feat(ui): badge version visible + FAB AI flottant

frontend/js/bookslm.js

@@ -44,14 +44,17 @@ class BooksLM {
     // Open with animation
     requestAnimationFrame(() => {
       this._panel.classList.add('open');
+      let hidden = false;
       // Apply persisted hidden state (user toggled off in a previous session)
       try {
         const savedHidden = localStorage.getItem('obsigate-bookslm-hidden');
         if (savedHidden === 'true') {
           this._panel.classList.add('hidden');
           this._updateToggleIcon();
+          hidden = true;
         }
       } catch { /* */ }
+      document.dispatchEvent(new CustomEvent(hidden ? 'bookslm:closed' : 'bookslm:opened', { detail: { vault, directory } }));
     });
     this._isOpen = true;
 
@@ -79,6 +82,7 @@ class BooksLM {
     if (!this._panel || !this._isOpen) return;
     this._panel.classList.remove('open');
     this._isOpen = false;
+    document.dispatchEvent(new CustomEvent('bookslm:closed'));
     // Abort any in-flight request
     if (this._abortCtrl) {
       this._abortCtrl.abort();
@@ -102,6 +106,7 @@ class BooksLM {
       localStorage.setItem('obsigate-bookslm-hidden', isHidden ? 'true' : 'false');
     } catch { /* */ }
     this._updateToggleIcon();
+    document.dispatchEvent(new CustomEvent(isHidden ? 'bookslm:closed' : 'bookslm:opened'));
   }
 
   /**