New channel config (#807)

* Channel config rework

Add staged channel config with tabbed UI, import/export workflow, and global form state refactor

* Improve import dialog config comparison and UI labels

* Review fixes

* Improve state handling

* Fix default filter behaviour

---------

Co-authored-by: philon- <philon-@users.noreply.github.com>

packages/web/src/components/Sidebar.tsx

@@ -13,7 +13,6 @@ import { cn } from "@core/utils/cn.ts";
 import { useLocation, useNavigate } from "@tanstack/react-router";
 import {
   CircleChevronLeft,
-  LayersIcon,
   type LucideIcon,
   MapIcon,
   MessageSquareIcon,
@@ -113,11 +112,6 @@ export const Sidebar = ({ children }: SidebarProps) => {
       icon: SettingsIcon,
       page: "config",
     },
-    {
-      name: t("navigation.channels"),
-      icon: LayersIcon,
-      page: "channels",
-    },
     {
       name: `${t("navigation.nodes")} (${displayedNodeCount})`,
       icon: UsersIcon,