fix(library): tab Workspace affiche le contenu du workspace local actif

- Nouvel endpoint /api/library/local-workspace?workspace_id=X
  interroge local_workspace_items et formate pour la Library
- Nouvel endpoint /api/library/local-workspace-children/{id}
  pour l'expansion d'arborescence des items du workspace local
- Frontend: détecte workspaceId + !isGiteaActive → appelle local-workspace
- Frontend: toggleExpand route vers le bon endpoint selon source_type

app/routers/library.py

@@ -255,6 +255,69 @@ async def library_private(
     return {"items": items}
 
 
+@router.get("/local-workspace-children/{item_id:int}")
+async def library_local_workspace_children(item_id: int, request: Request):
+    """Return children of a local workspace item for tree expansion."""
+    uid = _get_user_id(request)
+    with get_conn() as conn:
+        # Get the item to find its workspace
+        item = conn.execute(
+            "SELECT workspace_id FROM local_workspace_items WHERE id=? AND deleted_at IS NULL",
+            [item_id],
+        ).fetchone()
+        if not item:
+            return {"items": []}
+
+        rows = conn.execute(
+            "SELECT id, name, is_folder, parent_id, content_format, size, "
+            "COALESCE(updated_at, created_at) as updated_at "
+            "FROM local_workspace_items "
+            "WHERE parent_id = ? AND deleted_at IS NULL "
+            "ORDER BY is_folder DESC, name COLLATE NOCASE",
+            [item_id],
+        ).fetchall()
+
+    items = []
+    for r in rows:
+        name = r["name"] or "Untitled"
+        is_folder = bool(r["is_folder"])
+        icon = "📁" if is_folder else "📄"
+        fn = name.lower()
+        if not is_folder:
+            if fn.endswith(".pdf"): icon = "📕"
+            elif any(fn.endswith(e) for e in [".png",".jpg",".jpeg",".gif",".webp",".svg"]): icon = "🖼️"
+            elif any(fn.endswith(e) for e in [".py",".js",".ts",".go",".rs"]): icon = "📜"
+
+        with get_conn() as conn:
+            child_count = conn.execute(
+                "SELECT COUNT(*) FROM local_workspace_items WHERE parent_id=? AND deleted_at IS NULL",
+                [r["id"]],
+            ).fetchone()[0]
+
+        items.append({
+            "id": r["id"],
+            "title": name,
+            "icon": icon,
+            "is_folder": is_folder,
+            "source_type": "local-ws",
+            "source_label": "",
+            "workspace": "",
+            "workspace_name": "",
+            "author": "",
+            "author_initial": "?",
+            "updated_at": r["updated_at"] or "",
+            "visited_at": "",
+            "has_children": child_count > 0,
+            "children": [],
+            "url": f"/local-workspace?folder={r['id']}" if is_folder else f"/pages/{r['id']}",
+            "content_format": r["content_format"] or "file",
+            "favorited": False,
+            "size_display": _format_size(r["size"]) if r["size"] else "",
+        })
+
+    return {"items": items}
+
+
 @router.get("/children/{page_id:int}")
 async def library_children(page_id: int, request: Request):
     """Return child pages for a given parent page (for tree expansion in Library)."""
@@ -295,6 +358,82 @@ async def library_repository(
     return {"items": items}
 
 
+@router.get("/local-workspace")
+async def library_local_workspace(
+    request: Request,
+    workspace_id: int = Query(default=0),
+):
+    """Return local workspace items (files/folders) formatted for Library display."""
+    from app.routers.dashboard import _get_active_workspace
+    uid = _get_user_id(request)
+
+    # Get the active workspace
+    ws = _get_active_workspace(request, user_id=uid)
+    if not ws:
+        return {"items": []}
+
+    ws_id = workspace_id or ws["id"]
+
+    # Query local workspace tree
+    with get_conn() as conn:
+        rows = conn.execute(
+            "SELECT id, name, is_folder, parent_id, content_format, size, "
+            "COALESCE(updated_at, created_at) as updated_at "
+            "FROM local_workspace_items "
+            "WHERE workspace_id = ? AND deleted_at IS NULL "
+            "ORDER BY is_folder DESC, name COLLATE NOCASE",
+            [ws_id],
+        ).fetchall()
+
+    items = []
+    for r in rows:
+        name = r["name"] or "Untitled"
+        is_folder = bool(r["is_folder"])
+        icon = "📁" if is_folder else "📄"
+        fn = name.lower()
+        if not is_folder:
+            if fn.endswith(".pdf"): icon = "📕"
+            elif any(fn.endswith(e) for e in [".png",".jpg",".jpeg",".gif",".webp",".svg"]): icon = "🖼️"
+            elif any(fn.endswith(e) for e in [".py",".js",".ts",".go",".rs"]): icon = "📜"
+
+        # Check for children
+        child_count = conn.execute(
+            "SELECT COUNT(*) FROM local_workspace_items WHERE parent_id=? AND deleted_at IS NULL",
+            [r["id"]],
+        ).fetchone()[0]
+
+        items.append({
+            "id": r["id"],
+            "title": name,
+            "icon": icon,
+            "is_folder": is_folder,
+            "source_type": "local-ws",
+            "source_label": ws.get("name", "Workspace"),
+            "workspace": ws.get("name", ""),
+            "workspace_name": ws.get("name", ""),
+            "author": "",
+            "author_initial": "?",
+            "updated_at": r["updated_at"] or "",
+            "visited_at": "",
+            "has_children": child_count > 0,
+            "children": [],
+            "url": f"/local-workspace?folder={r['id']}" if is_folder else f"/pages/{r['id']}",
+            "content_format": r["content_format"] or "file",
+            "favorited": False,
+            "size_display": _format_size(r["size"]) if r["size"] else "",
+        })
+
+    return {"items": items}
+
+
+def _format_size(size_bytes):
+    if not size_bytes: return ""
+    if size_bytes < 1024: return f"{size_bytes} B"
+    if size_bytes < 1048576: return f"{size_bytes/1024:.1f} KB"
+    if size_bytes < 1073741824: return f"{size_bytes/1048576:.1f} MB"
+    return f"{size_bytes/1073741824:.1f} GB"
+
+
 @router.get("/workspace")
 async def library_workspace(
     request: Request,