feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

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],
+  }
+}