Add MCP server (v1 read-only): toggle, per-pane gate, panel UI

src/ipc.ts

@@ -90,3 +90,45 @@ export const deleteHostPassword = (hostId: string): Promise<void> =>
 
 export const hasHostPassword = (hostId: string): Promise<boolean> =>
   invoke("has_host_password", { hostId });
+
+// ---- MCP server -----------------------------------------------------------
+
+export interface McpStatus {
+  running: boolean;
+  url: string | null;
+  token: string | null;
+}
+
+/** Shape of the cached mirror we push to the backend on every workspace
+ *  change. Mirrors src-tauri/src/mcp.rs `McpMirror`. */
+export interface McpMirror {
+  layoutJson: string;
+  /** Only includes leaves with mcpAllow === true. */
+  leaves: Record<string, McpMirroredLeaf>;
+  hosts: McpMirroredHost[];
+}
+
+export interface McpMirroredLeaf {
+  paneId: number | null;
+  label?: string;
+  shellKind: "wsl" | "powershell" | "ssh";
+  distro?: string;
+  sshHostId?: string;
+  broadcast: boolean;
+  active: boolean;
+}
+
+export interface McpMirroredHost {
+  id: string;
+  label: string;
+  hostname: string;
+  user?: string;
+  port?: number;
+  hasPassword: boolean;
+}
+
+export const mcpStart = (): Promise<McpStatus> => invoke("mcp_start");
+export const mcpStop = (): Promise<McpStatus> => invoke("mcp_stop");
+export const mcpStatus = (): Promise<McpStatus> => invoke("mcp_status");
+export const mcpUpdateState = (mirror: McpMirror): Promise<void> =>
+  invoke("mcp_update_state", { mirror });