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

package.json

@@ -23,6 +23,7 @@
     "check:reference": "node scripts/checkReference.mjs",
     "check:sidebar": "node scripts/checkSidebar.mjs",
     "check:terms": "node scripts/checkTerms.mjs",
+    "check:terms:built": "node scripts/checkTerms.mjs --built",
     "check:screens": "node scripts/checkScreens.mjs",
     "check:a11y": "node scripts/checkA11y.mjs",
     "check:csp": "node scripts/checkCsp.mjs",
@@ -32,7 +33,7 @@
     "brand:assets": "node scripts/buildBrandAssets.mjs",
     "screens:capture": "node scripts/captureScreens.mjs",
     "csp:hashes": "node scripts/checkCsp.mjs --reset && astro build && node scripts/checkCsp.mjs --write && astro build && node scripts/checkCsp.mjs",
-    "verify": "npm run check:sidebar && npm run check:terms && npm run check:screens && npm run check:tokens && npm run check:brand && npm run check:datasafety && npm run check && npm test && npm run build && npm run check:links && npm run check:facts && npm run check:quickstart && npm run check:reference && npm run test:served && npm run check:a11y && npm run check:csp",
+    "verify": "npm run check:sidebar && npm run check:terms && npm run check:screens && npm run check:tokens && npm run check:brand && npm run check:datasafety && npm run check && npm test && npm run build && npm run check:links && npm run check:terms:built && npm run check:facts && npm run check:quickstart && npm run check:reference && npm run test:served && npm run check:a11y && npm run check:csp",
     "test:served": "node --test test/headers.test.mjs"
   },
   "dependencies": {