fix(editeur): #93 garde-fous de session d'edition inline (onglets, ecriture externe) + hooks de versionnage documentes

Une session d'edition inline (Editer/Forge) qui possede la zone de contenu etait detruite par deux chemins qui vident cette zone : activation d'onglet (TabManager.activate, PaneTabManager.activate) -> detachInlineEditor() avant le placeholder ; evenement SSE index_updated -> reloadExternalWrite() recharge le tampon de l'editeur au lieu de re-rendre la vue lecture. Nouveau helper queryEditor() ; closeEditor() remet le conteneur dans la modale avant de restaurer en-tete/pied/marque. docs/CONTRIBUTING.md documente scripts/install-hooks.sh.

frontend/js/sync.js

@@ -6,7 +6,7 @@ import { api, AuthManager } from './auth.js';
 import { loadVaults, loadTags, refreshTagsForContext, refreshSidebarTreePreservingState } from './sidebar.js';
 import { loadRecentFiles, initAboutModal } from './config.js';
 import { openFile } from './viewer.js';
-import { closeEditor } from './utils.js';
+import { closeEditor, reloadExternalWrite } from './utils.js';
 import { initOffline, syncFileIndexFromServer } from './offline.js';
 import { initThemes } from './themes.js';
 
@@ -166,7 +166,11 @@ export const IndexUpdateManager = (() => {
         if (state.currentVault && state.currentPath) {
           const changed = (data.changes || []).some((c) => c.vault === state.currentVault && c.path === state.currentPath);
           if (changed) {
-            openFile(state.currentVault, state.currentPath);
+            // #93 — an inline edition session (or Forge) owns the content area:
+            // re-render the read view below it would destroy the editor mid-
+            // session. Reload the editor buffer from disk instead (same path as
+            // an external AI write).
+            reloadExternalWrite(state.currentVault, state.currentPath);
           }
         }
       } catch (err) {