feat(ui): Phase 29 map visibility toggles

Adds the gear-icon popover on the map view with per-game persistence
of every category toggle plus the wrap-mode radio. Hide-by-id and
visibility-fog facilities land on the renderer so every flip applies
within one frame without a Pixi remount; the wrap-mode toggle keeps
its existing remount + camera-preserve path. A new server-side turn
force-resets every flag to defaults so a hidden category never makes
the player miss the next turn's news.

Also fixes the FligthDistance → FlightDistance typo in pkg/calc/race.go
(plus the single Go caller); the TS side keeps duplicating the formula
until a race-level WASM bridge lands.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui/frontend/tests/map-math.test.ts

@@ -12,6 +12,7 @@ import {
 	distSqPointToSegment,
 	screenToWorld,
 	torusShortestDelta,
+	torusShortestDistance,
 	worldToScreen,
 } from "../src/map/math";
 
@@ -104,3 +105,22 @@ describe("screenToWorld and worldToScreen", () => {
 		expect(w1.x - w0.x).toBeCloseTo(1, 12);
 	});
 });
+
+describe("torusShortestDistance", () => {
+	test("returns plain Euclidean distance when no wrap is shorter", () => {
+		const d = torusShortestDistance(0, 0, 3, 4, 1000, 1000);
+		expect(d).toBeCloseTo(5, 12);
+	});
+
+	test("respects torus wrap on both axes", () => {
+		// Wrap on x: 50 → 950 across the seam is 100 units.
+		// Wrap on y: 100 → 900 across the seam is 200 units.
+		// Hypot(100, 200) ≈ 223.606.
+		const d = torusShortestDistance(50, 100, 950, 900, 1000, 1000);
+		expect(d).toBeCloseTo(Math.hypot(100, 200), 9);
+	});
+
+	test("zero when both points coincide", () => {
+		expect(torusShortestDistance(123, 456, 123, 456, 1000, 1000)).toBe(0);
+	});
+});