check:viewport-meta and its self-test are described, in regions' words

The two scripts arrived without //scripts entries. The text is regions', written to match the neighbouring entries; its '8 self-tests' was re-read against the file this round carries (sha256 a886af2dca66e012, 124 lines).

package.json

@@ -393,6 +393,8 @@
     "check:auto-engine": "BROWSER. The default engine (auto) is MapLibre, token or not: on one map leaf, no token AND a host token alone both draw with MapLibre, paint, and make zero api.mapbox.com requests; ?provider=mapbox with that token draws Mapbox and carries it. In gates:post, NOT MEASURED outside the browser slot.",
     "check:no-new-driver-references": "shipped text (library, plugins, internal, docs, skills, README) neither quotes nor cites the Driver: a line that refers to the Driver and is not in internal/fixtures/driver-references-baseline.json FAILS. Forward-only: the baseline, keyed by file and line text with counts (not line numbers), may only shrink as owners sweep their areas (--shrink tidies it; it never grows). Matches the role word only, not a GPU or device driver. Node only.",
     "check:no-orphan-gates": "every gate-shaped internal/*.mjs is reachable or tagged @one-shot; and every check:/verify:/smoke: script is run by a standing chain, matched by EXACT name (gates:pre, gates:post, the browser suite GATES, the build, and what those bun run), or declared in internal/fixtures/on-demand-checks.json with its reason, or in the shrink-only baseline of the 2026-09-29 orphans. A chained :self-test does not chain its gate. --shrink / --init maintain the baseline.",
+    "check:viewport-meta": "every generated page declares <meta name=\"viewport\"> with width=device-width. Without it a browser lays the page out at the 980px desktop fallback even when the viewport is set to 390, so a mobile probe silently measures a viewport no phone has and still passes (measured: innerWidth 980 without the tag, 390 with it). width=device-width is required specifically, because a meta carrying only initial-scale still lays out at 980. Checked on the BUILT tree, not the generator template. Fixed-size print sheets are exempt by their stated shape (a .stage with a three-digit px width), and a page that must render at a fixed desktop width carries a viewport-meta-ok: reason. 8 self-tests. Source-only, headless.",
+    "check:viewport-meta:self-test": "plants each check:viewport-meta violation - no meta at all, and a meta with initial-scale but no width=device-width - and confirms both are caught, that correct tags in either quote style or uppercase pass, and that the print-sheet exemption applies to a fixed-px stage but NOT to a responsive one.",
     "check:plural-forms": "the three things a CLDR pluralRules map can silently break. (1) FORM COUNT: a locale must author as many forms as it has CLDR categories or the pick clamps onto the wrong one (ru 4, ar 6). (2) THE tStatic PATH: seven bundles install no vue-i18n and read through tStatic, which does NO plural selection, so a pipe key there reaches the page as the literal \"a | b | c\". (3) ZERO: a locale with an explicit CLDR zero category must author it. Written as the precondition for installing the map, and kept as the guard after.",
     "check:backlog-refs": "a card may not depend on a card that does not exist. A dangling depends_on can never be done, so the card can never become ready and nothing says so — it reads as ordinary blocked work forever. FAILS only for depends_on on an OPEN card; a dangling parent or a stale link on a done card is REPORTED, because failing on filing debt teaches people to delete the reference rather than restore the card. Reads all three phase backlogs — references legitimately cross phases. SKIPs when _qa-cycle is absent.",
     "check:basemap-labels": "the BASEMAP's place names follow the reader's language on BOTH engines (library/maps/localize-labels.js): reads the RENDERED country labels at ?lang=en and ?lang=ru — Mapbox via the Standard basemap's place-labels featureset, MapLibre via each symbol's evaluated text — and requires them to flip. Serves this checkout on an OS-assigned port; --dir <tree> for a negative control. Negative-tested: a bundle built before 319064a1 FAILS on both engines.",