Aurora SpotiRip desktop and web app

- Spotify playlist, library, album and artist browsing with in-app playback
- Song, playlist and album downloads via spotdl with YouTube and Bandcamp fallbacks
- Electron desktop app (castLabs Widevine) with a permanent sidebar layout
- Linux and Windows packaging scripts

components/MobileNav.module.css

@@ -0,0 +1,51 @@
+.nav{
+  display:none;
+}
+@media(max-width:900px){
+  .nav{
+    position:fixed;
+    left:0;
+    right:0;
+    bottom:0;
+    z-index:60;
+    height:68px;
+    display:grid;
+    grid-template-columns:repeat(5,1fr);
+    align-items:stretch;
+    padding:6px 8px max(6px,env(safe-area-inset-bottom));
+    background:#0f1116;
+    border-top:1px solid #2b3038;
+    box-shadow:0 -8px 24px rgba(0,0,0,.28);
+  }
+  .item{
+    appearance:none;
+    border:0;
+    background:transparent;
+    color:#6f7984;
+    text-decoration:none;
+    display:flex;
+    flex-direction:column;
+    align-items:center;
+    justify-content:center;
+    gap:4px;
+    min-width:0;
+    padding:4px 2px;
+    font:600 .58rem/1 var(--font-family-base);
+    cursor:pointer;
+  }
+  .item svg{flex:0 0 auto}
+  .item span{
+    width:100%;
+    overflow:hidden;
+    white-space:nowrap;
+    text-overflow:ellipsis;
+    text-align:center;
+  }
+  .item.active{
+    color:#79e6ef;
+  }
+  .menu{
+    min-width:190px;
+    margin-bottom:4px;
+  }
+}