fix: Last.fm scrobbling and LocalLibrary cover art

- Restore Last.fm session on app startup (not just when visiting Settings)
- Fix LocalLibrary artwork: use asset://localhost/ instead of file://
- Add fs:allow-read capability for asset protocol
- Enable assetProtocol in tauri.conf.json

src-tauri/capabilities/default.json

@@ -8,6 +8,16 @@
     "opener:default",
     "dialog:default",
     "clipboard-manager:default",
-    "clipboard-manager:allow-write-text"
+    "clipboard-manager:allow-write-text",
+    "fs:default",
+    {
+      "identifier": "fs:allow-read",
+      "allow": [
+        { "path": "$HOME/**" },
+        { "path": "$CACHE/**" },
+        { "path": "$CONFIG/**" },
+        { "path": "/**" }
+      ]
+    }
   ]
 }

src-tauri/tauri.conf.json

@@ -23,7 +23,11 @@
       }
     ],
     "security": {
-      "csp": null
+      "csp": null,
+      "assetProtocol": {
+        "enable": true,
+        "scope": ["**"]
+      }
     }
   },
   "bundle": {