feat: add evaluation configuration support in lesson content and API

examples/content/traffic_light_arduino.md

@@ -336,3 +336,9 @@ const int
 Serial
 delay
 ---END_KEY_TEXT---
+
+---EVALUATION_CONFIG---
+{
+  "timeout_ms": 10000
+}
+---END_EVALUATION_CONFIG---

frontend/src/lib/types/lesson.ts

@@ -33,4 +33,5 @@ export interface LessonContent {
 	language: string;
 	language_display_name: string;
 	active_tabs: string[];
+	evaluation_config: Record<string, any>;
 }

frontend/src/routes/lesson/[slug]/+page.svelte

@@ -567,7 +567,8 @@
 			}
 
 			if (type === 'velxio:compile_result' && e.data.success) {
-				setTimeout(() => handleVelxioSubmit(), 5000);
+				const timeout = data?.evaluation_config?.timeout_ms ?? 5000;
+				setTimeout(() => handleVelxioSubmit(), timeout);
 			}
 		};
 		window.addEventListener('message', onMessage);

routes/lessons.py

@@ -70,6 +70,15 @@ def api_lesson(filename):
     expected_serial_output = parsed_data.get('expected_serial_output', '')
     expected_wiring = parsed_data.get('expected_wiring', '')
     
+    evaluation_config_raw = parsed_data.get('evaluation_config', '')
+    evaluation_config = {}
+    if evaluation_config_raw:
+        import json
+        try:
+            evaluation_config = json.loads(evaluation_config_raw)
+        except Exception:
+            pass
+
     if not initial_code:
         initial_code = (
             '#include <stdio.h>\n\nint main() {\n'
@@ -119,6 +128,7 @@ def api_lesson(filename):
         'velxio_circuit': velxio_circuit,
         'expected_serial_output': expected_serial_output,
         'expected_wiring': expected_wiring,
+        'evaluation_config': evaluation_config,
         'solution_code': solution_code,
         'solution_circuit': solution_circuit,
         'solution_python': solution_python,

services/lesson_service.py

@@ -340,6 +340,9 @@ def render_markdown_content(file_path):
     expected_wiring, lesson_content = _extract_section(
         lesson_content, '---EXPECTED_WIRING---', '---END_EXPECTED_WIRING---')
 
+    evaluation_config, lesson_content = _extract_section(
+        lesson_content, '---EVALUATION_CONFIG---', '---END_EVALUATION_CONFIG---')
+
     # Just use whichever initial code matched as the generic 'initial_code' for simplicity 
     # if only one type exists, but return all as dictionary values.
     # Typically frontend uses 'initial_code' for legacy. 
@@ -381,6 +384,7 @@ def render_markdown_content(file_path):
         'velxio_circuit': velxio_circuit,
         'expected_serial_output': expected_serial_output,
         'expected_wiring': expected_wiring,
+        'evaluation_config': evaluation_config,
         'active_tabs': active_tabs
     }