feat: integrate upload-platform v0.2.2 into drhider (v0.0.78)

- Update upload/ module to v0.2.2 with modular Layer 1 (FilePicker) and Layer 2 (Streaming transit upload)
- Replace legacy manual file table in site/templates/index.html with FilePicker.initFilePicker
- Wire uploadViaVM with per-file status updates and abort signal support
- Add dist bundles to dist/ and site/static/dist/ with routes in site/routes/main_bp.py
- Add test_hardening.py and test_safe_name.py from upload-platform
- Bump version to 0.0.78 in site/app.py
- Document integration plan and report in History/upload-integration/

site/routes/main_bp.py

@@ -13,9 +13,9 @@ from flask import Blueprint, render_template, current_app, send_from_directory
 # ═══════════════════════════════════════════════════════════════════════════
 
 # Корень модуля upload/frontend — для раздачи ES-модулей браузеру
-_UPLOAD_FRONTEND_DIR = os.path.join(
-    os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
-    "upload", "frontend")
+_ROOT_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+_UPLOAD_FRONTEND_DIR = os.path.join(_ROOT_DIR, "upload", "frontend")
+_DIST_DIR = os.path.join(_ROOT_DIR, "dist")
 
 main_bp = Blueprint("main", __name__)
 
@@ -34,3 +34,15 @@ def index():
 def upload_frontend(filename):
     """Раздаёт ES-модули переиспользуемого слоя загрузки (upload/frontend)."""
     return send_from_directory(_UPLOAD_FRONTEND_DIR, filename)
+
+
+@main_bp.route("/file-picker/<path:filename>")
+def file_picker_dist(filename):
+    """Отдаёт собранный бандл из каталога dist."""
+    return send_from_directory(_DIST_DIR, filename)
+
+
+@main_bp.route("/dist/<path:filename>")
+def dist_files(filename):
+    """Отдаёт файлы из каталога dist."""
+    return send_from_directory(_DIST_DIR, filename)