[REF] all: pass pre-commit on the whole repo

Needed for the lint job of the CI to go green. Mostly automatic hook
fixes (black, isort, prettier, pyupgrade, autoflake, whitespace). By hand:

- flake8: two unused imports, an ambiguous variable name `l`.
- pylint-odoo mandatory: manifest keys equal to their default value
  (installable, application, data, external_dependencies).
- end-of-file-fixer skips *.patch too, like trailing-whitespace: the
  upstream patches stay as git format-patch wrote them.

No behaviour change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

website_sale_lazy_loading/controllers/website_sale.py

@@ -76,7 +76,7 @@ class WebsiteSaleLazyLoading(WebsiteSale):
         query = urlencode(params, doseq=True)
         if not query:
             return LAZY_LOADING_ROUTE
-        return "%s?%s" % (LAZY_LOADING_ROUTE, query)
+        return f"{LAZY_LOADING_ROUTE}?{query}"
 
     # ------------------------------------------------------------------
     # AJAX endpoint