feat(ui): ensure cross-platform one-click setup and default Showcase UI routing

- Add explicit root route (/) in server.py to guarantee Showcase UI is served by default, routing /admin to the Admin Debug Console
- Enhance dynamic Angular dist detection across multiple standard output paths
- Add automated Node.js/npm detection and installation fallbacks to start scripts and installers across macOS, Linux, and Windows
- Automatically build Showcase UI when launching via start.sh, start.bat/start.ps1, or artemis ui if frontend artifacts are missing
- Add Node.js / npm and Showcase UI status inspection rows to artemis doctor
- Support artemis mcp --install for one-click IDE integration and add make build-ui target

artemis/interfaces/cli/commands/init.py

@@ -134,6 +134,33 @@ def init_command() -> None:
     env_path = ROOT_DIR / ".env"
     env_path.write_text("\n".join(env_content), encoding="utf-8")
 
+    # 5. Configure MCP for AI IDEs
+    console.print("\n[bold]Step 5: Connect Artemis to your AI IDE (MCP)[/bold]")
+    console.print("  [1] Antigravity / Jetski (Recommended - Default)")
+    console.print("  [2] Cursor")
+    console.print("  [3] Claude Desktop / Claude Code")
+    console.print("  [4] Windsurf")
+    console.print("  [5] All supported IDEs")
+    console.print("  [6] Skip for now")
+    mcp_choice = Prompt.ask(
+        "Select IDE for MCP auto-install", choices=["1", "2", "3", "4", "5", "6"], default="1"
+    )
+    if mcp_choice != "6":
+        target_map = {"1": "antigravity", "2": "cursor", "3": "claude", "4": "windsurf", "5": "all"}
+        target = target_map.get(mcp_choice, "antigravity")
+        try:
+            from artemis.interfaces.cli.commands.mcp import install_mcp_config
+            from mcp_server.utils import env_utils
+
+            proj_root = env_utils.get_project_root()
+            py_exe = env_utils.resolve_python_executable(proj_root)
+            installed_paths = install_mcp_config(target, py_exe, proj_root)
+            console.print(
+                f"[bold green]✔ Configured Artemis MCP in {len(installed_paths)} IDE location(s).[/bold green]"
+            )
+        except Exception as e:
+            console.print(f"[yellow]Could not auto-install MCP config: {e}[/yellow]")
+
     console.print()
     console.print(
         Panel(
@@ -141,6 +168,8 @@ def init_command() -> None:
             f"Configured [bold cyan]{provider_name}[/bold cyan] in [dim]{env_path}[/dim]\n\n"
             "Try running your first task:\n"
             '  [bold cyan]artemis run "Open YouTube and search for Lo-Fi Hip Hop"[/bold cyan]\n\n'
+            "Or connect/update your AI IDE anytime with:\n"
+            "  [bold cyan]artemis mcp --install all[/bold cyan]\n\n"
             "Or run health diagnostics anytime with:\n"
             "  [bold cyan]artemis doctor[/bold cyan]",
             title="☕ Ready to Go!",