feat(webpage): add server subcommand delegating to mytoolkit server

`mytoolkit webpage <project> server <action>` mirrors
`mytoolkit server <action> <project>`, so each Docusaurus project can
manage its own dev/serve lifecycle from the webpage namespace.

bin/commands/webpage.py

@@ -14,7 +14,15 @@ import time
 
 import click
 
-from bin.commands.server import manageable_services, get_service, no_color_env
+from bin.commands.server import (
+    manageable_services,
+    get_service,
+    no_color_env,
+    server_start,
+    server_stop,
+    server_restart,
+    server_status,
+)
 
 
 _PROJECTS = manageable_services()
@@ -313,6 +321,37 @@ def _make_project_group(name: str, description: str) -> click.Group:
         """Open the exported PDF with the default application."""
         _pdf_open_impl(name, output)
 
+    @project_group.group(name="server")
+    def server_group():
+        """Manage this project's local dev/serve server (delegates to `mytoolkit server`)."""
+        pass
+
+    @server_group.command("start")
+    @click.option("--dev", is_flag=True, help="Start hot-reload dev server on the dev port (default: serve)")
+    @click.option("--rebuild", is_flag=True, help="Force npm run build before serve (no effect with --dev)")
+    def server_start_cmd(dev, rebuild):
+        """Start the project server in the background."""
+        click.get_current_context().invoke(server_start, name=name, dev=dev, rebuild=rebuild)
+
+    @server_group.command("stop")
+    @click.option("--dev", is_flag=True, help="Stop the dev-port instance instead of serve")
+    @click.option("--all", "all_modes", is_flag=True, help="Stop both dev and serve instances")
+    def server_stop_cmd(dev, all_modes):
+        """Stop the project server."""
+        click.get_current_context().invoke(server_stop, name=name, dev=dev, all_modes=all_modes)
+
+    @server_group.command("restart")
+    @click.option("--dev", is_flag=True, help="Restart the dev instance (default: serve)")
+    @click.option("--rebuild", is_flag=True, help="Force npm run build before serve (no effect with --dev)")
+    def server_restart_cmd(dev, rebuild):
+        """Restart the project server."""
+        click.get_current_context().invoke(server_restart, name=name, dev=dev, rebuild=rebuild)
+
+    @server_group.command("status")
+    def server_status_cmd():
+        """Show detailed server status (serve and dev ports)."""
+        click.get_current_context().invoke(server_status, name=name)
+
     return project_group