(`#/playlist/${p.ratingKey}`, plexImg(p.composite || p.thumb), p.title, `${p.leafCount} tracks`)).join("")}</div>`
+      : `<p class="empty-msg">No music playlists.</p>`);
+  },
+  async album(seq, key) {
+    const [info, kids] = await Promise.all([px(`/library/metadata/${key}`), px(`/library/metadata/${key}/children`)]);
+    const a = info.Metadata?.[0] || {}, tracks = (kids.Metadata || []).map(plexTrack);
+    const stems = tracks.filter(t => Stems.find(t)).length;
+    view.innerHTML = `<div class="hero"><img src="${esc(plexImg(a.thumb, 420))}" alt="">
+      <div class="meta"><div class="kind">Album</div><h1>${esc(a.title)}</h1>
+      <div class="sub"><a href="#/artist/${a.parentRatingKey}">${esc(a.parentTitle)}</a>${a.year ? " · " + a.year : ""} · ${tracks.length} tracks${stems ? ` · ${stems} with stems` : ""}</div>
+      ${playButtons("album")}</div></div>${trackTable("album", tracks, { numbers: true, album: false })}`;
+  },
+  async artist(seq, key) {
+    const [info, kids] = await Promise.all([px(`/library/metadata/${key}`), px(`/library/metadata/${key}/children`)]);
+    const a = info.Metadata?.[0] || {};
+    view.innerHTML = `<div class="hero"><img src="${esc(plexImg(a.thumb, 420))}" alt="" style="border-radius:50%">
+      <div class="meta"><div class="kind">Artist</div><h1>${esc(a.title)}</h1>${playButtons("artist")}</div></div>
+      <h2>Albums</h2><div class="grid">${(kids.Metadata || []).map(albumCard).join("")}</div>`;
+    lists.artist = [];
+    const all = await px(`/library/metadata/${key}/allLeaves`);
+    if (seq === routeSeq) lists.artist = (all.Metadata || []).map(plexTrack);
+  },
+  async playlist(seq, key) {
+    const [info, items] = await Promise.all([px(`/playlists/${key}`), px(`/playlists/${key}/items`)]);
+    const p = info.Metadata?.[0] || {}, tracks = (items.Metadata || []).map(plexTrack);
+    view.innerHTML = `<div class="hero"><img src="${esc(plexImg(p.composite || p.thumb, 420))}" alt="">
+      <div class="meta"><div class="kind">Playlist</div><h1>${esc(p.title)}</h1><div class="sub">${tracks.length} tracks</div>${playButtons("playlist")}</div></div>
+      ${trackTable("playlist", tracks)}`;
+  },
+  async search(seq, q) {
+    if (!S.plex) return needPlex();
+    const hubs = (await px("/hubs/search", { query: q, limit: 12, sectionId: await musicSection() })).Hub || [];
+    const hub = t => hubs.find(h => h.type === t)?.Metadata || [];
+    const artists = hub("artist"), albums = hub("album"), tracks = hub("track").map(plexTrack);
+    view.innerHTML = `<div class="bar"><h1>“${esc(q)}”</h1></div>` +
+      (artists.length ? `<h2>Artists</h2><div class="grid">${artists.map(m => card(`#/artist/${m.ratingKey}`, plexImg(m.thumb), m.title, "", true)).join("")}</div>` : "") +
+      (albums.length ? `<h2>Albums</h2><div class="grid">${albums.map(albumCard).join("")}</div>` : "") +
+      (tracks.length ? `<h2>Songs</h2>${trackTable("search", tracks)}` : "") +
+      (!artists.length && !albums.length && !tracks.length ? `<p class="empty-msg">No results.</p>` : "");
+  },
+  async stems(seq) {
+    if (!Stems.entries.length) await Stems.refresh();
+    const all = Stems.entries.map(stemTrack).sort((a, b) => a.id.localeCompare(b.id));
+    view.innerHTML = `<div class="bar"><h1>Stems only</h1><input type="text" id="sf" placeholder="Filter ${all.length} tracks"></div><div id="sl"></div>`;
+    const render = () => {
+      const f = $("#sf").value.toLowerCase();
+      const hits = f ? all.filter(t => t.stem.key.toLowerCase().includes(f)) : all;
+      $("#sl").innerHTML = (hits.length ? trackTable("stems", hits.slice(0, 400)) : `<p class="empty-msg">${Stems.ok ? "No matches." : "Can't reach stemserve. Check Settings."}</p>`) +
+        (hits.length > 400 ? `<p class="note">Showing 400 of ${hits.length}. Filter to narrow it down.</p>` : "");
+      markPlaying();
+    };
+    $("#sf").oninput = render;
+    render();
+  },
+  async settings() {
+    const info = await fetch(stemBase() + "/api/info" + stemQuery()).then(r => r.ok ? r.json() : null).catch(() => null);
+    let secs = [];
+    if (S.plex) secs = ((await px("/library/sections").catch(() => ({}))).Directory || []).filter(d => d.type === "artist");
+    view.innerHTML = `<h1>Settings</h1>
+      <h2>Plex</h2><div class="form">
+        <p class="note">${S.plex ? `Plex: <b>${esc(S.plex.env ? "via this server" : S.plex.name && S.plex.name !== S.plex.url ? S.plex.name + " (" + S.plex.url + ")" : S.plex.url)}</b>${S.plex.env ? " (set by the server)" : ""}` : "Not signed in."}</p>
+        <div class="row"><button class="btn primary" id="signin">Sign in with Plex</button>${S.plex ? `<button class="btn" id="signout">Sign out</button>` : ""}<span class="note" id="sstatus"></span></div>
+        ${secs.length > 1 ? `<label>Music library<select id="sec">${secs.map(d => `<option value="${d.key}" ${d.key == S.section ? "selected" : ""}>${esc(d.title)}</option>`).join("")}</select></label>` : ""}
+        <details><summary class="note">Enter a server and token by hand</summary><div class="form" style="margin-top:12px">
+          <label>Server URL<input type="url" id="purl" placeholder="http://10.0.0.2:32400" value="${esc(S.plex?.url || "")}"></label>
+          <label>Token<input type="password" id="ptok" value="${esc(S.plex?.token || "")}"></label>
+          <div class="row"><button class="btn" id="psave">Save</button></div></div></details>
+      </div>
+      <h2>Stem server</h2><div class="form">
+        <p class="note">${info ? `stemserve v${info.version}, ${info.tracks} tracks with stems${info.ffmpeg ? ", Opus available" : ""}.` : "Can't reach stemserve."}</p>
+        <label>URL (blank = this page's server)<input type="url" id="surl" placeholder="${esc(location.origin)}" value="${esc(S.stemUrl)}"></label>
+        <label>Token (if stemserve has TOKEN set)<input type="password" id="stok" value="${esc(S.stemToken)}"></label>
+        <label>Stream format<select id="fmt">${[["opus96", "Opus 96 kbps"], ["opus160", "Opus 160 kbps"], ["opus256", "Opus 256 kbps"], ["flac", "FLAC (original)"]]
+          .map(([v, l]) => `<option value="${v}" ${S.fmt === v ? "selected" : ""}>${l}</option>`).join("")}</select></label>
+        <div class="row"><button class="btn" id="ssave">Save</button></div>
+      </div>
+      <h2>Keys</h2><p class="note">Space play/pause · ←/→ seek 5s (shift 30s) · S shuffle · R repeat · [ ] speed · M mixer · Q queue</p>`;
+    $("#signin").onclick = async () => {
+      const st = $("#sstatus");
+      try { S.plex = await plexSignIn(m => { st.textContent = m; }); S.section = null; save(); route(); }
+      catch (e) { st.textContent = e.message; }
+    };
+    if ($("#signout")) $("#signout").onclick = () => { S.plex = null; S.section = null; save(); route(); };
+    if ($("#sec")) $("#sec").onchange = ev => { S.section = ev.target.value; save(); };
+    $("#psave").onclick = () => {
+      const url = $("#purl").value.trim().replace(/\/+$/, ""), token = $("#ptok").value.trim();
+      S.plex = url && token ? { url, token, name: "" } : null; S.section = null; save(); route();
+    };
+    $("#ssave").onclick = async () => {
+      S.stemUrl = $("#surl").value.trim(); S.stemToken = $("#stok").value.trim(); S.fmt = $("#fmt").value;
+      Stems.etag = null; save(); await Stems.refresh(); route();
+    };
+  },
+};
+
+async function route() {
+  const seq = ++routeSeq;
+  const [, name = "albums", ...rest] = (location.hash || "#/albums").split("/");
+  const arg = decodeURIComponent(rest.join("/"));
+  document.querySelectorAll("#nav a").forEach(a => a.classList.toggle("on", a.dataset.nav === name));
+  lists = {};
+  view.scrollTop = 0;
+  try { await (routes[name] || routes.albums)(seq, arg); }
+  catch (e) { if (seq === routeSeq) view.innerHTML = `<h1>Something went wrong</h1><p class="sub">${esc(e.message)}</p>`; }
+  if (seq === routeSeq) markPlaying();
+}
+addEventListener("hashchange", route);
+$("#search").onsubmit = ev => {
+  ev.preventDefault();
+  const q = ev.target.q.value.trim();
+  if (q) location.hash = "#/search/" + encodeURIComponent(q);
+};
+
+// Plex from the server's PLEX_URL / PLEX_TOKEN when nothing was signed in by hand, and a
+// local stemserve when this page's own server has none.
+async function autoConnect() {
+  const ok = await Stems.refresh();
+  if (!ok && !Stems.ok && !S.stemUrl && !/^(localhost|127\.0\.0\.1)$/.test(location.hostname)) {
+    for (const u of ["http://localhost:8765", "http://127.0.0.1:8765"]) {
+      try {
+        const r = await fetch(u + "/api/info" + stemQuery(), { signal: AbortSignal.timeout(1500) });
+        if (r.ok) { S.stemUrl = u; save(); await Stems.refresh(); break; }
+      } catch {}
+    }
+  }
+  if (!S.plex || S.plex.env) {
+    try {
+      const c = await fetch(stemBase() + "/api/config" + stemQuery()).then(r => r.ok ? r.json() : null);
+      if (c?.plex) S.plex = { token: c.plex.token, url: stemBase() + "/plex", name: "", env: true };
+      else if (S.plex?.env) S.plex = null;
+      save();
+    } catch {}
+  }
+}
+
+// ---- start -----------------------------------------------------------------------------
+
+(async () => {
+  await Promise.race([autoConnect(), new Promise(r => setTimeout(r, 4000))]);
+  const saved = load(KEY + "-queue");
+  if (saved?.items?.length) {
+    Q.items = saved.items; Q.orig = saved.orig; Q.i = Math.min(saved.i, saved.items.length - 1);
+    uidSeq = Math.max(uidSeq, ...saved.items.map(x => x.uid + 1));
+    if (Q.orig) Q.orig = Q.orig.map(o => Q.items.find(x => x.uid === o.uid) || o);
+    Q.start(saved.pos || 0, false);
+  }
+  UI.all();
+  route();
+  setInterval(() => Stems.refresh(), 5 * 60 * 1000);
+})();

web/index.html

@@ -0,0 +1,52 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
+<meta name="theme-color" content="#0d0e12">
+<title>Stemify</title>
+<link rel="stylesheet" href="style.css">
+</head>
+<body>
+<div id="app">
+  <aside id="nav">
+    <div class="brand">stemify</div>
+    <a href="#/albums" data-nav="albums">Albums</a>
+    <a href="#/artists" data-nav="artists">Artists</a>
+    <a href="#/playlists" data-nav="playlists">Playlists</a>
+    <a href="#/stems" data-nav="stems">Stems only</a>
+    <form id="search"><input type="search" name="q" placeholder="Search" autocomplete="off"></form>
+    <a href="#/settings" data-nav="settings" class="settings-link">Settings</a>
+  </aside>
+  <main id="view"></main>
+  <aside id="drawer" hidden></aside>
+</div>
+<footer id="player" class="empty">
+  <div class="np">
+    <img id="np-art" alt="">
+    <div class="np-text"><div id="np-title"></div><div id="np-sub"></div></div>
+  </div>
+  <div class="center">
+    <div class="transport">
+      <button id="b-shuffle" class="side" title="Shuffle (S)"></button>
+      <button id="b-prev" title="Previous"></button>
+      <button id="b-play" class="play" title="Play (Space)"></button>
+      <button id="b-next" title="Next"></button>
+      <button id="b-repeat" class="side" title="Repeat (R)"></button>
+    </div>
+    <div class="seek">
+      <span id="t-pos">0:00</span>
+      <canvas id="wave"></canvas>
+      <span id="t-dur">0:00</span>
+    </div>
+  </div>
+  <div class="right">
+    <select id="speed" title="Speed"></select>
+    <button id="b-mixer" class="pill" title="Mixer (M)"></button>
+    <button id="b-queue" class="pill" title="Queue (Q)"></button>
+    <input id="volume" type="range" min="0" max="1" step="0.01" title="Volume">
+  </div>
+</footer>
+<script type="module" src="app.js"></script>
+</body>
+</html>

web/style.css

@@ -0,0 +1,150 @@
+:root {
+  --bg: #0d0e12;
+  --panel: #15171d;
+  --raised: #1d2028;
+  --line: #262a33;
+  --text: #eceef3;
+  --muted: #8a8f9c;
+  --accent: #f2b544;
+  --accent-ink: #1a1306;
+  --radius: 12px;
+  --player-h: 96px;
+  color-scheme: dark;
+}
+* { box-sizing: border-box; }
+html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
+  font: 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; }
+button, input, select { font: inherit; color: inherit; }
+button { background: none; border: 0; cursor: pointer; padding: 0; }
+a { color: inherit; text-decoration: none; }
+svg { width: 1em; height: 1em; fill: currentColor; display: block; }
+
+#app { display: grid; grid-template-columns: 210px 1fr auto; height: calc(100% - var(--player-h)); }
+#nav { background: var(--panel); border-right: 1px solid var(--line); padding: 20px 12px; display: flex; flex-direction: column; gap: 2px; }
+.brand { white-space: nowrap; font-weight: 800; font-size: 20px; letter-spacing: -0.02em; padding: 0 10px 18px; }
+.brand::after { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-left: 3px; }
+#nav a { padding: 8px 10px; border-radius: 8px; color: var(--muted); font-weight: 500; }
+#nav a:hover { color: var(--text); }
+#nav a.on { background: var(--raised); color: var(--text); }
+#search input { width: 100%; margin: 12px 0; padding: 8px 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; outline: none; }
+#search input:focus { border-color: var(--accent); }
+.settings-link { margin-top: auto; }
+
+#view { overflow-y: auto; padding: 28px 32px 48px; }
+h1 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 4px; }
+h2 { font-size: 17px; margin: 28px 0 12px; }
+.sub { color: var(--muted); }
+.bar { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; flex-wrap: wrap; }
+.bar h1 { margin-right: auto; }
+select, input[type=text], input[type=url], input[type=password] { background: var(--raised); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; outline: none; }
+
+.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 22px 18px; }
+.card { display: block; min-width: 0; }
+.card img, .card .ph { width: 100%; aspect-ratio: 1; border-radius: 10px; object-fit: cover; background: var(--raised); display: block; transition: transform .15s; }
+.card:hover img { transform: translateY(-2px); }
+.card.round img, .card.round .ph { border-radius: 50%; }
+.card .t { margin-top: 8px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.card .s { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+
+.hero { display: flex; gap: 28px; align-items: flex-end; margin-bottom: 26px; }
+.hero img { width: 210px; height: 210px; border-radius: var(--radius); object-fit: cover; background: var(--raised); box-shadow: 0 20px 50px #0008; }
+.hero .meta { min-width: 0; }
+.hero .kind { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }
+.actions { display: flex; gap: 10px; margin-top: 16px; }
+.btn { background: var(--raised); border-radius: 999px; padding: 9px 18px; font-weight: 600; display: inline-flex; gap: 8px; align-items: center; }
+.btn.primary { background: var(--accent); color: var(--accent-ink); }
+.btn:hover { filter: brightness(1.12); }
+
+.tracks { width: 100%; border-collapse: collapse; }
+.tracks tr { border-radius: 8px; }
+.tracks td { padding: 8px 10px; border-bottom: 1px solid #ffffff08; white-space: nowrap; }
+.tracks tr:hover td { background: var(--panel); }
+.tracks tr.playing td { color: var(--accent); }
+.tracks .n { width: 36px; color: var(--muted); text-align: right; }
+.tracks .ti { width: 100%; max-width: 0; overflow: hidden; text-overflow: ellipsis; }
+.tracks .ti small { color: var(--muted); margin-left: 8px; }
+.tracks .d { color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
+.tracks .add { opacity: 0; color: var(--muted); font-size: 18px; }
+.tracks tr:hover .add { opacity: 1; }
+.tracks .add:hover { color: var(--text); }
+.stem-dot { display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: .05em; color: var(--accent); border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; margin-left: 8px; vertical-align: 1px; }
+.more { display: block; margin: 24px auto; }
+.empty-msg { color: var(--muted); padding: 40px 0; }
+
+.form { max-width: 520px; display: grid; gap: 14px; }
+.form label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
+.form label input, .form label select { color: var(--text); font-size: 14px; }
+.form .row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
+.note { color: var(--muted); font-size: 13px; }
+
+#drawer { width: 340px; background: var(--panel); border-left: 1px solid var(--line); overflow-y: auto; padding: 22px 20px; }
+#drawer h2 { margin: 0 0 14px; }
+.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
+.chip { background: var(--raised); border-radius: 999px; padding: 5px 12px; font-size: 13px; font-weight: 500; }
+.chip.on { background: var(--accent); color: var(--accent-ink); }
+.chip:disabled { opacity: .35; cursor: default; }
+.stem { display: grid; grid-template-columns: 1fr auto auto; gap: 8px 6px; align-items: center; padding: 12px 0; border-top: 1px solid var(--line); }
+.stem .name { text-transform: capitalize; font-weight: 600; }
+.stem.silent .name { color: var(--muted); }
+.stem input { grid-column: 1 / -1; width: 100%; }
+.ms { width: 30px; height: 26px; border-radius: 6px; background: var(--raised); font-size: 12px; font-weight: 700; color: var(--muted); }
+.ms.on { background: var(--text); color: var(--bg); }
+.ms.solo.on { background: var(--accent); color: var(--accent-ink); }
+.q-item { display: flex; gap: 10px; align-items: center; padding: 7px 6px; border-radius: 8px; cursor: pointer; }
+.q-item:hover { background: var(--raised); }
+.q-item img { width: 38px; height: 38px; border-radius: 6px; object-fit: cover; background: var(--raised); flex: none; }
+.q-item .tx { min-width: 0; flex: 1; }
+.q-item .tx div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.q-item .tx div + div { color: var(--muted); font-size: 12px; }
+.q-item.cur { background: var(--raised); }
+.q-item.cur .tx div:first-child { color: var(--accent); }
+.q-item.past { opacity: .45; }
+.q-item .x { color: var(--muted); font-size: 18px; padding: 0 4px; opacity: 0; }
+.q-item:hover .x { opacity: 1; }
+
+#player { position: fixed; left: 0; right: 0; bottom: 0; height: var(--player-h); background: #101116ee; backdrop-filter: blur(20px);
+  border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(180px, 1fr) minmax(320px, 1.6fr) minmax(180px, 1fr); align-items: center; gap: 20px; padding: 0 20px; }
+#player.empty .center, #player.empty .right { opacity: .35; pointer-events: none; }
+.np { display: flex; gap: 12px; align-items: center; min-width: 0; }
+#np-art { width: 58px; height: 58px; border-radius: 8px; object-fit: cover; background: var(--raised); flex: none; }
+#np-art:not([src]) { display: none; }
+.np-text { min-width: 0; }
+#np-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+#np-sub { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.center { display: grid; gap: 4px; }
+.transport { display: flex; justify-content: center; align-items: center; gap: 18px; font-size: 20px; }
+.transport button { color: var(--text); }
+.transport .side { color: var(--muted); font-size: 17px; position: relative; }
+.transport .side.on { color: var(--accent); }
+.transport .side.on::after { content: ""; position: absolute; left: 50%; bottom: -6px; width: 4px; height: 4px; margin-left: -2px; border-radius: 50%; background: currentColor; }
+.transport .play { width: 40px; height: 40px; border-radius: 50%; background: var(--text); color: var(--bg); display: grid; place-items: center; font-size: 18px; }
+.transport .play.busy svg { animation: spin 1s linear infinite; }
+@keyframes spin { to { transform: rotate(360deg); } }
+.seek { display: grid; grid-template-columns: 42px 1fr 42px; align-items: center; gap: 10px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
+.seek span:last-child { text-align: right; }
+#wave { width: 100%; height: 32px; cursor: pointer; display: block; }
+.right { display: flex; justify-content: flex-end; align-items: center; gap: 10px; }
+.pill { color: var(--muted); font-size: 18px; width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; }
+.pill.on { background: var(--raised); color: var(--accent); }
+#speed { padding: 5px 6px; font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
+#speed.on { color: var(--accent); border-color: var(--accent); }
+#volume { width: 96px; }
+input[type=range] { accent-color: var(--accent); }
+
+@media (max-width: 860px) {
+  :root { --player-h: 150px; }
+  #app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
+  #nav { flex-direction: row; overflow-x: auto; padding: 10px 12px; border-right: 0; border-bottom: 1px solid var(--line); align-items: center; }
+  .brand { padding: 0 8px 0 4px; }
+  #nav a { white-space: nowrap; }
+  #search input { margin: 0; width: 120px; }
+  .settings-link { margin-top: 0; }
+  #view { padding: 20px 16px 40px; }
+  #drawer { position: fixed; inset: auto 0 var(--player-h) 0; width: auto; max-height: 60vh; border-left: 0; border-top: 1px solid var(--line); z-index: 5; }
+  #player { grid-template-columns: 1fr auto; grid-template-rows: auto auto; gap: 8px 12px; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); }
+  .center { grid-column: 1 / -1; grid-row: 2; }
+  .right #volume { display: none; }
+  .hero { flex-direction: column; align-items: flex-start; }
+  .hero img { width: 160px; height: 160px; }
+  .grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 16px 12px; }
+}