fix: edit extras install command and render symlink parent dir

bincio/edit/cli.py

@@ -42,7 +42,7 @@ def edit(
     except ImportError:
         raise click.ClickException(
             "uvicorn is required for the edit server.\n"
-            "Install with: uv add 'bincio[edit]'"
+            "Install with: uv sync --extra edit"
         )
 
     data = _resolve_data_dir(data_dir, config_path)

bincio/render/cli.py

@@ -76,6 +76,7 @@ def _link_data(site: Path, data: Path) -> None:
     merged = data / "_merged"
     target = merged if merged.exists() else data
     public_data = site / "public" / "data"
+    public_data.parent.mkdir(parents=True, exist_ok=True)
     if public_data.is_symlink():
         if public_data.resolve() == target.resolve():
             return  # already correct