ui/phase-16: cargo routes inspector + map pick foundation

Add per-planet cargo routes (COL/CAP/MAT/EMP) to the inspector with
a renderer-driven destination picker (faded out-of-reach planets,
cursor-line anchor, hover-highlight) and per-route arrows on the
map. The pick-mode primitives are exposed via `MapPickService` so
ship-group dispatch in Phase 19/20 can reuse the same surface.

Pass A — generic map foundation:
- hit-test now sizes the click zone to `pointRadiusPx + slopPx` so
  the visible disc is always part of the target.
- `RendererHandle` gains `onPointerMove`, `onHoverChange`,
  `setPickMode`, `getPickState`, `getPrimitiveAlpha`,
  `setExtraPrimitives`, `getPrimitives`. The click dispatcher is
  centralised: pick-mode swallows clicks atomically so the standard
  selection consumers do not race against teardown.
- `MapPickService` (`lib/map-pick.svelte.ts`) wraps the renderer
  contract in a promise-shaped `pick(...)`. The in-game shell
  layout owns the service so sidebar and bottom-sheet inspectors
  see the same instance.
- Debug-surface registry exposes `getMapPrimitives`,
  `getMapPickState`, `getMapCamera` to e2e specs without spawning a
  separate debug page after navigation.

Pass B — cargo-route feature:
- `CargoLoadType`, `setCargoRoute`, `removeCargoRoute` typed
  variants with `(source, loadType)` collapse rule on the order
  draft; round-trip through the FBS encoder/decoder.
- `GameReport` decodes `routes` and the local player's drive tech
  for the inline reach formula (40 × drive). `applyOrderOverlay`
  upserts/drops route entries for valid/submitting/applied
  commands.
- `lib/inspectors/planet/cargo-routes.svelte` renders the
  four-slot section. `Add` / `Edit` call `MapPickService.pick`,
  `Remove` emits `removeCargoRoute`.
- `map/cargo-routes.ts` builds shaft + arrowhead primitives per
  cargo type; the map view pushes them through
  `setExtraPrimitives` so the renderer never re-inits Pixi on
  route mutations (Pixi 8 doesn't support that on a reused
  canvas).

Docs:
- `docs/cargo-routes-ux.md` covers engine semantics + UI map.
- `docs/renderer.md` documents pick mode and the debug surface.
- `docs/calc-bridge.md` records the Phase 16 reach waiver.
- `PLAN.md` rewrites Phase 16 to reflect the foundation + feature
  split and the decisions baked in (map-driven picker, inline
  reach, optimistic overlay via `setExtraPrimitives`).

Tests:
- `tests/map-pick-mode.test.ts` — pure overlay-spec helper.
- `tests/map-cargo-routes.test.ts` — `buildCargoRouteLines`.
- `tests/inspector-planet-cargo-routes.test.ts` — slot rendering,
  picker invocation, collapse, cancel, remove.
- Extensions to `order-draft`, `submit`, `order-load`,
  `order-overlay`, `state-binding`, `inspector-planet`,
  `inspector-overlay`, `game-shell-sidebar`, `game-shell-header`.
- `tests/e2e/cargo-routes.spec.ts` — Playwright happy path: add
  COL, add CAP, remove COL, asserting both the inspector and the
  arrow count via `__galaxyDebug.getMapPrimitives()`.

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

ui/frontend/tests/state-binding.test.ts

@@ -21,6 +21,8 @@ function makeReport(overrides: Partial<GameReport> = {}): GameReport {
 		planets: [],
 		race: "",
 		localShipClass: [],
+		routes: [],
+		localPlayerDrive: 0,
 		...overrides,
 	};
 }
@@ -136,4 +138,28 @@ describe("reportToWorld", () => {
 		const unknown = world.primitives.find((p) => p.id === 2);
 		expect(local?.priority ?? 0).toBeGreaterThan(unknown?.priority ?? 0);
 	});
+
+	test("cargo routes are NOT inlined into the static world", () => {
+		// As of Phase 16 cargo-route arrows are pushed onto the live
+		// renderer via `setExtraPrimitives` instead of being baked
+		// into `reportToWorld`. The base world stays a clean
+		// representation of the report's planets so the renderer
+		// can rebuild the overlay without disposing Pixi.
+		const world = reportToWorld(
+			makeReport({
+				planets: [
+					makePlanet({ number: 1, name: "Earth", x: 100, y: 100, kind: "local", size: 5, resources: 1 }),
+					makePlanet({ number: 2, name: "Mars", x: 300, y: 100, kind: "local", size: 5, resources: 1 }),
+				],
+				routes: [
+					{
+						sourcePlanetNumber: 1,
+						entries: [{ loadType: "COL", destinationPlanetNumber: 2 }],
+					},
+				],
+			}),
+		);
+		const lines = world.primitives.filter((p) => p.kind === "line");
+		expect(lines.length).toBe(0);
+	});
 });