fix: handle all status in conversation filters

backend/internal/service/conversation_service.go

@@ -1401,6 +1401,13 @@ func conversationFilterBuildClause(attribute, expression string, expressionArgs
 	if !conversationFilterOperatorAllowed(operator, allowedOperators) {
 		return "", nil, fmt.Errorf("Invalid operator. The allowed operators for %s are [%s].", attribute, strings.Join(allowedOperators, ","))
 	}
+	if attribute == "status" && operator == "equal_to" {
+		for _, value := range values {
+			if strings.EqualFold(strings.TrimSpace(value), "all") {
+				return "1 = 1", append([]any{}, expressionArgs...), nil
+			}
+		}
+	}
 	if operator == "is_present" {
 		return expression + " IS NOT NULL", append([]any{}, expressionArgs...), nil
 	}

backend/internal/service/coverage27_test.go

@@ -592,6 +592,13 @@ func TestConversationFilterBuildClause_EqualTo_Cov27(t *testing.T) {
 	assert.Contains(t, clause, "IN")
 }
 
+func TestConversationFilterBuildClause_AllStatus_Cov27(t *testing.T) {
+	clause, args, err := conversationFilterBuildClause("status", "conversations.status", nil, "equal_to", []string{"open", "all"}, []string{"equal_to"}, false)
+	require.NoError(t, err)
+	assert.Equal(t, "1 = 1", clause)
+	assert.Empty(t, args)
+}
+
 func TestConversationFilterBuildClause_NotEqualTo_Cov27(t *testing.T) {
 	clause, _, err := conversationFilterBuildClause("status", "conversations.status", nil, "not_equal_to", []string{"open"}, []string{"not_equal_to"}, false)
 	require.NoError(t, err)