feat: 添加仓库管理页面和 AI 功能，优化路由和导航

- 新增仓库列表页面，支持查看和管理 CNB 仓库
- 添加 AI 代理系统和状态管理
- 新增 tags-input、popover、textarea、tooltip 等 UI 组件
- 更新依赖：@kevisual/cnb 升级至 0.0.22，添加 idb-keyval
- 改进路由守卫：未配置 API Key 时自动跳转配置页
- 优化 Dialog 遮罩层样式和整体布局

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/ui/textarea.tsx

@@ -0,0 +1,18 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "border-input dark:bg-input/30 focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:aria-invalid:border-destructive/50 disabled:bg-input/50 dark:disabled:bg-input/80 rounded-lg border bg-transparent px-2.5 py-2 text-base transition-colors focus-visible:ring-3 aria-invalid:ring-3 md:text-sm placeholder:text-muted-foreground flex field-sizing-content min-h-16 w-full outline-none disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Textarea }