Add web terminal for remote tablet/phone access to project terminals

Adds an axum HTTP+WebSocket server that runs alongside the Tauri app,
serving a standalone xterm.js-based terminal UI accessible from any
browser on the local network. Shares the existing ExecSessionManager
via Arc-wrapped stores, with token-based authentication and automatic
session cleanup on disconnect.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/lib/tauri-commands.ts

@@ -1,5 +1,5 @@
 import { invoke } from "@tauri-apps/api/core";
-import type { Project, ProjectPath, ContainerInfo, SiblingContainer, AppSettings, UpdateInfo, ImageUpdateInfo, McpServer, FileEntry } from "./types";
+import type { Project, ProjectPath, ContainerInfo, SiblingContainer, AppSettings, UpdateInfo, ImageUpdateInfo, McpServer, FileEntry, WebTerminalInfo } from "./types";
 
 // Docker
 export const checkDocker = () => invoke<boolean>("check_docker");
@@ -88,3 +88,13 @@ export const checkImageUpdate = () =>
 
 // Help
 export const getHelpContent = () => invoke<string>("get_help_content");
+
+// Web Terminal
+export const startWebTerminal = () =>
+  invoke<WebTerminalInfo>("start_web_terminal");
+export const stopWebTerminal = () =>
+  invoke<void>("stop_web_terminal");
+export const getWebTerminalStatus = () =>
+  invoke<WebTerminalInfo>("get_web_terminal_status");
+export const regenerateWebTerminalToken = () =>
+  invoke<WebTerminalInfo>("regenerate_web_terminal_token");