Fix learn dialog rendering, add lab publish/draft toggle, bump to v0.1.2

- learn/index.html: restructured dialogs inside section divs to fix scope
- learn/index.html: edit-article dialogs via flat articles list in modal blocks
- LearnController: sectionChoices for select options; secure article fetching
- ContentService: createArticlePlaced: new section adjacent to anchor section
- lab status: published = student-visible, draft = hidden
- lab toggle: click badge in labs list or button in lab header to switch status
- added badge-btn CSS class, removed inline styles
- removed all th:onclick with expressions → data-modal attributes
- footer v0.1.2

web/src/main/resources/templates/fragments/base.html

@@ -12,6 +12,8 @@
         function toggleTheme(){ var e=document.documentElement; var t=e.getAttribute('data-theme')==='dark'?'light':'dark'; e.setAttribute('data-theme',t); localStorage.setItem('lms-theme',t); }
         function openModal(id){ var d=document.getElementById(id); if(d) d.showModal(); }
         function closeModal(id){ var d=document.getElementById(id); if(d) d.close(); }
+        function openModalData(btn){ openModal(btn.dataset.modal); }
+        function closeModalData(btn){ closeModal(btn.dataset.modal); }
     </script>
 </head>
 <body>
@@ -38,7 +40,7 @@
         <th:block th:replace="${content}" />
     </main>
     <footer class="page-footer">
-        LMS v0.1.1
+        LMS v0.1.2
     </footer>
 </div>
 </body>