Integrate Obfuscator file picker into Contracts

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

site/routes/pages_bp.py

@@ -9,6 +9,10 @@ _UPLOAD_FRONTEND = os.path.join(
     os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
     "upload", "frontend",
 )
+_FILE_PICKER_DIST = os.path.join(
+    os.path.dirname(os.path.dirname(_UPLOAD_FRONTEND)),
+    "site", "static", "dist",
+)
 
 
 @pages_bp.route("/")
@@ -25,3 +29,9 @@ def architect():
 def upload_frontend(filename):
     """Отдать статику ES-модулей upload/frontend (для клиентского ZIP)."""
     return send_from_directory(_UPLOAD_FRONTEND, filename)
+
+
+@pages_bp.route("/file-picker/<path:filename>")
+def file_picker_bundle(filename):
+    """Отдать собранный picker bundle."""
+    return send_from_directory(_FILE_PICKER_DIST, filename)