feat(import): add CCBA statement CSV workflow

app/import/page.tsx

@@ -0,0 +1,41 @@
+import { redirect } from "next/navigation"
+import { auth } from "@/lib/auth"
+import { getChannelsAction } from "@/lib/actions/channel"
+import { AppSidebar } from "@/components/app-sidebar"
+import { AppHeader } from "@/components/app-header"
+import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar"
+import { ImportView } from "./import-view"
+
+export default async function ImportPage() {
+  const session = await auth()
+
+  if (!session?.user) {
+    redirect("/login")
+  }
+
+  const user = session.user
+  const userName = user.name || "Fluxent 用户"
+  const userEmail = user.email || ""
+  const userAvatar = user.image || null
+
+  const channelsRes = await getChannelsAction()
+  const channels =
+    channelsRes.success && channelsRes.data ? channelsRes.data : []
+
+  return (
+    <SidebarProvider>
+      <AppSidebar
+        user={{
+          name: userName,
+          email: userEmail,
+          avatar: userAvatar,
+        }}
+      />
+      <SidebarInset>
+        <AppHeader title="导入账单" />
+
+        <ImportView channels={channels} />
+      </SidebarInset>
+    </SidebarProvider>
+  )
+}