Poprawki

lib/core/router/app_router.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:trainhub_flutter/presentation/analysis/analysis_page.dart';
 import 'package:trainhub_flutter/presentation/calendar/calendar_page.dart';
 import 'package:trainhub_flutter/presentation/chat/chat_page.dart';
+import 'package:trainhub_flutter/presentation/grading/grading_page.dart';
 import 'package:trainhub_flutter/presentation/home/home_page.dart';
 import 'package:trainhub_flutter/presentation/plan_editor/plan_editor_page.dart';
 import 'package:trainhub_flutter/presentation/settings/knowledge_base_page.dart';
@@ -29,6 +30,7 @@ class AppRouter extends RootStackRouter {
         AutoRoute(page: TrainingsRoute.page),
         AutoRoute(page: AnalysisRoute.page),
         AutoRoute(page: CalendarRoute.page),
+        AutoRoute(page: GradingRoute.page),
         AutoRoute(page: ChatRoute.page),
       ],
     ),

lib/core/router/app_router.gr.dart

@@ -58,6 +58,22 @@ class ChatRoute extends PageRouteInfo<void> {
   );
 }
 
+/// generated route for
+/// [GradingPage]
+class GradingRoute extends PageRouteInfo<void> {
+  const GradingRoute({List<PageRouteInfo>? children})
+    : super(GradingRoute.name, initialChildren: children);
+
+  static const String name = 'GradingRoute';
+
+  static PageInfo page = PageInfo(
+    name,
+    builder: (data) {
+      return const GradingPage();
+    },
+  );
+}
+
 /// generated route for
 /// [HomePage]
 class HomeRoute extends PageRouteInfo<void> {

lib/data/services/ai_settings_service.dart

@@ -7,7 +7,7 @@ import 'package:path_provider/path_provider.dart';
 
 /// Which backend answers chat requests. Embeddings (knowledge base) always
 /// stay on the local Nomic server regardless of this choice.
-enum AiProvider { local, ollama, lmstudio, anthropic, openai, gemini }
+enum AiProvider { local, ollama, lmstudio, anthropic, openai, gemini, openrouter }
 
 extension AiProviderX on AiProvider {
   String get label => switch (this) {
@@ -17,6 +17,7 @@ extension AiProviderX on AiProvider {
     AiProvider.anthropic => 'Anthropic (Claude)',
     AiProvider.openai => 'OpenAI (GPT)',
     AiProvider.gemini => 'Google (Gemini)',
+    AiProvider.openrouter => 'OpenRouter',
   };
 
   String get defaultModel => switch (this) {
@@ -26,6 +27,9 @@ extension AiProviderX on AiProvider {
     AiProvider.anthropic => 'claude-opus-4-8',
     AiProvider.openai => 'gpt-5.1',
     AiProvider.gemini => 'gemini-2.5-flash',
+    // OpenRouter routes to any model — IDs like "anthropic/claude-opus-4.8",
+    // "openai/gpt-4o", "meta-llama/llama-3.3-70b-instruct".
+    AiProvider.openrouter => 'openai/gpt-4o',
   };
 
   /// Self-hosted OpenAI-compatible servers reachable over a base URL.
@@ -39,7 +43,10 @@ extension AiProviderX on AiProvider {
   };
 
   bool get needsApiKey => switch (this) {
-    AiProvider.anthropic || AiProvider.openai || AiProvider.gemini => true,
+    AiProvider.anthropic ||
+    AiProvider.openai ||
+    AiProvider.gemini ||
+    AiProvider.openrouter => true,
     _ => false,
   };
 }

lib/data/services/grading_service.dart

@@ -0,0 +1,252 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart' show Color;
+import 'package:path/path.dart' as p;
+import 'package:path_provider/path_provider.dart';
+
+/// One belt level with its ITF grading requirements.
+class BeltLevel {
+  const BeltLevel({
+    required this.id,
+    required this.gup,
+    required this.name,
+    required this.baseColor,
+    this.stripeColor,
+    required this.requirements,
+  });
+
+  final String id;
+  final String gup;
+  final String name;
+  final Color baseColor;
+  final Color? stripeColor;
+  final List<String> requirements;
+}
+
+/// Tracks grading preparation: which requirements are checked off per belt,
+/// and which belt the user is currently preparing for. Persisted as JSON.
+class GradingService extends ChangeNotifier {
+  static const _fileName = 'trainhub_grading.json';
+
+  String? _currentBeltId;
+  Map<String, Set<int>> _checked = {};
+  bool _loaded = false;
+
+  String? get currentBeltId => _currentBeltId;
+
+  bool isChecked(String beltId, int index) =>
+      _checked[beltId]?.contains(index) ?? false;
+
+  int checkedCount(String beltId) => _checked[beltId]?.length ?? 0;
+
+  double progress(BeltLevel belt) => belt.requirements.isEmpty
+      ? 0
+      : checkedCount(belt.id) / belt.requirements.length;
+
+  Future<File> _file() async {
+    final dir = await getApplicationDocumentsDirectory();
+    return File(p.join(dir.path, _fileName));
+  }
+
+  Future<void> ensureLoaded() async {
+    if (_loaded) return;
+    _loaded = true;
+    try {
+      final file = await _file();
+      if (!file.existsSync()) return;
+      final json = jsonDecode(await file.readAsString());
+      _currentBeltId = json['current'] as String?;
+      _checked = {
+        for (final entry in (json['checked'] as Map? ?? {}).entries)
+          entry.key as String: {
+            for (final i in entry.value as List) (i as num).toInt(),
+          },
+      };
+      notifyListeners();
+    } catch (e) {
+      if (kDebugMode) debugPrint('Failed to load grading state: $e');
+    }
+  }
+
+  void toggle(String beltId, int index) {
+    final set = _checked.putIfAbsent(beltId, () => {});
+    set.contains(index) ? set.remove(index) : set.add(index);
+    notifyListeners();
+    _persist();
+  }
+
+  void setCurrentBelt(String? beltId) {
+    _currentBeltId = beltId;
+    notifyListeners();
+    _persist();
+  }
+
+  Future<void> _persist() async {
+    try {
+      final file = await _file();
+      await file.writeAsString(
+        jsonEncode({
+          'current': _currentBeltId,
+          'checked': {
+            for (final entry in _checked.entries)
+              entry.key: entry.value.toList(),
+          },
+        }),
+      );
+    } catch (e) {
+      if (kDebugMode) debugPrint('Failed to save grading state: $e');
+    }
+  }
+}
+
+// ---------------------------------------------------------------------------
+// ITF colored-belt syllabus (10 gup → 1 gup)
+// ---------------------------------------------------------------------------
+
+const _white = Color(0xFFF4F4F5);
+const _yellow = Color(0xFFFACC15);
+const _green = Color(0xFF22C55E);
+const _blue = Color(0xFF3B82F6);
+const _red = Color(0xFFFF2B2B);
+const _black = Color(0xFF18181B);
+
+const kBeltSyllabus = <BeltLevel>[
+  BeltLevel(
+    id: '10gup',
+    gup: '10 GUP',
+    name: 'White → Yellow Stripe',
+    baseColor: _white,
+    stripeColor: _yellow,
+    requirements: [
+      'Saju Jirugi (4-direction punch)',
+      'Saju Makgi (4-direction block)',
+      'Stances: charyot, narani, annun, gunnun sogi',
+      'Ap Chagi (front snap kick) — both legs',
+      'Theory: meaning of Taekwon-Do, belt colors, dojang etiquette',
+    ],
+  ),
+  BeltLevel(
+    id: '9gup',
+    gup: '9 GUP',
+    name: 'Yellow Stripe → Yellow',
+    baseColor: _white,
+    stripeColor: _yellow,
+    requirements: [
+      'Tul: Chon-Ji (19 movements)',
+      'Niunja sogi (L-stance) + palmok daebi makgi',
+      'Ap Chagi and Yop Chagi from walking stance',
+      '3-step sparring (Sambo Matsogi) #1–2',
+      'Theory: meaning of Chon-Ji, counting in Korean 1–10',
+    ],
+  ),
+  BeltLevel(
+    id: '8gup',
+    gup: '8 GUP',
+    name: 'Yellow',
+    baseColor: _yellow,
+    requirements: [
+      'Tul: Dan-Gun (21 movements)',
+      'Sonkal daebi makgi (knife-hand guarding block)',
+      'Dollyo Chagi (turning kick) — both legs',
+      '3-step sparring #1–4',
+      'Theory: meaning of Dan-Gun, yellow belt symbolism',
+    ],
+  ),
+  BeltLevel(
+    id: '7gup',
+    gup: '7 GUP',
+    name: 'Yellow → Green Stripe',
+    baseColor: _yellow,
+    stripeColor: _green,
+    requirements: [
+      'Tul: Do-San (24 movements)',
+      'Bakat palmok makgi + sonkal taerigi combinations',
+      'Yopcha Jirugi (side piercing kick) — height improvement',
+      '3-step sparring full set',
+      'Theory: meaning of Do-San (Ahn Chang-Ho)',
+    ],
+  ),
+  BeltLevel(
+    id: '6gup',
+    gup: '6 GUP',
+    name: 'Green',
+    baseColor: _green,
+    requirements: [
+      'Tul: Won-Hyo (28 movements)',
+      'Gojung sogi (fixed stance) + punch',
+      'Goro Chagi (hooking kick), Naeryo Chagi (downward kick)',
+      '2-step sparring (Ibo Matsogi) #1–3',
+      'Theory: meaning of Won-Hyo, green belt symbolism',
+    ],
+  ),
+  BeltLevel(
+    id: '5gup',
+    gup: '5 GUP',
+    name: 'Green → Blue Stripe',
+    baseColor: _green,
+    stripeColor: _blue,
+    requirements: [
+      'Tul: Yul-Gok (38 movements)',
+      'Palkup taerigi (elbow strike), dwijibo jirugi',
+      'Dwit Chagi (back piercing kick) — both legs',
+      '2-step sparring full set + free sparring intro',
+      'Theory: meaning of Yul-Gok (Yi I, "Confucius of Korea")',
+    ],
+  ),
+  BeltLevel(
+    id: '4gup',
+    gup: '4 GUP',
+    name: 'Blue',
+    baseColor: _blue,
+    requirements: [
+      'Tul: Joong-Gun (32 movements)',
+      'Kyocha sogi (X-stance), sang palmok makgi',
+      'Bandae Dollyo Chagi (reverse turning kick)',
+      '1-step sparring (Ilbo Matsogi) #1–3',
+      'Theory: meaning of Joong-Gun (Ahn Joong-Gun)',
+    ],
+  ),
+  BeltLevel(
+    id: '3gup',
+    gup: '3 GUP',
+    name: 'Blue → Red Stripe',
+    baseColor: _blue,
+    stripeColor: _red,
+    requirements: [
+      'Tul: Toi-Gye (37 movements)',
+      'W-shape block (san makgi) in annun sogi',
+      'Twimyo Yop Chagi (flying side kick)',
+      '1-step sparring full set + free sparring 2×2 min',
+      'Theory: meaning of Toi-Gye (Yi Hwang)',
+    ],
+  ),
+  BeltLevel(
+    id: '2gup',
+    gup: '2 GUP',
+    name: 'Red',
+    baseColor: _red,
+    requirements: [
+      'Tul: Hwa-Rang (29 movements)',
+      'Combination kicking: dollyo + bandae dollyo chagi',
+      'Twimyo Dollyo Chagi (flying turning kick)',
+      'Free sparring 2×2 min + self-defence (hosinsul) basics',
+      'Theory: meaning of Hwa-Rang, red belt symbolism',
+    ],
+  ),
+  BeltLevel(
+    id: '1gup',
+    gup: '1 GUP',
+    name: 'Red → Black Stripe',
+    baseColor: _red,
+    stripeColor: _black,
+    requirements: [
+      'Tul: Choong-Moo (30 movements)',
+      'All previous patterns on demand',
+      'Twimyo Bandae Dollyo Chagi (flying reverse turning kick)',
+      'Free sparring vs two opponents + breaking (kyokpa)',
+      'Theory: meaning of Choong-Moo (Admiral Yi Sun-Sin), full terminology',
+    ],
+  ),
+];

lib/data/services/llm_client.dart

@@ -72,6 +72,8 @@ class LlmClient {
       AiProvider.openai => 'https://api.openai.com/v1/chat/completions',
       AiProvider.gemini =>
         'https://generativelanguage.googleapis.com/v1beta/openai/chat/completions',
+      AiProvider.openrouter =>
+        'https://openrouter.ai/api/v1/chat/completions',
       AiProvider.anthropic => throw StateError('handled separately'),
     };
 

lib/injection.dart

@@ -20,6 +20,7 @@ import 'package:trainhub_flutter/domain/repositories/note_repository.dart';
 import 'package:trainhub_flutter/data/services/ai_process_manager.dart';
 import 'package:trainhub_flutter/data/services/ai_settings_service.dart';
 import 'package:trainhub_flutter/data/services/combo_service.dart';
+import 'package:trainhub_flutter/data/services/grading_service.dart';
 import 'package:trainhub_flutter/data/services/embedding_service.dart';
 import 'package:trainhub_flutter/data/services/llm_client.dart';
 import 'package:trainhub_flutter/data/database/daos/knowledge_chunk_dao.dart';
@@ -50,6 +51,7 @@ void init() {
   getIt.registerSingleton<EmbeddingService>(EmbeddingService());
   getIt.registerSingleton<AiSettingsService>(AiSettingsService());
   getIt.registerSingleton<ComboService>(ComboService());
+  getIt.registerSingleton<GradingService>(GradingService());
   getIt.registerSingleton<LlmClient>(LlmClient(getIt<AiSettingsService>()));
 
   // Repositories

lib/presentation/chat/chat_controller.dart

@@ -1,6 +1,10 @@
+import 'dart:convert';
+
 import 'package:dio/dio.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 import 'package:trainhub_flutter/core/constants/ai_constants.dart';
+import 'package:trainhub_flutter/domain/entities/training_exercise.dart';
+import 'package:trainhub_flutter/domain/entities/training_section.dart';
 import 'package:trainhub_flutter/domain/repositories/chat_repository.dart';
 import 'package:trainhub_flutter/domain/repositories/exercise_repository.dart';
 import 'package:trainhub_flutter/domain/repositories/note_repository.dart';
@@ -206,6 +210,71 @@ class ChatController extends _$ChatController {
   /// kept and persisted like a normal reply.
   void stopGeneration() => _cancelToken?.cancel();
 
+  /// Turns an assistant reply describing a workout into a real training plan
+  /// in the database. The model re-reads its own text and emits strict JSON,
+  /// which is parsed into sections/exercises. Returns the created plan name.
+  Future<String> createPlanFromText(String content) async {
+    const extractPrompt =
+        'You convert workout descriptions into strict JSON. '
+        'Respond with ONLY valid JSON — no markdown fences, no commentary. '
+        'Schema: {"name": string, "sections": [{"name": string, '
+        '"exercises": [{"name": string, "sets": int, "value": int, '
+        '"isTime": bool, "rest": int}]}]}. '
+        '"value" means repetitions when isTime=false, or seconds when '
+        'isTime=true. "rest" is rest between sets in seconds. '
+        'Keep exercise names short. If the text contains no workout plan, '
+        'respond with {"name": "", "sections": []}.';
+
+    final buffer = StringBuffer();
+    await for (final delta in _llm.streamChat([
+      {'role': 'system', 'content': extractPrompt},
+      {'role': 'user', 'content': content},
+    ])) {
+      buffer.write(delta);
+    }
+
+    final raw = buffer.toString();
+    final start = raw.indexOf('{');
+    final end = raw.lastIndexOf('}');
+    if (start < 0 || end <= start) {
+      throw Exception('The model did not return a valid plan.');
+    }
+    final data =
+        jsonDecode(raw.substring(start, end + 1)) as Map<String, dynamic>;
+    final sectionsJson = (data['sections'] as List?) ?? [];
+    if (sectionsJson.isEmpty) {
+      throw Exception('No workout plan found in this reply.');
+    }
+
+    final sections = <TrainingSectionEntity>[
+      for (final s in sectionsJson)
+        TrainingSectionEntity(
+          id: const Uuid().v4(),
+          name: (s['name'] ?? 'Section') as String,
+          exercises: [
+            for (final e in (s['exercises'] as List? ?? []))
+              TrainingExerciseEntity(
+                instanceId: const Uuid().v4(),
+                exerciseId: '',
+                name: (e['name'] ?? 'Exercise') as String,
+                sets: (e['sets'] as num?)?.toInt() ?? 3,
+                value: (e['value'] as num?)?.toInt() ?? 10,
+                isTime: (e['isTime'] as bool?) ?? false,
+                rest: (e['rest'] as num?)?.toInt() ?? 60,
+              ),
+          ],
+        ),
+    ];
+
+    final planRepo = getIt<TrainingPlanRepository>();
+    final name = ((data['name'] as String?)?.trim().isEmpty ?? true)
+        ? 'AI Plan'
+        : (data['name'] as String).trim();
+    final created = await planRepo.create(name);
+    await planRepo.update(created.copyWith(sections: sections));
+    return name;
+  }
+
   Future<String> _streamResponse(
     String systemPrompt,
     List<Map<String, String>> history,

lib/presentation/chat/chat_controller.g.dart

@@ -41,7 +41,7 @@ final aiSettingsServiceProvider =
 @Deprecated('Will be removed in 3.0. Use Ref instead')
 // ignore: unused_element
 typedef AiSettingsServiceRef = AutoDisposeProviderRef<AiSettingsService>;
-String _$chatControllerHash() => r'227ef80f7bcc8787d85a726f151d878a3ba954d6';
+String _$chatControllerHash() => r'3856f4ae716d8ea0fab459f0b8182bc76e9f1e1b';
 
 /// See also [ChatController].
 @ProviderFor(ChatController)

lib/presentation/chat/chat_page.dart

@@ -58,6 +58,37 @@ class _ChatPageState extends ConsumerState<ChatPage> {
     _inputFocusNode.requestFocus();
   }
 
+  Future<void> _createPlanFromMessage(
+    ChatController controller,
+    String content,
+  ) async {
+    // Simple progress dialog — extraction is a second LLM round-trip.
+    showDialog<void>(
+      context: context,
+      barrierDismissible: false,
+      builder: (_) => const Center(child: CircularProgressIndicator()),
+    );
+    try {
+      final name = await controller.createPlanFromText(content);
+      if (!mounted) return;
+      Navigator.of(context, rootNavigator: true).pop();
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('Plan "$name" created — find it under Trainings.'),
+        ),
+      );
+    } catch (e) {
+      if (!mounted) return;
+      Navigator.of(context, rootNavigator: true).pop();
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('Could not create a plan: $e'),
+          backgroundColor: AppColors.surfaceContainerHigh,
+        ),
+      );
+    }
+  }
+
   String _formatTimestamp(String timestamp) {
     try {
       final dt = DateTime.parse(timestamp);
@@ -306,6 +337,9 @@ class _ChatPageState extends ConsumerState<ChatPage> {
                   return MessageBubble(
                     message: msg,
                     formattedTime: _formatTimestamp(msg.createdAt),
+                    onCreatePlan: msg.isUser
+                        ? null
+                        : () => _createPlanFromMessage(controller, msg.content),
                   );
                 },
               );

lib/presentation/chat/widgets/message_bubble.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
+import 'package:google_fonts/google_fonts.dart';
 import 'package:trainhub_flutter/core/constants/ui_constants.dart';
 import 'package:trainhub_flutter/core/theme/app_colors.dart';
 import 'package:trainhub_flutter/domain/entities/chat_message.dart';
@@ -9,11 +10,16 @@ class MessageBubble extends StatelessWidget {
     super.key,
     required this.message,
     required this.formattedTime,
+    this.onCreatePlan,
   });
 
   final ChatMessageEntity message;
   final String formattedTime;
 
+  /// When set (assistant messages), shows a "create plan" action that turns
+  /// the reply into a real training plan.
+  final VoidCallback? onCreatePlan;
+
   @override
   Widget build(BuildContext context) {
     final isUser = message.isUser;
@@ -21,8 +27,9 @@ class MessageBubble extends StatelessWidget {
     return Padding(
       padding: const EdgeInsets.only(bottom: UIConstants.spacing12),
       child: Row(
-        mainAxisAlignment:
-            isUser ? MainAxisAlignment.end : MainAxisAlignment.start,
+        mainAxisAlignment: isUser
+            ? MainAxisAlignment.end
+            : MainAxisAlignment.start,
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           if (!isUser) ...[
@@ -34,8 +41,9 @@ class MessageBubble extends StatelessWidget {
           ],
           Flexible(
             child: Column(
-              crossAxisAlignment:
-                  isUser ? CrossAxisAlignment.end : CrossAxisAlignment.start,
+              crossAxisAlignment: isUser
+                  ? CrossAxisAlignment.end
+                  : CrossAxisAlignment.start,
               children: [
                 Container(
                   constraints: BoxConstraints(maxWidth: maxWidth),
@@ -84,13 +92,51 @@ class MessageBubble extends StatelessWidget {
                 const SizedBox(height: 4),
                 Padding(
                   padding: const EdgeInsets.symmetric(horizontal: 4),
-                  child: Text(
+                  child: Row(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      Text(
                         formattedTime,
                         style: const TextStyle(
                           color: AppColors.textMuted,
                           fontSize: 11,
                         ),
                       ),
+                      if (!isUser && onCreatePlan != null) ...[
+                        const SizedBox(width: UIConstants.spacing12),
+                        InkWell(
+                          onTap: onCreatePlan,
+                          borderRadius: BorderRadius.circular(4),
+                          child: Padding(
+                            padding: const EdgeInsets.symmetric(
+                              horizontal: 4,
+                              vertical: 2,
+                            ),
+                            child: Row(
+                              mainAxisSize: MainAxisSize.min,
+                              children: [
+                                const Icon(
+                                  Icons.playlist_add_rounded,
+                                  size: 13,
+                                  color: AppColors.accent,
+                                ),
+                                const SizedBox(width: 4),
+                                Text(
+                                  'CREATE PLAN',
+                                  style: GoogleFonts.jetBrainsMono(
+                                    fontSize: 9,
+                                    fontWeight: FontWeight.w600,
+                                    letterSpacing: 0.8,
+                                    color: AppColors.accent,
+                                  ),
+                                ),
+                              ],
+                            ),
+                          ),
+                        ),
+                      ],
+                    ],
+                  ),
                 ),
               ],
             ),

lib/presentation/common/widgets/node_graph_canvas.dart

@@ -33,7 +33,7 @@ class GraphEdgeData {
 ///
 /// Interactions:
 /// - drag empty space to pan, pinch / scroll to zoom
-/// - drag a node to move it ([onNodeMoved] per frame, [onNodeDragEnd] once)
+/// - drag a node to move it ([onNodeMoved] fires once, at drag end)
 /// - tap the link button on a node, then tap another node to connect them
 ///   ([onConnect]); connecting an already-linked pair is the caller's chance
 ///   to toggle the edge off
@@ -44,7 +44,6 @@ class NodeGraphCanvas extends StatefulWidget {
     required this.nodes,
     required this.edges,
     this.onNodeMoved,
-    this.onNodeDragEnd,
     this.onConnect,
     this.onNodeTap,
     this.onNodeLongPress,
@@ -53,8 +52,11 @@ class NodeGraphCanvas extends StatefulWidget {
 
   final List<GraphNodeData> nodes;
   final List<GraphEdgeData> edges;
+
+  /// Called once, when a drag ends, with the final position. During the
+  /// drag the canvas tracks positions locally so no parent rebuild (or
+  /// persistence) happens per pointer event — that's what keeps it smooth.
   final void Function(String id, Offset position)? onNodeMoved;
-  final void Function(String id)? onNodeDragEnd;
   final void Function(String fromId, String toId)? onConnect;
   final void Function(String id)? onNodeTap;
   final void Function(String id)? onNodeLongPress;
@@ -76,6 +78,27 @@ class _NodeGraphCanvasState extends State<NodeGraphCanvas> {
   /// this is what makes node dragging feel 1:1 with the mouse.
   String? _draggingId;
 
+  /// Live positions — the canvas is the source of truth while dragging,
+  /// so a drag never triggers a parent rebuild per pointer event.
+  late Map<String, Offset> _positions;
+
+  @override
+  void initState() {
+    super.initState();
+    _positions = {for (final n in widget.nodes) n.id: n.position};
+  }
+
+  @override
+  void didUpdateWidget(NodeGraphCanvas oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    // Re-sync from the parent, but never yank the node under the cursor.
+    final dragging = _draggingId;
+    _positions = {
+      for (final n in widget.nodes)
+        n.id: n.id == dragging ? (_positions[n.id] ?? n.position) : n.position,
+    };
+  }
+
   @override
   void dispose() {
     _transform.dispose();
@@ -116,18 +139,25 @@ class _NodeGraphCanvasState extends State<NodeGraphCanvas> {
               height: widget.canvasSize.height,
               child: Stack(
                 children: [
+                  // Static dot grid — painted once, never repaints on drag.
+                  Positioned.fill(
+                    child: RepaintBoundary(
+                      child: CustomPaint(painter: _DotGridPainter()),
+                    ),
+                  ),
                   Positioned.fill(
                     child: CustomPaint(
-                      painter: _GraphPainter(
+                      painter: _EdgesPainter(
                         nodesById: nodesById,
+                        positions: _positions,
                         edges: widget.edges,
                       ),
                     ),
                   ),
                   for (final node in widget.nodes)
                     Positioned(
-                      left: node.position.dx,
-                      top: node.position.dy,
+                      left: (_positions[node.id] ?? node.position).dx,
+                      top: (_positions[node.id] ?? node.position).dy,
                       // Raw pointer events instead of a pan GestureDetector:
                       // no gesture-arena delay, no drag slop — the node
                       // follows the cursor from the first pixel.
@@ -139,15 +169,19 @@ class _NodeGraphCanvasState extends State<NodeGraphCanvas> {
                             ? null
                             : (event) {
                                 if (_draggingId != node.id) return;
-                                widget.onNodeMoved!(
-                                  node.id,
-                                  node.position + event.delta / _scale,
-                                );
+                                setState(() {
+                                  _positions[node.id] =
+                                      (_positions[node.id] ?? node.position) +
+                                      event.delta / _scale;
+                                });
                               },
                         onPointerUp: (_) {
                           if (_draggingId == node.id) {
                             setState(() => _draggingId = null);
-                            widget.onNodeDragEnd?.call(node.id);
+                            widget.onNodeMoved?.call(
+                              node.id,
+                              _positions[node.id] ?? node.position,
+                            );
                           }
                         },
                         onPointerCancel: (_) {
@@ -155,6 +189,7 @@ class _NodeGraphCanvasState extends State<NodeGraphCanvas> {
                             setState(() => _draggingId = null);
                           }
                         },
+                        child: RepaintBoundary(
                           child: _NodeCard(
                             node: node,
                             isConnectSource: _connectingFrom == node.id,
@@ -172,6 +207,7 @@ class _NodeGraphCanvasState extends State<NodeGraphCanvas> {
                           ),
                         ),
                       ),
+                    ),
                 ],
               ),
             ),
@@ -326,19 +362,45 @@ class _NodeCard extends StatelessWidget {
 }
 
 // ---------------------------------------------------------------------------
-// Edges + dot grid painter
+// Painters — the static dot grid is separate from the edges so that a node
+// drag only repaints the (cheap) edge layer, never the thousands of dots.
 // ---------------------------------------------------------------------------
 
-class _GraphPainter extends CustomPainter {
-  _GraphPainter({required this.nodesById, required this.edges});
+class _DotGridPainter extends CustomPainter {
+  @override
+  void paint(Canvas canvas, Size size) {
+    const step = 28.0;
+    final points = <Offset>[
+      for (double x = step; x < size.width; x += step)
+        for (double y = step; y < size.height; y += step) Offset(x, y),
+    ];
+    canvas.drawPoints(
+      PointMode.points,
+      points,
+      Paint()
+        ..color = AppColors.surfaceContainerHigh
+        ..strokeWidth = 1.6
+        ..strokeCap = StrokeCap.round,
+    );
+  }
+
+  @override
+  bool shouldRepaint(_DotGridPainter oldDelegate) => false;
+}
+
+class _EdgesPainter extends CustomPainter {
+  _EdgesPainter({
+    required this.nodesById,
+    required this.positions,
+    required this.edges,
+  });
 
   final Map<String, GraphNodeData> nodesById;
+  final Map<String, Offset> positions;
   final List<GraphEdgeData> edges;
 
   @override
   void paint(Canvas canvas, Size size) {
-    _paintDotGrid(canvas, size);
-
     final edgePaint = Paint()
       ..style = PaintingStyle.stroke
       ..strokeWidth = 2;
@@ -349,12 +411,14 @@ class _GraphPainter extends CustomPainter {
       if (from == null || to == null) continue;
 
       final start =
-          from.position +
+          (positions[edge.fromId] ?? from.position) +
           const Offset(
             NodeGraphCanvas.nodeWidth,
             NodeGraphCanvas.nodeHeight / 2,
           );
-      final end = to.position + const Offset(0, NodeGraphCanvas.nodeHeight / 2);
+      final end =
+          (positions[edge.toId] ?? to.position) +
+          const Offset(0, NodeGraphCanvas.nodeHeight / 2);
 
       edgePaint.color = from.accent.withValues(alpha: 0.75);
 
@@ -384,22 +448,6 @@ class _GraphPainter extends CustomPainter {
     }
   }
 
-  void _paintDotGrid(Canvas canvas, Size size) {
-    const step = 28.0;
-    final points = <Offset>[
-      for (double x = step; x < size.width; x += step)
-        for (double y = step; y < size.height; y += step) Offset(x, y),
-    ];
-    canvas.drawPoints(
-      PointMode.points,
-      points,
-      Paint()
-        ..color = AppColors.surfaceContainerHigh
-        ..strokeWidth = 1.6
-        ..strokeCap = StrokeCap.round,
-    );
-  }
-
   @override
-  bool shouldRepaint(_GraphPainter oldDelegate) => true;
+  bool shouldRepaint(_EdgesPainter oldDelegate) => true;
 }

lib/presentation/grading/grading_page.dart

@@ -0,0 +1,320 @@
+import 'package:auto_route/auto_route.dart';
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+import 'package:trainhub_flutter/core/constants/ui_constants.dart';
+import 'package:trainhub_flutter/core/theme/app_colors.dart';
+import 'package:trainhub_flutter/data/services/grading_service.dart';
+import 'package:trainhub_flutter/injection.dart';
+
+/// Belt grading preparation: the ITF colored-belt syllabus as a checklist.
+/// Pick the belt you're testing for, tick off requirements as they're ready.
+@RoutePage()
+class GradingPage extends StatefulWidget {
+  const GradingPage({super.key});
+
+  @override
+  State<GradingPage> createState() => _GradingPageState();
+}
+
+class _GradingPageState extends State<GradingPage> {
+  late final GradingService _service = getIt<GradingService>();
+
+  @override
+  void initState() {
+    super.initState();
+    _service.addListener(_onChanged);
+    _service.ensureLoaded();
+  }
+
+  @override
+  void dispose() {
+    _service.removeListener(_onChanged);
+    super.dispose();
+  }
+
+  void _onChanged() {
+    if (mounted) setState(() {});
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final currentId = _service.currentBeltId;
+    final current = kBeltSyllabus.where((b) => b.id == currentId).firstOrNull;
+
+    return ListView(
+      padding: const EdgeInsets.all(UIConstants.pagePadding),
+      children: [
+        Text(
+          'GRADING PREP',
+          style: GoogleFonts.chakraPetch(
+            fontSize: 22,
+            fontWeight: FontWeight.w700,
+            letterSpacing: 1,
+            color: AppColors.textPrimary,
+          ),
+        ),
+        const SizedBox(height: UIConstants.spacing4),
+        Text(
+          current == null
+              ? 'Tap a belt and set it as your current goal.'
+              : 'Preparing for ${current.gup} · ${current.name}',
+          style: GoogleFonts.inter(
+            fontSize: 13,
+            color: AppColors.textSecondary,
+          ),
+        ),
+        if (current != null) ...[
+          const SizedBox(height: UIConstants.spacing16),
+          _ReadinessBanner(belt: current, service: _service),
+        ],
+        const SizedBox(height: UIConstants.spacing24),
+        for (final belt in kBeltSyllabus) ...[
+          _BeltCard(
+            belt: belt,
+            service: _service,
+            isCurrent: belt.id == currentId,
+          ),
+          const SizedBox(height: UIConstants.spacing12),
+        ],
+      ],
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Readiness banner for the current belt
+// ---------------------------------------------------------------------------
+
+class _ReadinessBanner extends StatelessWidget {
+  const _ReadinessBanner({required this.belt, required this.service});
+
+  final BeltLevel belt;
+  final GradingService service;
+
+  @override
+  Widget build(BuildContext context) {
+    final progress = service.progress(belt);
+    final percent = (progress * 100).round();
+    final ready = progress >= 1.0;
+
+    return Container(
+      padding: const EdgeInsets.all(UIConstants.cardPadding),
+      decoration: BoxDecoration(
+        color: AppColors.surfaceContainer,
+        borderRadius: UIConstants.cardBorderRadius,
+        border: Border.all(
+          color: ready ? AppColors.success : AppColors.accentBorder,
+        ),
+      ),
+      child: Row(
+        children: [
+          _BeltChip(belt: belt, size: 40),
+          const SizedBox(width: UIConstants.spacing16),
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  ready ? 'READY FOR GRADING' : 'GRADING READINESS',
+                  style: GoogleFonts.jetBrainsMono(
+                    fontSize: 10,
+                    fontWeight: FontWeight.w600,
+                    letterSpacing: 1.5,
+                    color: ready ? AppColors.success : AppColors.accent,
+                  ),
+                ),
+                const SizedBox(height: 8),
+                ClipRRect(
+                  borderRadius: BorderRadius.circular(3),
+                  child: LinearProgressIndicator(
+                    value: progress,
+                    minHeight: 6,
+                    backgroundColor: AppColors.surfaceContainerHigh,
+                    valueColor: AlwaysStoppedAnimation<Color>(
+                      ready ? AppColors.success : AppColors.accent,
+                    ),
+                  ),
+                ),
+              ],
+            ),
+          ),
+          const SizedBox(width: UIConstants.spacing16),
+          Text(
+            '$percent%',
+            style: GoogleFonts.jetBrainsMono(
+              fontSize: 22,
+              fontWeight: FontWeight.w700,
+              color: ready ? AppColors.success : AppColors.textPrimary,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Belt card with expandable requirement checklist
+// ---------------------------------------------------------------------------
+
+class _BeltCard extends StatelessWidget {
+  const _BeltCard({
+    required this.belt,
+    required this.service,
+    required this.isCurrent,
+  });
+
+  final BeltLevel belt;
+  final GradingService service;
+  final bool isCurrent;
+
+  @override
+  Widget build(BuildContext context) {
+    final checked = service.checkedCount(belt.id);
+    final total = belt.requirements.length;
+
+    return Container(
+      decoration: BoxDecoration(
+        color: AppColors.surfaceContainer,
+        borderRadius: UIConstants.cardBorderRadius,
+        border: Border.all(
+          color: isCurrent ? AppColors.accentBorder : AppColors.border,
+        ),
+      ),
+      child: Theme(
+        // Remove the ExpansionTile divider lines.
+        data: Theme.of(context).copyWith(dividerColor: Colors.transparent),
+        child: ExpansionTile(
+          initiallyExpanded: isCurrent,
+          tilePadding: const EdgeInsets.symmetric(
+            horizontal: UIConstants.spacing16,
+            vertical: 4,
+          ),
+          leading: _BeltChip(belt: belt, size: 34),
+          title: Row(
+            children: [
+              Text(
+                belt.gup,
+                style: GoogleFonts.chakraPetch(
+                  fontSize: 14,
+                  fontWeight: FontWeight.w700,
+                  letterSpacing: 0.8,
+                  color: AppColors.textPrimary,
+                ),
+              ),
+              const SizedBox(width: UIConstants.spacing12),
+              Expanded(
+                child: Text(
+                  belt.name,
+                  style: GoogleFonts.inter(
+                    fontSize: 12,
+                    color: AppColors.textSecondary,
+                  ),
+                ),
+              ),
+              if (isCurrent)
+                Container(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 8,
+                    vertical: 3,
+                  ),
+                  decoration: BoxDecoration(
+                    color: AppColors.accentMuted,
+                    borderRadius: BorderRadius.circular(10),
+                    border: Border.all(color: AppColors.accentBorder),
+                  ),
+                  child: Text(
+                    'CURRENT',
+                    style: GoogleFonts.jetBrainsMono(
+                      fontSize: 8,
+                      fontWeight: FontWeight.w700,
+                      letterSpacing: 1,
+                      color: AppColors.accent,
+                    ),
+                  ),
+                ),
+            ],
+          ),
+          subtitle: Padding(
+            padding: const EdgeInsets.only(top: 4),
+            child: Text(
+              '$checked / $total requirements',
+              style: GoogleFonts.jetBrainsMono(
+                fontSize: 10,
+                color: checked == total
+                    ? AppColors.success
+                    : AppColors.textMuted,
+              ),
+            ),
+          ),
+          children: [
+            for (var i = 0; i < belt.requirements.length; i++)
+              CheckboxListTile(
+                dense: true,
+                controlAffinity: ListTileControlAffinity.leading,
+                contentPadding: const EdgeInsets.symmetric(
+                  horizontal: UIConstants.spacing16,
+                ),
+                value: service.isChecked(belt.id, i),
+                onChanged: (_) => service.toggle(belt.id, i),
+                title: Text(
+                  belt.requirements[i],
+                  style: GoogleFonts.inter(
+                    fontSize: 13,
+                    color: service.isChecked(belt.id, i)
+                        ? AppColors.textMuted
+                        : AppColors.textPrimary,
+                    decoration: service.isChecked(belt.id, i)
+                        ? TextDecoration.lineThrough
+                        : null,
+                  ),
+                ),
+              ),
+            Padding(
+              padding: const EdgeInsets.fromLTRB(16, 4, 16, 12),
+              child: Align(
+                alignment: Alignment.centerLeft,
+                child: OutlinedButton(
+                  onPressed: () =>
+                      service.setCurrentBelt(isCurrent ? null : belt.id),
+                  child: Text(
+                    isCurrent ? 'UNSET CURRENT' : 'SET AS CURRENT GOAL',
+                  ),
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Belt color chip
+// ---------------------------------------------------------------------------
+
+class _BeltChip extends StatelessWidget {
+  const _BeltChip({required this.belt, required this.size});
+
+  final BeltLevel belt;
+  final double size;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      width: size,
+      height: size * 0.55,
+      decoration: BoxDecoration(
+        color: belt.baseColor,
+        borderRadius: BorderRadius.circular(4),
+        border: Border.all(color: AppColors.border),
+      ),
+      child: belt.stripeColor == null
+          ? null
+          : Center(
+              child: Container(height: size * 0.14, color: belt.stripeColor),
+            ),
+    );
+  }
+}

lib/presentation/shell/shell_page.dart

@@ -20,6 +20,7 @@ class ShellPage extends StatelessWidget {
         TrainingsRoute(),
         AnalysisRoute(),
         CalendarRoute(),
+        GradingRoute(),
         ChatRoute(),
       ],
       builder: (context, child) {
@@ -86,6 +87,11 @@ class _Sidebar extends StatelessWidget {
       activeIcon: Icons.calendar_today,
       label: 'Calendar',
     ),
+    _NavItemData(
+      icon: Icons.military_tech_outlined,
+      activeIcon: Icons.military_tech,
+      label: 'Grading',
+    ),
     _NavItemData(
       icon: Icons.chat_bubble_outline,
       activeIcon: Icons.chat_bubble,

lib/presentation/trainings/widgets/combo_builder_tab.dart

@@ -95,6 +95,8 @@ class _ComboBuilderTabState extends State<ComboBuilderTab> {
     _service.update(combo.copyWith(edges: edges));
   }
 
+  // Called once, when a drag ends — the canvas tracks positions itself
+  // during the drag, so this can persist immediately.
   void _moveNode(Combo combo, String id, Offset position) {
     _service.update(
       combo.copyWith(
@@ -103,7 +105,6 @@ class _ComboBuilderTabState extends State<ComboBuilderTab> {
             n.id == id ? n.copyWith(dx: position.dx, dy: position.dy) : n,
         ],
       ),
-      persist: false,
     );
   }
 
@@ -205,7 +206,6 @@ class _ComboBuilderTabState extends State<ComboBuilderTab> {
                               GraphEdgeData(e.fromId, e.toId),
                           ],
                           onNodeMoved: (id, pos) => _moveNode(combo, id, pos),
-                          onNodeDragEnd: (_) => _service.persistNow(),
                           onConnect: (from, to) => _toggleEdge(combo, from, to),
                           onNodeLongPress: (id) => _deleteNode(combo, id),
                         ),