feat(lessons): implement comprehensive lesson configurator, session runner and AI debrief (Beta)

app/static/js/modules/api.js

@@ -422,5 +422,57 @@ export const api = {
             if (resp.ok) return await resp.json();
             throw new Error(`Failed to cancel task: ${resp.status}`);
         }
+    },
+
+    // Comprehensive Lessons Configurator & Runner (Beta)
+    lessons: {
+        async getPresets() {
+            const resp = await fetch('/api/lessons/presets');
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to get presets: ${resp.status}`);
+        },
+        async savePreset(payload) {
+            const resp = await fetch('/api/lessons/presets', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify(payload)
+            });
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to save preset: ${resp.status}`);
+        },
+        async deletePreset(presetId) {
+            const resp = await fetch(`/api/lessons/presets/${presetId}`, {
+                method: 'DELETE'
+            });
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to delete preset: ${resp.status}`);
+        },
+        async getGrammarRecommendations() {
+            const resp = await fetch('/api/lessons/grammar-recommendations');
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to get grammar recommendations: ${resp.status}`);
+        },
+        async getArticles(topic = null) {
+            let url = '/api/lessons/articles';
+            if (topic) url += `?topic=${encodeURIComponent(topic)}`;
+            const resp = await fetch(url);
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to get articles: ${resp.status}`);
+        },
+        async submitDebrief(payload) {
+            const resp = await fetch('/api/lessons/debrief', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify(payload)
+            });
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to submit debrief: ${resp.status}`);
+        },
+        async getHistory(limit = 15) {
+            const resp = await fetch(`/api/lessons/history?limit=${limit}`);
+            if (resp.ok) return await resp.json();
+            throw new Error(`Failed to get lesson history: ${resp.status}`);
+        }
     }
 };
+