[IMP] *: remove _render from ir.ui.view

Follow adaptations made in the render api at odoo/odoo#85110

closes odoo/design-themes#554

Related: odoo/enterprise#24622
Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

test_themes/models/ir_qweb.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models
+from odoo.http import request
+
+
+class IrQWeb(models.AbstractModel):
+    _inherit = "ir.qweb"
+
+    def _prepare_frontend_environment(self, values):
+        irQweb = super()._prepare_frontend_environment(values)
+
+        if 'multi_website_websites' in values:
+            websites_themes = self.env['website'].get_test_themes_websites()
+
+            for multi_website_website in values['multi_website_websites']:
+                website_id = multi_website_website['website_id']
+                website = websites_themes.filtered(lambda website: website.id == website_id)
+                theme_img = None
+                if website:
+                    # prefetched by get_test_themes_websites
+                    image_ids = website.theme_id.sudo().image_ids
+                    if image_ids:
+                        theme_img = f"<img src='/web/image/{image_ids[0].id}' width='150'/>"
+                multi_website_website['theme_img'] = theme_img
+
+        return irQweb