feat: add local-first private AI digest workflow

Migrate app code into canonical feature slices, add phone-only AI digest scheduling and review, wire local notification/background task support, and cover the flow with tests.

ios/Runner/Info.plist

@@ -12,6 +12,8 @@
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>AppGroupId</key>
+	<string>$(CUSTOM_GROUP_ID)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
@@ -24,8 +26,21 @@
 	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>ShareMedia-$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+			</array>
+		</dict>
+	</array>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>Relationship Saver can import shared media and links you send into the app.</string>
 	<key>UIApplicationSceneManifest</key>
 	<dict>
 		<key>UIApplicationSupportsMultipleScenes</key>
@@ -49,6 +64,15 @@
 	</dict>
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>fetch</string>
+		<string>processing</string>
+	</array>
+	<key>BGTaskSchedulerPermittedIdentifiers</key>
+	<array>
+		<string>com.relationshipsaver.llm.digest</string>
+	</array>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>