feat: convert ssh tunnels into a plugin

src/ui/tests/sidebar/UserProfilePanel.test.tsx

@@ -25,9 +25,6 @@ vi.mock("react-i18next", () => ({
 vi.mock("@/settings/RemoteSyncPanel.tsx", () => ({
   RemoteSyncPanel: () => null,
 }));
-vi.mock("@/user/C2STunnelPresetManager", () => ({
-  C2STunnelPresetManager: () => null,
-}));
 vi.mock("@/i18n/i18n", () => ({
   changeAppLanguage: vi.fn(),
   normalizeLanguageCode: (code: string) => code,

src/ui/tests/sidebar/host-export-payload.test.ts

@@ -12,7 +12,7 @@ const ALL_GROUPS = new Set<FieldGroup>([
   "connection",
   "notes",
   "tags",
-  "tunnels",
+  "proxy",
   "jumpHosts",
   "quickActions",
   "featureFlags",

src/ui/tests/sidebar/rail-items.test.ts

@@ -48,11 +48,11 @@ describe("RAIL_ITEMS", () => {
     // Guards against a destination silently disappearing now that the rail,
     // the settings toggles, the sidebar titles and the mobile bar all read
     // from this one list.
-    // "sftp" moved to the file-manager plugin's own registerRailItem.
+    // "sftp" moved to the file-manager plugin's own registerRailItem, and
+    // "port-forwarding" to the tunnels plugin's.
     expect(RAIL_ITEMS.map((item) => item.id)).toEqual([
       "hosts",
       "credentials",
-      "port-forwarding",
       "termix-id",
       "connections",
       "collab",

src/ui/tests/sidebar/tree/HostItem/HostItem.test.tsx

@@ -60,6 +60,7 @@ const baseHost: Host = {
   enableTerminal: true,
   enableCommandHistory: true,
   enableTunnel: true,
+  enableTmuxMonitor: true,
   enableFileManager: true,
   enableDocker: true,
   enableRdp: true,
@@ -219,16 +220,16 @@ describe("HostItem density parity", () => {
 
   it("learns repeated local actions and preloads the preferred host tool", () => {
     renderHostItem("comfortable");
-    const tunnelButton = screen.getByTitle("Tunnel");
-    fireEvent.click(tunnelButton);
-    fireEvent.click(tunnelButton);
-    fireEvent.click(tunnelButton);
+    const tmuxButton = screen.getByTitle("Tmux Monitor");
+    fireEvent.click(tmuxButton);
+    fireEvent.click(tmuxButton);
+    fireEvent.click(tmuxButton);
 
     const hostRow = screen.getByText("web-01").closest(".cursor-pointer");
     expect(hostRow).toBeTruthy();
     fireEvent.pointerEnter(hostRow!);
 
     expect(preloadTabSurfaceMock).toHaveBeenCalledWith("terminal");
-    expect(preloadTabSurfaceMock).toHaveBeenCalledWith("tunnel");
+    expect(preloadTabSurfaceMock).toHaveBeenCalledWith("tmux_monitor");
   });
 });