Add SSH connections: saved hosts manager and hierarchical shell picker

src/ipc.ts

@@ -3,11 +3,36 @@ import { listen, type UnlistenFn } from "@tauri-apps/api/event";
 
 export type PaneId = number;
 
+/** What to spawn into a fresh PTY. Mirrors the Rust `SpawnSpec` enum. */
+export type SpawnSpec =
+  | { kind: "wsl"; distro?: string; cwd?: string }
+  | { kind: "powershell" }
+  | {
+      kind: "ssh";
+      host: string;
+      user?: string;
+      port?: number;
+      identityFile?: string;
+      jumpHost?: string;
+      extraArgs?: string[];
+    };
+
+/** One saved SSH host. Mirrors the Rust `SshHost` struct. */
+export interface SshHost {
+  id: string;
+  label: string;
+  hostname: string;
+  user?: string;
+  port?: number;
+  identityFile?: string;
+  jumpHost?: string;
+  extraArgs?: string[];
+}
+
 export const listDistros = (): Promise<string[]> => invoke("list_distros");
 
 export const spawnPane = (args: {
-  distro?: string;
-  cwd?: string;
+  spec: SpawnSpec;
   cols: number;
   rows: number;
 }): Promise<PaneId> => invoke("spawn_pane", args);
@@ -38,3 +63,10 @@ export const saveWorkspace = (json: string): Promise<void> =>
 
 export const loadWorkspace = (): Promise<string | null> =>
   invoke("load_workspace");
+
+// ---- SSH hosts -------------------------------------------------------------
+
+export const listSshHosts = (): Promise<SshHost[]> => invoke("list_ssh_hosts");
+
+export const saveSshHosts = (hosts: SshHost[]): Promise<void> =>
+  invoke("save_ssh_hosts", { hosts });