GameStatusSelector: custom element + typed contract (retire Alpine)

The Game status dropdown is now a <game-status-selector> light-DOM custom
element: the Python builder emits the tag + kebab attrs htpy-style, behavior
lives in ts/elements/{dropdown,game-status-selector}.ts wired by the native
connectedCallback, and GameStatusSelectorProps is the codegen'd contract. The
~70-line inline-Alpine f-string is gone.

Also fix SimpleTable to collect and re-attach the media of its row/header
nodes: it stringifies cells into the table markup, which silently dropped each
cell component's declared Media — so a <game-status-selector> in a cell never
got its <script> emitted. Now Page() emits it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ts/elements/game-status-selector.ts

@@ -0,0 +1,16 @@
+import { readGameStatusSelectorProps } from "../generated/props.js";
+import { initDropdown } from "./dropdown.js";
+
+class GameStatusSelectorElement extends HTMLElement {
+  connectedCallback(): void {
+    const props = readGameStatusSelectorProps(this);
+    initDropdown(this, {
+      patchUrl: `/api/games/${props.gameId}/status`,
+      bodyKey: "status",
+      event: "status-changed",
+      csrf: props.csrf,
+    });
+  }
+}
+
+customElements.define("game-status-selector", GameStatusSelectorElement);