feat(ui): F8-12 — map polish (zoom invariance, labels, selection, soft radius) (#55)

* Honest pixel-space sizing for `pointRadiusPx` / `strokeWidthPx`: the
  renderer divides by the current camera scale on every
  `viewport.zoomed` so thin lines / small markers stay the same on-screen
  size at any zoom.
* Known-size planets switch to `pointRadiusWorld`, softened against the
  reference scale by `PLANET_SIZE_ZOOM_ALPHA = 0.33`; unidentified
  planets pin to a 3-px disc.
* New planet label layer renders a two-line `name / #N` legend under
  each planet (`#N` only for unidentified or when the new `planetNames`
  toggle is off). Selection now paints an inverse-fill frame around the
  selected planet's label plus an outline on the disc; the old
  selection-ring primitive is retired.
* Bombing markers swap the separate CirclePrim for a planet-outline
  overlay (damaged / wiped colour); the report deep-link moves to a
  "view bombing report" link in the planet inspector.
* Docs + tests follow: `renderer.md` reflects the new sizing contract +
  label / outline layers, vitest covers the sizing math, label
  formatting, and the new toggle, and the map-toggles e2e adds a
  persistence case for `planetNames`.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/tests/visibility-helpers.test.ts

@@ -82,10 +82,10 @@ describe("isCategoryVisible", () => {
 		expect(isCategoryVisible("planet-unidentified", t)).toBe(false);
 	});
 
-	test("battle and bombing markers have independent toggles", () => {
-		const t = toggles({ battleMarkers: false, bombingMarkers: true });
+	test("battleMarker toggle hides battle X-crosses without touching other layers", () => {
+		const t = toggles({ battleMarkers: false });
 		expect(isCategoryVisible("battleMarker", t)).toBe(false);
-		expect(isCategoryVisible("bombingMarker", t)).toBe(true);
+		expect(isCategoryVisible("planet-foreign", t)).toBe(true);
 	});
 });
 
@@ -202,6 +202,9 @@ describe("computeHiddenPlanetNumbers", () => {
 });
 
 describe("computeHiddenIds", () => {
+	// F8-12 / #30: bombings no longer ride the cascade as their own
+	// primitive — they paint a planet outline directly. The fixture
+	// here mirrors what `reportToWorld` currently emits.
 	const categories: Map<PrimitiveID, MapCategory> = new Map<
 		PrimitiveID,
 		MapCategory
@@ -212,11 +215,10 @@ describe("computeHiddenIds", () => {
 		[150, "hyperspaceGroup"],
 		[200, "incomingGroup"],
 		[300, "battleMarker"],
-		[400, "bombingMarker"],
 	]);
 	const planetDependents = new Map<number, ReadonlySet<PrimitiveID>>([
 		[1, new Set([1])],
-		[2, new Set([2, 100, 150, 200, 300, 400])],
+		[2, new Set([2, 100, 150, 200, 300])],
 	]);
 
 	test("category-toggle off hides every primitive in that category", () => {
@@ -239,10 +241,10 @@ describe("computeHiddenIds", () => {
 			new Set([2]),
 			toggles(),
 		);
-		expect(hidden).toEqual(new Set([2, 100, 150, 200, 300, 400]));
+		expect(hidden).toEqual(new Set([2, 100, 150, 200, 300]));
 	});
 
-	test("battle / bombing markers have independent toggles", () => {
+	test("battle markers honour the battleMarkers toggle independently", () => {
 		const hidden = computeHiddenIds(
 			categories,
 			planetDependents,
@@ -250,7 +252,7 @@ describe("computeHiddenIds", () => {
 			toggles({ battleMarkers: false }),
 		);
 		expect(hidden.has(300)).toBe(true);
-		expect(hidden.has(400)).toBe(false);
+		expect(hidden.has(150)).toBe(false);
 	});
 
 	test("planet cascade and category toggle compose without duplicates", () => {
@@ -262,7 +264,7 @@ describe("computeHiddenIds", () => {
 		);
 		// 300 is already present from the cascade; the category toggle
 		// re-adds it but Set semantics dedupe.
-		expect(hidden).toEqual(new Set([2, 100, 150, 200, 300, 400]));
+		expect(hidden).toEqual(new Set([2, 100, 150, 200, 300]));
 	});
 });