feat(mobile): offline downloads, persistent event queue and offline start (M5)

- Downloads queue (2 parallel, Wi-Fi only by default) stores files under
  the app's document directory and track metadata in SQLite; Collection
  gets a Downloads tab, album and player screens get download buttons.
- Player plays downloaded files and local covers; My Wave falls back to
  a shuffle of downloaded tracks when the server is unreachable.
- Playback events that fail on the network are kept in SQLite and sent
  when the connection returns.
- AuthSession can open offline with the cached user and fetches an
  access token before the first request once online.

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

pnpm-lock.yaml

@@ -65,6 +65,9 @@ importers:
       expo-secure-store:
         specifier: ~14.2.4
         version: 14.2.4(expo@53.0.27(@babel/core@7.29.7)(@expo/metro-runtime@5.0.5(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)(supports-color@10.2.2))
+      expo-sqlite:
+        specifier: ~15.2.14
+        version: 15.2.14(expo@53.0.27(@babel/core@7.29.7)(@expo/metro-runtime@5.0.5(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)(supports-color@10.2.2))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)
       expo-status-bar:
         specifier: ~2.2.3
         version: 2.2.3(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)
@@ -1619,6 +1622,9 @@ packages:
   async-limiter@1.0.1:
     resolution: {integrity: sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==}
 
+  await-lock@2.2.2:
+    resolution: {integrity: sha512-aDczADvlvTGajTDjcjpJMqRkOF6Qdz3YbPZm/PyW6tKPkx2hlYBzxMhEywM/tU72HrVZjgl5VCdRuMlA7pZ8Gw==}
+
   babel-jest@29.7.0:
     resolution: {integrity: sha512-BrvGY3xZSwEcCzKvKsCi2GgHqDqsYkOP4/by5xCgIwGXQxIEh+8ew3gmrE1y7XRR6LHZIj6yLYnUi/mm2KXKBg==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
@@ -2155,6 +2161,13 @@ packages:
     peerDependencies:
       expo: '*'
 
+  expo-sqlite@15.2.14:
+    resolution: {integrity: sha512-6tWnEE0fcir30/e7eVwjeC7eKdncfVnIgo2JvnKpRndedyiFMXLMyOQWNVGnuhnSrPV2BHvGGjLByS/j5VgH4w==}
+    peerDependencies:
+      expo: '*'
+      react: '*'
+      react-native: '*'
+
   expo-status-bar@2.2.3:
     resolution: {integrity: sha512-+c8R3AESBoduunxTJ8353SqKAKpxL6DvcD8VKBuh81zzJyUUbfB4CVjr1GufSJEKsMzNPXZU+HJwXx7Xh7lx8Q==}
     peerDependencies:
@@ -5568,6 +5581,8 @@ snapshots:
 
   async-limiter@1.0.1: {}
 
+  await-lock@2.2.2: {}
+
   babel-jest@29.7.0(@babel/core@7.29.7):
     dependencies:
       '@babel/core': 7.29.7
@@ -6152,6 +6167,13 @@ snapshots:
     dependencies:
       expo: 53.0.27(@babel/core@7.29.7)(@expo/metro-runtime@5.0.5(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)(supports-color@10.2.2)
 
+  expo-sqlite@15.2.14(expo@53.0.27(@babel/core@7.29.7)(@expo/metro-runtime@5.0.5(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)(supports-color@10.2.2))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0):
+    dependencies:
+      await-lock: 2.2.2
+      expo: 53.0.27(@babel/core@7.29.7)(@expo/metro-runtime@5.0.5(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)))(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0)(supports-color@10.2.2)
+      react: 19.0.0
+      react-native: 0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2)
+
   expo-status-bar@2.2.3(react-native@0.79.6(@babel/core@7.29.7)(@types/react@19.0.14)(react@19.0.0)(supports-color@10.2.2))(react@19.0.0):
     dependencies:
       react: 19.0.0