feat(site): phase 17 - per-game module pages, /runicnpc/, and checkTerms over the built site

PLAN.md §16 phase 17, built on the org lead's answers of 2026-10-22,
recorded as D75-D79 (count of record 79).

- D75: core marketing pages describe what a game module adds in core's
  words. "Game intelligence" became "What a game module adds"; each
  game's own list moved to src/data/games/ and renders only on the new
  /modules/uo/ and /modules/rust/. /modules/ is a card per game.
- The page-side capability check is per game (assertGameCoverage), the
  item phase 13 moved here.
- D76: the homepage keeps its game screenshot, labelled. screens.mjs
  entries may carry `game` (D67); Screenshot.astro and the app grid
  print the game's name and mark the figure data-game.
- D77: /app/ describes the Rust screens (released the same day).
- D78: /runicnpc/, the standalone page, is in the header and footer;
  the narrow header was re-measured so five links keep two rows.
- D79: checkTerms.mjs --built reads every built page's visible text
  after the build; game routes and data-game elements allow their
  game's words. Proven against ten plants. Still the twelfth check.
- Re-read fixes: /architecture/'s "two machines is also the maximum",
  Discord "guild" on /integrations/, and collection.mjs against what
  Steam sign-in and the Rust module keep (PLAY_DATA_SAFETY.md
  regenerated; the Play answers are unchanged).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

src/components/SupportedGames.astro

@@ -0,0 +1,63 @@
+---
+import { games } from '../data/games/index.mjs';
+
+/**
+ * "Supported games: Ultima Online · Rust" — PLAN.md §16, D63.
+ *
+ * The one place a core page names the games, and the way it hands a reader on to them. Core
+ * pages describe what a game module adds in core's words (D75); this strip is the link to
+ * the page where each game says it in its own. The names come from `platform.json` through
+ * `games/index.mjs`, so a third game appears here the day it is added there.
+ */
+interface Props {
+  /** Extra class for the caller's spacing. */
+  class?: string;
+}
+
+const { class: className } = Astro.props;
+---
+
+<p class:list={['games', className]}>
+  <span class="games__label">Supported games</span>
+  {
+    games.map((game, index) => (
+      <>
+        {index > 0 && <span class="games__sep" aria-hidden="true">·</span>}
+        <a class="games__link" href={game.href}>
+          {game.name}
+        </a>
+      </>
+    ))
+  }
+</p>
+
+<style>
+  .games {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: baseline;
+    gap: 0.35rem 0.65rem;
+    margin: 0;
+    font-size: 0.95rem;
+  }
+
+  .games__label {
+    color: var(--dim);
+    font-size: 0.78rem;
+    letter-spacing: 0.08em;
+    text-transform: uppercase;
+  }
+
+  .games__label::after {
+    content: ':';
+  }
+
+  .games__sep {
+    color: var(--dim);
+  }
+
+  .games__link {
+    color: var(--gold);
+    font-weight: 600;
+  }
+</style>