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/storybook/.storybook/mocks/app/hooks/use-providers.ts

@@ -0,0 +1,23 @@
+const model_id = "claude-3-7-sonnet"
+
+const provider = {
+  id: "anthropic",
+  models: {
+    [model_id]: {
+      id: model_id,
+      name: "Claude 3.7 Sonnet",
+      cost: { input: 1, output: 1 },
+      variants: { fast: {}, thinking: {} },
+    },
+  },
+}
+
+export function useProviders() {
+  return {
+    all: () => [provider],
+    default: () => ({ anthropic: model_id }),
+    connected: () => [provider],
+    paid: () => [provider],
+    popular: () => [provider],
+  }
+}