game/internal/model/game/race.go

@@ -1,6 +1,7 @@
 package game
 
 import (
+	"galaxy/calc"
 	"strings"
 
 	"github.com/google/uuid"
@@ -54,9 +55,9 @@ func (r Race) TechLevel(t Tech) float64 {
 }
 
 func (r Race) FlightDistance() float64 {
-	return r.TechLevel(TechDrive) * 40
+	return calc.FligthDistance(r.TechLevel(TechDrive))
 }
 
 func (r Race) VisibilityDistance() float64 {
-	return r.TechLevel(TechDrive) * 30
+	return calc.VisibilityDistance(r.TechLevel(TechDrive))
 }

pkg/calc/race.go

@@ -0,0 +1,13 @@
+package calc
+
+// max flight distance for race's driveTech level.
+// applies for sending ships and setting routes.
+func FligthDistance(driveTech float64) float64 {
+	return driveTech * 40
+}
+
+// max visible distance for race's driveTech level.
+// applies for all race's planets to show foreign in-space groups in report.
+func VisibilityDistance(driveTech float64) float64 {
+	return driveTech * 30
+}

ui/docs/calc-bridge.md

@@ -72,12 +72,21 @@ destination picker. The engine formula is trivial:
 flightDistance = driveTech * 40
 ```
 
-(`game/internal/model/game/race.go.FlightDistance`). The original
-Phase 16 stage text described surfacing this through `pkg/calc/`
-and `ui/core/calc/`; with the calc-bridge phase still deferred,
-implementing the bridge for one constant-time multiplication would
-be premature scaffolding. The picker therefore computes reach
-inline in TypeScript using
+The Go-side reference now lives in
+[`pkg/calc/race.go`](../../pkg/calc/race.go) as
+`FligthDistance(driveTech) float64` (alongside the matching
+`VisibilityDistance` for in-space group reports — used in later
+phases). The engine call sites
+(`game/internal/model/game/race.go.FlightDistance`,
+`game/internal/controller/route.go.PlanetRouteSet`) still wrap the
+Go formula directly; promoting them to call `pkg/calc/` is a
+follow-up cleanup outside Phase 16's scope.
+
+The original Phase 16 stage text described surfacing this through
+`pkg/calc/` and `ui/core/calc/`; with the calc-bridge phase still
+deferred, implementing the WASM glue for one constant-time
+multiplication would be premature scaffolding. The picker
+therefore computes reach inline in TypeScript using
 `torusShortestDelta(planet.x, candidate.x, mapWidth)` and
 `Math.hypot` against `40 * report.localPlayerDrive`, where
 `localPlayerDrive` is decoded from the report's `Player` block by
@@ -85,11 +94,11 @@ matching `Player.name` to `report.race`
 (`api/game-state.ts.findLocalPlayerDrive`).
 
 When the calc-bridge phase ships, the inline formula is replaced
-with a single call into the bridge: `calc.Reach(driveTech)` becomes
-the source of truth for both the picker and the cargo-route arrow
-auto-removal at turn cutoff. Until then, the UI duplicates
-`flightDistance` knowingly — same precedent as the production
-forecast deferral above.
+with a single call into the bridge — `calc.FligthDistance(driveTech)`
+becomes the source of truth for both the picker and the
+cargo-route auto-removal at turn cutoff. Until then, the UI
+duplicates `flightDistance` knowingly — same precedent as the
+production forecast deferral above.
 
 ## Planned bridge shape (follow-up phase)
 

ui/docs/cargo-routes-ux.md

@@ -123,11 +123,20 @@ localPlayerDrive`. The local player's drive comes from the report's
 `Player` block, looked up by `name === report.race`
 (`api/game-state.ts.findLocalPlayerDrive`).
 
+The Go-side counterpart is `pkg/calc/race.go.FligthDistance`. The
+engine accepts a route from a player-owned planet to **any** planet
+inside that distance — own, foreign-race, uninhabited, or
+unidentified all qualify
+(`game/internal/controller/route.go.PlanetRouteSet` only enforces
+ownership of the *origin*). The picker mirrors that contract: the
+`reachableSet()` in `cargo-routes.svelte` filters out only the
+source planet itself.
+
 Why inline rather than via a Go calc bridge? See the Phase 15 / 16
 deferral note in [`calc-bridge.md`](./calc-bridge.md). The formula
 is trivial (`tech × 40`) and the WASM glue would be premature
 infrastructure; when the calc bridge phase lands the shared
-`pkg/calc.Reach` will replace this implementation.
+`pkg/calc.FligthDistance` will replace this implementation.
 
 ## Tests
 

ui/frontend/src/lib/inspectors/planet/cargo-routes.svelte

@@ -104,11 +104,18 @@ The component is purposely deferential to the existing infrastructure:
 	const reach = $derived(40 * localPlayerDrive);
 
 	function reachableSet(): Set<number> {
+		// The engine accepts a route from a player-owned planet to any
+		// planet inside the source's flight distance — own, foreign,
+		// uninhabited, and unidentified all qualify (`game/internal/
+		// controller/route.go.PlanetRouteSet` only checks ownership of
+		// the origin and `util.ShortDistance(...) <= FligthDistance`,
+		// see `pkg/calc/race.go`). The picker mirrors that contract;
+		// only the source itself is excluded so a self-route cannot be
+		// emitted.
 		const ids = new Set<number>();
 		if (reach <= 0) return ids;
 		for (const candidate of planets) {
 			if (candidate.number === planet.number) continue;
-			if (candidate.kind === "unidentified") continue;
 			const dx = torusShortestDelta(planet.x, candidate.x, mapWidth);
 			const dy = torusShortestDelta(planet.y, candidate.y, mapHeight);
 			if (Math.hypot(dx, dy) <= reach) {

ui/frontend/src/map/pick-mode.ts

@@ -151,10 +151,20 @@ export function computePickOverlay(
  * PICK_OVERLAY_STYLE captures the colours / widths the renderer
  * applies to each spec channel. Exported so tests and future themes
  * can read the same values.
+ *
+ * `dimAlpha` and `dimTint` are applied together to non-reachable
+ * primitives during a pick session: the alpha drops their
+ * brightness, and the tint multiplies their fill colour toward dark
+ * gray so the colour identity (planet kind) collapses into a
+ * single muted shade. The combination has to read as "obviously
+ * disabled" against the dark theme — bright planets such as
+ * `STYLE_LOCAL` (`0x6dd2ff`) survive a 0.3 alpha alone too
+ * comfortably, so the tint pulls them down too.
  */
 export const PICK_OVERLAY_STYLE = {
 	anchor: { color: 0xffe082, alpha: 0.9, width: 2 },
 	line: { color: 0xffe082, alpha: 0.5, width: 1 },
 	hover: { color: 0xffe082, alpha: 1, width: 2 },
-	dimAlpha: 0.3,
+	dimAlpha: 0.35,
+	dimTint: 0x303841,
 } as const;

ui/frontend/src/map/render.ts

@@ -380,6 +380,7 @@ export async function createRenderer(opts: RendererOptions): Promise<RendererHan
 	let pickOptions: PickModeOptions | null = null;
 	let pickOverlay: Graphics | null = null;
 	const dimmedAlphaBackup = new Map<Graphics, number>();
+	const dimmedTintBackup = new Map<Graphics, number>();
 	const detachPickListeners: Array<() => void> = [];
 
 	const handleViewportClicked = (e: {
@@ -462,6 +463,8 @@ export async function createRenderer(opts: RendererOptions): Promise<RendererHan
 		detachPickListeners.length = 0;
 		for (const [g, alpha] of dimmedAlphaBackup) g.alpha = alpha;
 		dimmedAlphaBackup.clear();
+		for (const [g, tint] of dimmedTintBackup) g.tint = tint;
+		dimmedTintBackup.clear();
 		if (pickOverlay !== null) {
 			pickOverlay.destroy();
 			pickOverlay = null;
@@ -484,7 +487,9 @@ export async function createRenderer(opts: RendererOptions): Promise<RendererHan
 			if (options.reachableIds.has(id)) continue;
 			for (const g of list) {
 				dimmedAlphaBackup.set(g, g.alpha);
+				dimmedTintBackup.set(g, g.tint as number);
 				g.alpha = PICK_OVERLAY_STYLE.dimAlpha;
+				g.tint = PICK_OVERLAY_STYLE.dimTint;
 			}
 		}
 		// Overlay graphic. Lives in the origin copy so the central

ui/frontend/tests/inspector-planet-cargo-routes.test.ts

@@ -221,6 +221,100 @@ describe("planet inspector — cargo routes", () => {
 		).toBeInTheDocument();
 	});
 
+	test("the reachable set spans every planet kind in range, not only own", async () => {
+		// Reach = 40 * 1.5 = 60. Each candidate at distance 50 — in
+		// reach. The picker must include the foreign-race planet,
+		// the uninhabited rock, and the unidentified target so the
+		// engine's "destinations may be any planet" rule is honoured
+		// (route.go: only the source's ownership is enforced).
+		const { ui, pick } = mount(
+			makePlanet({
+				number: 1,
+				name: "Earth",
+				x: 100,
+				y: 100,
+				kind: "local",
+			}),
+			[
+				makePlanet({
+					number: 1,
+					name: "Earth",
+					x: 100,
+					y: 100,
+					kind: "local",
+				}),
+				makePlanet({
+					number: 2,
+					name: "Alpha",
+					x: 150,
+					y: 100,
+					kind: "other",
+					owner: "Aliens",
+				}),
+				makePlanet({
+					number: 3,
+					name: "Rock",
+					x: 100,
+					y: 150,
+					kind: "uninhabited",
+				}),
+				makePlanet({
+					number: 4,
+					name: "",
+					x: 50,
+					y: 100,
+					kind: "unidentified",
+				}),
+			],
+			[],
+			1.5,
+		);
+		await fireEvent.click(ui.getByTestId("inspector-planet-cargo-slot-col-add"));
+		await waitFor(() => expect(pick.invocations.length).toBe(1));
+		expect(
+			Array.from(pick.invocations[0]!.request.reachableIds).sort(),
+		).toEqual([2, 3, 4]);
+	});
+
+	test("the picker accepts an unidentified destination", async () => {
+		const { ui, pick } = mount(
+			makePlanet({
+				number: 1,
+				name: "Earth",
+				x: 100,
+				y: 100,
+				kind: "local",
+			}),
+			[
+				makePlanet({
+					number: 1,
+					name: "Earth",
+					x: 100,
+					y: 100,
+					kind: "local",
+				}),
+				makePlanet({
+					number: 9,
+					name: "",
+					x: 130,
+					y: 100,
+					kind: "unidentified",
+				}),
+			],
+			[],
+			1.5,
+		);
+		await fireEvent.click(ui.getByTestId("inspector-planet-cargo-slot-mat-add"));
+		await waitFor(() => expect(pick.invocations.length).toBe(1));
+		pick.invocations[0]!.resolve(9);
+		await waitFor(() => expect(draft.commands).toHaveLength(1));
+		const cmd = draft.commands[0]!;
+		expect(cmd.kind).toBe("setCargoRoute");
+		if (cmd.kind !== "setCargoRoute") return;
+		expect(cmd.destinationPlanetNumber).toBe(9);
+		expect(cmd.loadType).toBe("MAT");
+	});
+
 	test("a successful pick emits setCargoRoute and closes the prompt", async () => {
 		const { ui, pick } = mount(
 			makePlanet({ number: 1, name: "Earth", x: 100, y: 100 }),