feat(jellyfin): add local server discovery

close #1188

test/screens/settings/add_jellyfin_screen_test.dart

@@ -9,6 +9,7 @@ import 'package:plezy/focus/input_mode_tracker.dart';
 import 'package:plezy/profiles/profile.dart';
 import 'package:plezy/screens/settings/add_jellyfin_screen.dart';
 import 'package:plezy/services/jellyfin_auth_service.dart';
+import 'package:plezy/services/jellyfin_lan_discovery_service.dart';
 import 'package:plezy/utils/platform_detector.dart';
 
 Profile _profile(String id) =>
@@ -35,6 +36,32 @@ JellyfinConnectionAuthService _jellyfinAuthService({bool quickConnectEnabled = f
   );
 }
 
+JellyfinConnectionAuthService _jellyfinAuthServiceForBareHost() {
+  return JellyfinConnectionAuthService(
+    clientName: 'Plezy',
+    clientVersion: 'test',
+    deviceName: 'TestDevice',
+    testHttpClientFactory: () => MockClient((request) async {
+      switch (request.url.path) {
+        case '/System/Info/Public':
+          if (request.url.scheme == 'http' && request.url.host == 'jf.example.com' && request.url.port == 8096) {
+            return http.Response(
+              jsonEncode({'Id': 'srv-1', 'ServerName': 'Home', 'Version': '10.9.0'}),
+              200,
+              headers: {'content-type': 'application/json'},
+            );
+          }
+          throw Exception('offline');
+        case '/QuickConnect/Enabled':
+          return http.Response(jsonEncode(false), 200, headers: {'content-type': 'application/json'});
+      }
+      return http.Response('', 404);
+    }),
+  );
+}
+
+Future<List<DiscoveredJellyfinServer>> _noLocalServers() async => const [];
+
 void main() {
   tearDown(() {
     TvDetectionService.debugSetAppleTVOverride(null);
@@ -42,7 +69,7 @@ void main() {
   });
 
   testWidgets('autofocuses the server URL field', (tester) async {
-    await tester.pumpWidget(const MaterialApp(home: AddJellyfinScreen()));
+    await tester.pumpWidget(MaterialApp(home: AddJellyfinScreen(localDiscoveryFactory: _noLocalServers)));
     await tester.pump();
 
     final field = tester.widget<TextField>(find.byType(TextField));
@@ -53,7 +80,11 @@ void main() {
   testWidgets('TV initial focus opens the server URL keyboard', (tester) async {
     TvDetectionService.debugSetAppleTVOverride(true);
 
-    await tester.pumpWidget(const InputModeTracker(child: MaterialApp(home: AddJellyfinScreen())));
+    await tester.pumpWidget(
+      InputModeTracker(
+        child: MaterialApp(home: AddJellyfinScreen(localDiscoveryFactory: _noLocalServers)),
+      ),
+    );
     await tester.pumpAndSettle();
 
     expect(FocusManager.instance.primaryFocus?.debugLabel, 'TvVirtualKeyboard');
@@ -65,7 +96,11 @@ void main() {
     await TvDetectionService.getInstance(forceTv: true);
     TvDetectionService.setForceTVSync(true);
 
-    await tester.pumpWidget(const InputModeTracker(child: MaterialApp(home: AddJellyfinScreen())));
+    await tester.pumpWidget(
+      InputModeTracker(
+        child: MaterialApp(home: AddJellyfinScreen(localDiscoveryFactory: _noLocalServers)),
+      ),
+    );
     await tester.pumpAndSettle();
 
     expect(FocusManager.instance.primaryFocus?.debugLabel, 'TvVirtualKeyboard');
@@ -83,7 +118,14 @@ void main() {
   });
 
   testWidgets('D-pad moves from URL to credentials after server is found', (tester) async {
-    await tester.pumpWidget(MaterialApp(home: AddJellyfinScreen(authServiceFactory: () => _jellyfinAuthService())));
+    await tester.pumpWidget(
+      MaterialApp(
+        home: AddJellyfinScreen(
+          authServiceFactory: () => _jellyfinAuthService(),
+          localDiscoveryFactory: _noLocalServers,
+        ),
+      ),
+    );
     await tester.pump();
 
     await tester.enterText(find.byType(TextField).first, 'https://jf.example.com');
@@ -106,6 +148,49 @@ void main() {
     expect(FocusManager.instance.primaryFocus?.debugLabel, 'AddJellyfin:Url');
   });
 
+  testWidgets('accepts a bare Jellyfin host and expands it before probing', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: AddJellyfinScreen(
+          authServiceFactory: () => _jellyfinAuthServiceForBareHost(),
+          localDiscoveryFactory: _noLocalServers,
+        ),
+      ),
+    );
+    await tester.pump();
+
+    await tester.enterText(find.byType(TextField).first, 'jf.example.com');
+    await tester.testTextInput.receiveAction(TextInputAction.go);
+    await tester.pumpAndSettle();
+
+    final field = tester.widget<TextField>(find.byType(TextField).first);
+    expect(field.controller?.text, 'http://jf.example.com:8096');
+    expect(find.text('Home'), findsOneWidget);
+  });
+
+  testWidgets('selecting a discovered Jellyfin server probes that address', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: AddJellyfinScreen(
+          authServiceFactory: () => _jellyfinAuthService(),
+          localDiscoveryFactory: () async => [
+            DiscoveredJellyfinServer(address: 'http://192.168.1.20:8096', id: 'srv-1', name: 'Home'),
+          ],
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('Home'), findsOneWidget);
+
+    await tester.tap(find.text('Home'));
+    await tester.pumpAndSettle();
+
+    final field = tester.widget<TextField>(find.byType(TextField).first);
+    expect(field.controller?.text, contains('http://192.168.1.20:8096'));
+    expect(find.text('Jellyfin 10.9.0'), findsOneWidget);
+  });
+
   group('Jellyfin profile binding decisions', () {
     test('creates a local profile only on true first-run with no profiles', () {
       expect(shouldCreateLocalJellyfinProfile(targetProfile: null, activeProfile: null, hasProfiles: false), isTrue);