fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/core/migration/20260611035744_credential/migration.sql

@@ -0,0 +1,12 @@
+CREATE TABLE `credential` (
+	`id` text PRIMARY KEY,
+	`connector_id` text NOT NULL,
+	`method_id` text NOT NULL,
+	`label` text NOT NULL,
+	`value` text NOT NULL,
+	`active` integer DEFAULT false NOT NULL,
+	`time_created` integer NOT NULL,
+	`time_updated` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `credential_connector_active_idx` ON `credential` (`connector_id`) WHERE "credential"."active" = 1;