Merge remote-tracking branch 'origin/main' into codex/fix-bt-file-selection

# Conflicts:
#	ui/flutter/test/features/tasks/domain/task_record_test.dart

internal/protocol/http/fetcher.go

@@ -448,6 +448,7 @@ func (f *Fetcher) Resolve(req *base.Request, opts *base.Options) error {
 	if file.Name == "" || file.Name == "/" || file.Name == "." {
 		file.Name = httpReq.URL.Hostname()
 	}
+	file.Name = appendFilenameExtension(file.Name, resp.Header.Get("Content-Type"))
 
 	res.Files = append(res.Files, file)
 	f.meta.Res = res