Lane C coverage uplift

Follow-up to PR #1539 closing the priority gaps surfaced by /ork:cover. No production code change — tests only.

tests +28 files changed 2 prod code unchanged 66/66 PASS

test-dashboard-specs.sh

16→33

+17 assertions · 7 negative · 7 render branches · 3 main

test-storybook-catalog-import.sh

22→33

+11 assertions · 3 control types · 3 hygiene · 1 missing-fp · 4 arg/parse

What got tested (was untested)

Group	Branch covered	File
Validator: forbidden-children rule	B6	render-spec.mjs
Validator: BarMeter missing required value	B5	render-spec.mjs
Validator: BarMeter invalid color	C2	render-spec.mjs
Validator: StatusBadge invalid status (verdict element fail-closed)	D1	render-spec.mjs
Validator: StatGrid invalid color/trend	E4, E5	render-spec.mjs
Validator: DataTable row with unknown column key	F3	render-spec.mjs
Renderer: Heatmap → markdown table	R14	render-spec.mjs
Renderer: Markdown component content passthrough	R15	render-spec.mjs
Renderer: StatGrid trend up/down arrows	R6, R7	render-spec.mjs
Renderer: StatusBadge warning/error glyphs	R9	render-spec.mjs
Main: `--json` flag	M5	render-spec.mjs
Main: no arg / missing file / invalid JSON	M1, M2	render-spec.mjs
Importer: date / array / boolean controls	AZ7, AZ12, AZ13	storybook-to-catalog.mjs
Importer: missing-name + duplicate-name drops	BC2, BC3	storybook-to-catalog.mjs
Importer: components.tsx with missing filePath	EC1	storybook-to-catalog.mjs
Importer: parse error / unknown flag / no `--out`	P7, MM1, MM8	storybook-to-catalog.mjs

Things deliberately not tested

validateCatalog.VC2 (z.any/z.unknown emission) — defense-in-depth, unreachable from any current input. Keeping the guard in the code without a synthetic test.
Top-level shape (A1, A2, A3) — improbable AI output (`spec` not object, `root` not string). Lower-priority than the per-element checks above.
StatusBadge unknown-status fallback (R10) — only fires when the validator fails open, which it shouldn't. Tested validator catches D1 instead.

Test command

Command	Result
bash tests/skills/test-dashboard-specs.sh	33/33 PASS
bash tests/skills/test-storybook-catalog-import.sh	33/33 PASS

Coverage estimate: render-spec ~70% (was ~30%) · storybook-to-catalog ~80% (was ~50%). Discovered by /ork:cover read-only audit; closed in this PR.