feat(ui): map canvas follows light/dark theme; fix invisible gear control

The map view now selects a DARK_THEME or LIGHT_THEME palette from the
resolved app theme and threads it through every primitive builder, so
the canvas, planets, ship groups, cargo routes, battle/bombing markers,
fog, reach + selection rings, pending-Send tracks, and the pick overlay
all switch with the rest of the chrome. A theme flip remounts the
renderer preserving the camera — Pixi bakes the background at init and
every primitive bakes its colour at build, so a live re-tint is not
possible on the same instance.

This also fixes the reported bug: the gear-popover trigger and the
loading overlay hardcoded a dark navy background, so in light theme the
gear was invisible (dark icon on dark chip) until hover flipped it to a
white chip. Both now use the --color-surface-overlay token and read
correctly in both themes.

The light palette mirrors the dark one role-for-role, darkened /
saturated for contrast on a light background while keeping the incoming,
battle, and bombing accents vivid. The values are a first pass meant to
be refined during the F8 manual-QA loop.

Removes the now-dead "Phase 35" references from the code and lifts the
map-recoloring prohibition from the design-system / renderer docs; the
battle scene stays a fixed-palette data-viz surface.

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

ui/frontend/src/lib/active-view/map.svelte

@@ -33,6 +33,7 @@ preference the store already manages.
 	import { computeReachCircles } from "../../map/reach-circles";
 	import { computeSelectionRing } from "../../map/selection-ring";
 	import { reachStore } from "$lib/calculator/reach.svelte";
+	import { theme as themeStore } from "$lib/theme/theme.svelte";
 	import {
 		reportToWorld,
 		type HitTarget,
@@ -44,7 +45,12 @@ preference the store already manages.
 		computeHiddenPlanetNumbers,
 		fingerprintHiddenPlanets,
 	} from "../../map/visibility";
-	import type { PrimitiveID } from "../../map/world";
+	import {
+		DARK_THEME,
+		LIGHT_THEME,
+		type PrimitiveID,
+		type Theme,
+	} from "../../map/world";
 	import {
 		ORDER_DRAFT_CONTEXT_KEY,
 		OrderDraftStore,
@@ -132,6 +138,13 @@ preference the store already manages.
 	}> = [];
 	let mountedTurn: number | null = null;
 	let mountedGameId: string | null = null;
+	// The palette the current renderer was mounted with (DARK_THEME or
+	// LIGHT_THEME). A theme flip changes the singleton reference, which
+	// the effect detects to drive a camera-preserving remount — Pixi
+	// bakes the background colour at init and every primitive bakes its
+	// colour at build, so a live re-tint is not possible on the same
+	// instance.
+	let mountedPalette: Theme | null = null;
 	let onResize: (() => void) | null = null;
 	let detachClick: (() => void) | null = null;
 	let detachDebugProviders: (() => void) | null = null;
@@ -177,6 +190,11 @@ preference the store already manages.
 		// extras filter all derive from this rune.
 		const toggles = store?.mapToggles;
 		const gameId = store?.gameId ?? "";
+		// Track the resolved app theme so the canvas follows the user's
+		// light / dark choice. A flip re-keys the snapshot below and
+		// triggers a camera-preserving remount with the new palette.
+		const palette: Theme =
+			themeStore.resolved === "light" ? LIGHT_THEME : DARK_THEME;
 		if (!mounted || canvasEl === null || containerEl === null) return;
 		if (status !== "ready" || !report || toggles === undefined) return;
 
@@ -245,6 +263,7 @@ preference the store already manages.
 		const sameSnapshot =
 			mountedTurn === report.turn &&
 			mountedGameId === gameId &&
+			mountedPalette === palette &&
 			handle !== null;
 		if (sameSnapshot) {
 			// Apply wrap-mode flips in-place via the renderer's own
@@ -274,6 +293,7 @@ preference the store already manages.
 							toggles,
 							hiddenPlanetNumbers,
 							mode,
+							palette,
 						),
 					);
 				});
@@ -297,6 +317,7 @@ preference the store already manages.
 				extrasFingerprint,
 				draftCommands,
 				draftStatuses,
+				palette,
 			);
 		});
 	});
@@ -308,16 +329,22 @@ preference the store already manages.
 		toggles: MapToggles,
 		hiddenPlanetNumbers: ReadonlySet<number>,
 		mode: "torus" | "no-wrap",
+		palette: Theme,
 	): import("../../map/world").Primitive[] {
 		const skip = hiddenPlanetNumbers.size > 0 ? hiddenPlanetNumbers : undefined;
 		const cargo = toggles.cargoRoutes
-			? buildCargoRouteLines(report, skip ? { skipPlanets: skip } : undefined)
+			? buildCargoRouteLines(
+					report,
+					skip ? { skipPlanets: skip } : undefined,
+					palette,
+				)
 			: [];
 		const pending = buildPendingSendLines(
 			report,
 			draftCommands,
 			draftStatuses,
 			skip ? { skipPlanets: skip } : undefined,
+			palette,
 		);
 		// Reach circles published by the ship-class calculator. Empty
 		// when no own planet is selected or the design is invalid, so
@@ -331,11 +358,16 @@ preference the store already manages.
 						report.mapWidth,
 						report.mapHeight,
 						mode,
+						palette,
 					)
 				: [];
 		const selectedPlanetId =
 			selection?.selected?.kind === "planet" ? selection.selected.id : null;
-		const selectionRing = computeSelectionRing(report.planets, selectedPlanetId);
+		const selectionRing = computeSelectionRing(
+			report.planets,
+			selectedPlanetId,
+			palette,
+		);
 		return [
 			...cargo,
 			...pending,
@@ -370,10 +402,11 @@ preference the store already manages.
 		extrasFingerprint: string,
 		draftCommands: readonly OrderCommand[],
 		draftStatuses: Readonly<Record<string, string>>,
+		palette: Theme,
 	): Promise<void> {
 		mountInProgress = true;
 		try {
-			await mountRenderer(report, mode);
+			await mountRenderer(report, mode, palette);
 			if (handle === null) return;
 			applyVisibilityState(report, toggles, hiddenPlanetNumbers);
 			handle.setExtraPrimitives(
@@ -384,6 +417,7 @@ preference the store already manages.
 					toggles,
 					hiddenPlanetNumbers,
 					mode,
+					palette,
 				),
 			);
 			lastExtrasFingerprint = extrasFingerprint;
@@ -426,6 +460,7 @@ preference the store already manages.
 	async function mountRenderer(
 		report: NonNullable<GameStateStore["report"]>,
 		mode: "torus" | "no-wrap",
+		palette: Theme,
 	): Promise<void> {
 		if (canvasEl === null || containerEl === null) return;
 		// Capture camera state before disposing so a remount inside
@@ -462,7 +497,7 @@ preference the store already manages.
 				hitLookup: nextHitLookup,
 				categories,
 				planetDependents,
-			} = reportToWorld(report);
+			} = reportToWorld(report, palette);
 			hitLookup = nextHitLookup;
 			currentCategories = categories;
 			currentPlanetDependents = planetDependents;
@@ -471,6 +506,7 @@ preference the store already manages.
 				world,
 				mode,
 				preference: ["webgpu", "webgl"],
+				theme: palette,
 			});
 			const minScale = minScaleNoWrap(
 				{
@@ -592,6 +628,7 @@ preference the store already manages.
 			};
 			mountedTurn = report.turn;
 			mountedGameId = targetGameId;
+			mountedPalette = palette;
 			// runSerializedMount immediately pushes the visibility
 			// state + extras after this resolves; clearing the
 			// fingerprint here is defensive in case the post-mount
@@ -773,7 +810,7 @@ preference the store already manages.
 		left: 50%;
 		transform: translateX(-50%);
 		padding: 0.4rem 0.9rem;
-		background: rgba(20, 24, 42, 0.85);
+		background: var(--color-surface-overlay);
 		color: var(--color-text);
 		border: 1px solid var(--color-border);
 		border-radius: 6px;