Use App Group for user defaults

Tusker/LocalData.swift

@@ -30,7 +30,20 @@ class LocalData: ObservableObject {
                 ]
             }
         } else {
-            defaults = UserDefaults()
+            defaults = UserDefaults(suiteName: "group.space.vaccor.Tusker")!
+            tryMigrateOldDefaults()
+        }
+    }
+    
+    // TODO: remove me before public beta
+    private func tryMigrateOldDefaults() {
+        let old = UserDefaults()
+        if let accounts = old.array(forKey: accountsKey) as? [[String: String]],
+           let mostRecentAccount = old.string(forKey: mostRecentAccountKey) {
+            defaults.setValue(accounts, forKey: accountsKey)
+            defaults.setValue(mostRecentAccount, forKey: mostRecentAccountKey)
+            old.removeObject(forKey: accountsKey)
+            old.removeObject(forKey: mostRecentAccountKey)
         }
     }
     

Tusker/Tusker.entitlements

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.space.vaccor.Tusker</string>
+	</array>
+	<key>com.apple.security.device.audio-input</key>
+	<true/>
+	<key>com.apple.security.device.camera</key>
+	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
+	<key>com.apple.security.personal-information.photos-library</key>
+	<true/>
+</dict>
+</plist>