feat: 10+ améliorations pro — inline rename, raccourcis, métadonnées, badges, etc.

Implémenté depuis la ROADMAP v2.2.0:

A3 Inline rename: double-clic → input inline (Enter/escape/blur).
   Fonctionne sur x-for items et breadcrumb.

A2 Raccourcis clavier: F2=rename l'item survolé, Ctrl+C/V=copy/paste
   items entre dossiers. Layout focusable (tabindex=0, @keydown).

A6 Duplicate: méthode duplicateItem(), crée une copie '(copy)'.

B3 Métadonnées: child_count ajouté dans l'API tree + sidebar data.

B4+D2 Compteur d'enfants: badge '(N)' sur les dossiers dans la page
   workspace ET la sidebar.

B5 Loading skeletons: CSS shimmer animation (.skeleton).

C1 Breadcrumb éditable: double-clic sur un segment → rename.

D1 Indicateur dossier actif: bordure bleue + highlight bg sur
   l'item de la sidebar correspondant au dossier courant.

D4 Scroll into view: auto-scroll smooth vers le dossier actif
   dans la sidebar après chargement.

child_count ajouté à _build_tree_children (dashboard.py) et
_load_workspace_pages/_load_children (board.py).

app/routers/board.py

@@ -179,12 +179,14 @@ def _load_workspace_pages(ws_cookie: str) -> list:
         for r in rows:
             is_folder = r["parent_section"] == "Workspace"
             title = r["title"] or "Untitled"
+            sub_children = _load_children(r["id"])
             items.append({
                 "db_id": r["id"], "name": title,
                 "id": f"page/{r['id']}",
                 "icon": "📁" if is_folder else _file_icon(title, r["content_format"]),
                 "is_folder": is_folder,
-                "children": _load_children(r["id"]),
+                "child_count": len(sub_children),
+                "children": sub_children,
             })
         return items
     except (ValueError, Exception):
@@ -202,12 +204,14 @@ def _load_children(parent_id: int) -> list:
     for r in rows:
         is_folder = r["parent_section"] == "Workspace"
         title = r["title"] or "Untitled"
+        sub_children = _load_children(r["id"])
         children.append({
             "db_id": r["id"], "name": title,
             "id": f"page/{r['id']}",
             "icon": "📁" if is_folder else _file_icon(title, r["content_format"]),
             "is_folder": is_folder,
-            "children": _load_children(r["id"]),
+            "child_count": len(sub_children),
+            "children": sub_children,
         })
     return children
 

app/routers/dashboard.py

@@ -604,6 +604,7 @@ def _build_tree_children(conn, parent_id: int | None, ws_id: int) -> list:
             "content_format": r["content_format"] if not is_folder else None,
             "children": children,
             "has_children": len(children) > 0,
+            "child_count": len(children),
         })
     return tree