ui/phase-15: planet inspector production controls + order-draft collapse

Adds the second end-to-end command (`setProductionType`) with a
collapse-by-`planetNumber` rule on the order draft, the segmented
production-controls component on the planet inspector, the FBS
encoder/decoder pair for `CommandPlanetProduce`, and the
`localShipClass` projection on `GameReport`. Forecast number is
deferred and tracked in the new `ui/docs/calc-bridge.md`.

ui/frontend/src/routes/games/[id]/+layout.svelte

@@ -117,6 +117,9 @@ fresh.
 		if (report === null) return null;
 		return report.planets.find((p) => p.number === sel.id) ?? null;
 	});
+	const localShipClass = $derived(
+		renderedReport.report?.localShipClass ?? [],
+	);
 
 	// Reveal the inspector whenever a new planet selection lands.
 	// Reading `selection.selected` once outside the effect keeps the
@@ -224,6 +227,7 @@ fresh.
 	/>
 	<PlanetSheet
 		planet={selectedPlanet}
+		{localShipClass}
 		onMap={effectiveTool === "map"}
 		onClose={() => selection.clear()}
 	/>