feat(ui): Phase 30 ship-class calculator with goal-seek and reach circles

Fuse the standalone ship-class designer (Phases 17/18) into a sidebar calculator: live mass/speed/attack/defence/bombing results, a planet build-rate readout, single-target goal-seek, a modernization-cost mode, and auto reach circles on the map for the selected planet.

pkg/calc becomes the single source for the new math (no mirroring): extract BombingPower from the engine model and the per-turn ship-production loop from controller.ProduceShip into pkg/calc (engine now delegates), and add inverse goal-seek solvers in pkg/calc/solve.go. Thin-bridge the combat, planet-build, and solver functions through ui/core/calc + ui/wasm and rebuild core.wasm.

Remove the standalone designer view/route; the ship-classes table and the view/bottom menus open the calculator via a shared request store.

Docs: rewrite ui/PLAN.md Phase 30, adjust Phase 34 (realistic forecast + CAP/COL ownership), add ui/docs/calculator-ux.md, extend calc-bridge.md, fix navigation.md; remove ui/CALCULATOR.md.

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

ui/frontend/tests/e2e/game-shell-inspector.spec.ts

@@ -227,3 +227,54 @@ test("clicking a planet on mobile raises the bottom-sheet, close clears it", asy
 	await page.getByTestId("inspector-planet-sheet-close").click();
 	await expect(page.getByTestId("inspector-planet-sheet")).toHaveCount(0);
 });
+
+// Counts reach-circle primitives off the renderer debug surface. Reach
+// circles use ids in [REACH_CIRCLE_ID_PREFIX, bombing-marker prefix) —
+// 0xb0000000..0xc0000000 (see `map/reach-circles.ts`).
+async function countReachCircles(page: Page): Promise<number> {
+	return page.evaluate(() => {
+		const surface = (
+			window as unknown as {
+				__galaxyDebug?: {
+					getMapPrimitives?: () => readonly { id: number; kind: string }[];
+				};
+			}
+		).__galaxyDebug;
+		const prims = surface?.getMapPrimitives?.() ?? [];
+		return prims.filter(
+			(p) => p.kind === "circle" && p.id >= 0xb0000000 && p.id < 0xc0000000,
+		).length;
+	});
+}
+
+test("calculator draws reach circles for the selected planet", async ({
+	page,
+}, testInfo) => {
+	test.skip(
+		testInfo.project.name.startsWith("chromium-mobile"),
+		"calculator + reach circles are a desktop-sidebar flow",
+	);
+	await setupShell(page);
+
+	// No reach circles before a planet is selected and a design exists.
+	expect(await countReachCircles(page)).toBe(0);
+
+	// Select the planet, then switch the sidebar to the calculator.
+	await clickCanvasCentre(page);
+	await page.getByTestId("sidebar-tab-calculator").click();
+	const calc = page.getByTestId("sidebar-tool-calculator");
+	await expect(calc).toBeVisible();
+
+	// A valid design with a positive drive tech override yields a
+	// positive loaded speed, which the calculator publishes to the map.
+	await calc.getByTestId("calculator-block-drive").fill("10");
+	await calc.getByTestId("calculator-block-shields").fill("5");
+	await calc.getByTestId("calculator-block-cargo").fill("5");
+	await calc.getByTestId("calculator-tech-drive").fill("1.2");
+
+	await expect.poll(() => countReachCircles(page)).toBeGreaterThan(0);
+
+	// Leaving ship mode clears the published reach, so the rings drop.
+	await calc.getByTestId("calculator-mode-modernization").click();
+	await expect.poll(() => countReachCircles(page)).toBe(0);
+});