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/

upload/backend/upload_refs/__init__.py

@@ -1,20 +1,7 @@
-"""Слой 2 (бэк): переиспользуемый Blueprint закачки через ВМ.
-
-Использование:
-    from upload.backend.upload_refs import create_upload_refs_blueprint
-    app.register_blueprint(create_upload_refs_blueprint(cfg))
-"""
+"""upload_refs — Flask Blueprint для приёма ссылок и pull с ВМ-буфера."""
 
 from .blueprint import create_upload_refs_blueprint
 from .safe_name import safe_name
 from .pull_file import pull_file
-from .config import PULL_RETRIES, PULL_RETRY_DELAY, VM_UPLOAD_PREFIX
 
-__all__ = [
-    "create_upload_refs_blueprint",
-    "safe_name",
-    "pull_file",
-    "PULL_RETRIES",
-    "PULL_RETRY_DELAY",
-    "VM_UPLOAD_PREFIX",
-]
+__all__ = ["create_upload_refs_blueprint", "safe_name", "pull_file"]