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

app/static/js/app.js

@@ -10,6 +10,7 @@ import { initSrs, startSrsTrainingSession, openStatsDashboard } from './modules/
 import { initReader, loadBookshelf, openBook } from './modules/reader.js';
 import { initCefr, loadCefrOverview, startCefrQuiz } from './modules/cefr.js';
 import { initGrammar, loadGrammarUnits, openGrammarUnit } from './modules/grammar.js';
+import { initLessonModule, openLessonConfigurator } from './modules/lesson.js';
 
 let currentUser = null;
 let isRouting = false;
@@ -44,6 +45,7 @@ export function updateActiveNavState(viewName) {
         'reader': 'drawer-nav-reader',
         'cefr': 'drawer-nav-cefr',
         'grammar': 'drawer-nav-grammar',
+        'lesson': 'drawer-nav-lesson',
     };
     const targetId = drawerMap[viewName];
     if (targetId) {
@@ -73,6 +75,8 @@ export function applyInitialViewPreflight() {
                 hash = '#cefr';
             } else if (lastView === 'grammar-view') {
                 hash = '#grammar';
+            } else if (lastView === 'lesson-view') {
+                hash = '#lesson';
             }
         } catch (e) {}
     }
@@ -82,6 +86,8 @@ export function applyInitialViewPreflight() {
     const readerView = document.getElementById('reader-view');
     const cefrView = document.getElementById('cefr-view');
     const grammarView = document.getElementById('grammar-view');
+    const lessonView = document.getElementById('lesson-view');
+    const lessonRunnerView = document.getElementById('lesson-runner-view');
     const bookshelfContainer = document.getElementById('bookshelf-container');
     const readerInterface = document.getElementById('reader-interface');
     const readerBookTitle = document.getElementById('reader-book-title');
@@ -91,6 +97,8 @@ export function applyInitialViewPreflight() {
         if (srsView) srsView.classList.add('hidden');
         if (cefrView) cefrView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
+        if (lessonView) lessonView.classList.add('hidden');
+        if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
         if (readerView) readerView.classList.remove('hidden');
         updateActiveNavState('reader');
         if (hash.includes('/book/')) {
@@ -103,6 +111,8 @@ export function applyInitialViewPreflight() {
         if (readerView) readerView.classList.add('hidden');
         if (cefrView) cefrView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
+        if (lessonView) lessonView.classList.add('hidden');
+        if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
         if (srsView) srsView.classList.remove('hidden');
         updateActiveNavState('srs');
     } else if (hash.startsWith('#cefr')) {
@@ -110,6 +120,8 @@ export function applyInitialViewPreflight() {
         if (readerView) readerView.classList.add('hidden');
         if (srsView) srsView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
+        if (lessonView) lessonView.classList.add('hidden');
+        if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
         if (cefrView) cefrView.classList.remove('hidden');
         updateActiveNavState('cefr');
     } else if (hash.startsWith('#grammar')) {
@@ -117,8 +129,19 @@ export function applyInitialViewPreflight() {
         if (readerView) readerView.classList.add('hidden');
         if (srsView) srsView.classList.add('hidden');
         if (cefrView) cefrView.classList.add('hidden');
+        if (lessonView) lessonView.classList.add('hidden');
+        if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
         if (grammarView) grammarView.classList.remove('hidden');
         updateActiveNavState('grammar');
+    } else if (hash.startsWith('#lesson')) {
+        if (dictionaryView) dictionaryView.classList.add('hidden');
+        if (readerView) readerView.classList.add('hidden');
+        if (srsView) srsView.classList.add('hidden');
+        if (cefrView) cefrView.classList.add('hidden');
+        if (grammarView) grammarView.classList.add('hidden');
+        if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
+        if (lessonView) lessonView.classList.remove('hidden');
+        updateActiveNavState('lesson');
     }
 }
 
@@ -271,6 +294,36 @@ export function openGrammarView(unitId = null, updateHash = true) {
     }
 }
 
+export function openLessonView(presetId = null, updateHash = true) {
+    const targetHash = presetId ? `#lesson/${presetId}` : '#lesson';
+    if (updateHash && !window.location.hash.startsWith('#lesson')) {
+        window.location.hash = targetHash;
+        return;
+    }
+
+    const dictionaryView = document.getElementById('dictionary-view');
+    const srsView = document.getElementById('srs-view');
+    const readerView = document.getElementById('reader-view');
+    const cefrView = document.getElementById('cefr-view');
+    const grammarView = document.getElementById('grammar-view');
+    const lessonView = document.getElementById('lesson-view');
+    const lessonRunnerView = document.getElementById('lesson-runner-view');
+
+    if (dictionaryView) dictionaryView.classList.add('hidden');
+    if (srsView) srsView.classList.add('hidden');
+    if (readerView) readerView.classList.add('hidden');
+    if (cefrView) cefrView.classList.add('hidden');
+    if (grammarView) grammarView.classList.add('hidden');
+    if (lessonRunnerView) lessonRunnerView.classList.add('hidden');
+    if (lessonView) lessonView.classList.remove('hidden');
+
+    updateActiveNavState('lesson');
+    try { localStorage.setItem('notes_active_view', 'lesson-view'); } catch (e) {}
+
+    openLessonConfigurator(presetId);
+}
+
+
 // -----------------------------------------------------------------------
 // Route Handler
 // -----------------------------------------------------------------------
@@ -337,6 +390,10 @@ export async function handleRouting() {
             } else {
                 openBookshelfView(false);
             }
+        } else if (cleanHash.startsWith('lesson')) {
+            const parts = cleanHash.split('/');
+            const presetId = parts[1] || null;
+            openLessonView(presetId, false);
         } else {
             openDictionaryView(false);
         }
@@ -523,6 +580,13 @@ export function initNavigationDrawer() {
             window.location.hash = '#grammar';
         });
     }
+    const drawerNavLesson = document.getElementById('drawer-nav-lesson');
+    if (drawerNavLesson) {
+        drawerNavLesson.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#lesson';
+        });
+    }
     if (drawerNavStats) {
         drawerNavStats.addEventListener('click', () => {
             closeDrawer();
@@ -721,6 +785,7 @@ document.addEventListener('DOMContentLoaded', () => {
     initReader();
     initCefr();
     initGrammar();
+    initLessonModule();
 
     // 5. Global Navigation & Header Actions
     const navBrandHome = document.getElementById('nav-brand-home');