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-hit-test.test.ts

@@ -280,3 +280,56 @@ describe("hitTest — empty results and scale", () => {
 		expect(ids(wFar, "torus", cam05, cursorOver(500, 500, cam05))).toBe(null);
 	});
 });
+
+describe("hitTest — Phase 29 hiddenIds parameter", () => {
+	const cam = camAt(500, 500);
+	test("a hidden primitive is skipped entirely", () => {
+		const w = new World(1000, 1000, [
+			point(1, 500, 500),
+			point(2, 500, 500, { priority: -1 }),
+		]);
+		// Without filtering, primitive 1 wins (higher priority).
+		expect(hitTest(w, cam, VP, cursorOver(500, 500, cam), "torus")?.primitive.id)
+			.toBe(1);
+		// With 1 hidden, the cursor falls through to primitive 2.
+		expect(
+			hitTest(
+				w,
+				cam,
+				VP,
+				cursorOver(500, 500, cam),
+				"torus",
+				new Set([1]),
+			)?.primitive.id,
+		).toBe(2);
+	});
+
+	test("hiding every match returns null", () => {
+		const w = new World(1000, 1000, [point(1, 500, 500)]);
+		expect(
+			hitTest(
+				w,
+				cam,
+				VP,
+				cursorOver(500, 500, cam),
+				"torus",
+				new Set([1]),
+			),
+		).toBeNull();
+	});
+
+	test("an empty hidden set is equivalent to omitting the parameter", () => {
+		const w = new World(1000, 1000, [point(1, 500, 500)]);
+		const a = hitTest(w, cam, VP, cursorOver(500, 500, cam), "torus");
+		const b = hitTest(
+			w,
+			cam,
+			VP,
+			cursorOver(500, 500, cam),
+			"torus",
+			new Set(),
+		);
+		expect(a?.primitive.id).toBe(1);
+		expect(b?.primitive.id).toBe(1);
+	});
+});