feat: convert ssh tunnels into a plugin

src/ui/shell/CommandPalette.tsx

@@ -19,7 +19,6 @@ import {
   MessagesSquare,
   LifeBuoy,
   Search,
-  Network,
   User,
   KeyRound,
   Layers, // --- tmux-monitor ---
@@ -73,7 +72,6 @@ function getSshActions(host: Host): {
         icon: Layers,
         label: "Tmux Monitor",
       },
-    host.enableTunnel && { type: "tunnel", icon: Network, label: "Tunnels" },
   ].filter(Boolean) as {
     type: TabType;
     icon: React.ElementType;

src/ui/shell/TabContext.tsx

@@ -111,11 +111,7 @@ export function TabProvider({ children }: TabProviderProps) {
   const computeUniqueTitle = useCallback(
     (tabType: Tab["type"], desiredTitle: string | undefined): string => {
       const defaultTitle =
-        tabType === "file_manager"
-          ? t("nav.fileManager")
-          : tabType === "tunnel"
-            ? t("nav.tunnels")
-            : t("nav.terminal");
+        tabType === "file_manager" ? t("nav.fileManager") : t("nav.terminal");
       const baseTitle = (desiredTitle || defaultTitle).trim();
       const match = baseTitle.match(/^(.*) \((\d+)\)$/);
       const root = match ? match[1] : baseTitle;
@@ -180,9 +176,7 @@ export function TabProvider({ children }: TabProviderProps) {
       const id = nextTabId.current++;
       const instanceId = `tab_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
       const needsUniqueTitle =
-        tabData.type === "terminal" ||
-        tabData.type === "file_manager" ||
-        tabData.type === "tunnel";
+        tabData.type === "terminal" || tabData.type === "file_manager";
       const effectiveTitle = needsUniqueTitle
         ? computeUniqueTitle(tabData.type, tabData.title)
         : tabData.type === "tmux_monitor" // --- tmux-monitor ---

src/ui/shell/shell-layout.ts

@@ -19,7 +19,6 @@ import { getTabType } from "./tab-registry";
  * not a meaningful part of an arrangement.
  */
 const CORE_CAPTURABLE = new Set([
-  "tunnel",
   "tmux_monitor",
   "serial",
   "homepage",
@@ -32,7 +31,6 @@ const CORE_CAPTURABLE = new Set([
 
 /** Core types reopened as singletons, with an optional preselected host. */
 const CORE_SINGLETON = new Set([
-  "tunnel",
   "tmux_monitor",
   "homepage",
   "termix-id",

src/ui/shell/tab-registry.ts

@@ -83,11 +83,11 @@ export const useTabTypes = registry.useList;
 export const resetTabTypes = registry.reset;
 
 /** Core tab types that are saved and reopened after login. */
-const CORE_PERSISTENT = new Set(["tunnel"]);
+const CORE_PERSISTENT = new Set<string>();
 /** Core tab types that hold a live session (close confirm, refresh). */
 const CORE_SESSION = new Set(["serial"]);
 /** Core tab types that restore without a host. */
-const CORE_HOSTLESS = new Set(["dashboard", "tunnel"]);
+const CORE_HOSTLESS = new Set(["dashboard"]);
 
 /**
  * A plugin tab type nobody registered right now: its plugin is off, failed or

src/ui/shell/tabUtils.tsx

@@ -4,7 +4,6 @@ import {
   LayoutDashboard,
   LayoutGrid,
   LayoutPanelLeft,
-  Network,
   Server,
   Settings,
   Usb,
@@ -59,11 +58,6 @@ const HomepageCanvas = lazy(() =>
     default: m.HomepageCanvas,
   })),
 );
-const loadTunnelTab = () =>
-  import("@/features/tunnel/TunnelTab").then((m) => ({
-    default: m.TunnelTab,
-  }));
-const TunnelTab = lazy(loadTunnelTab);
 const Serial = lazy(() =>
   import("@/features/serial/Serial").then((m) => ({
     default: m.Serial,
@@ -89,7 +83,6 @@ const SshToolsPanel = lazy(() =>
 );
 const tabSurfaceLoaders: Partial<Record<TabType, () => Promise<unknown>>> = {
   tmux_monitor: loadTmuxMonitor,
-  tunnel: loadTunnelTab,
 };
 
 /** Download a likely next tab without starting a connection or mounting UI. */
@@ -161,8 +154,6 @@ export function tabIcon(type: TabType) {
       return <User className="size-3.5" />;
     case "admin-settings":
       return <Settings className="size-3.5" />;
-    case "tunnel":
-      return <Network className="size-3.5" />;
     // --- tmux-monitor ---
     case "tmux_monitor":
       return <Layers className="size-3.5" />;
@@ -259,7 +250,7 @@ export interface TabRenderContext {
 
 export function renderTabContent(tab: Tab, context: TabRenderContext) {
   const { shell, isVisible = true, isFocusedPane = true, panelProps } = context;
-  const { host, label } = tab;
+  const { host } = tab;
 
   switch (tab.type) {
     case "dashboard":
@@ -276,11 +267,6 @@ export function renderTabContent(tab: Tab, context: TabRenderContext) {
         <LocalTerminal instanceId={tab.instanceId} isVisible={isVisible} />,
       );
 
-    case "tunnel":
-      return withTabSuspense(
-        <TunnelTab label={label} host={host} isVisible={isVisible} />,
-      );
-
     // --- tmux-monitor ---
     case "tmux_monitor":
       return withTabSuspense(