Fix variant-aware fleet card map labels (Refs #150)

src/lib/fleet-overview.ts

@@ -66,7 +66,9 @@ export function freshServer(server: FleetServer, now: number): boolean {
     );
 }
 
-export function fleetIdentity(server: FleetServer) {
+export function fleetIdentity(
+    server: Pick<FleetServer, 'name' | 'game' | 'map' | 'map_slug' | 'game_mode' | 'last_map'>
+) {
     const parsed = parseServerName(server.name);
     const game = server.game ?? parsed?.game ?? '';
     const mode = server.game_mode ?? parsed?.gameMode;

src/lib/ui/components/ServerCard.svelte

@@ -5,7 +5,8 @@
     import type { RosterPlayer, Health } from '$ui/stores/servers.js';
     import { telemetryByServer, uiNow } from '$ui/stores/servers.js';
     import { elapsedSince } from '$ui/duration.js';
-    import { mapTitle, serverIdentity, serverTitle } from '$ui/server-labels.js';
+    import { serverIdentity, serverTitle } from '$ui/server-labels.js';
+    import { fleetIdentity } from '$lib/fleet-overview.js';
     import { decodeRconError, rconFixHint } from '$ui/rconError.js';
     import Card from './primitives/Card.svelte';
     import Badge from './primitives/Badge.svelte';
@@ -20,6 +21,9 @@
         name: string;
         players?: number | null;
         map?: string | null;
+        game?: string | null;
+        mapSlug?: string | null;
+        gameMode?: string | null;
         gametype?: string | null;
         roster?: RosterPlayer[] | null;
         health?: Health;
@@ -45,6 +49,9 @@
         name,
         players = null,
         map = null,
+        game: serverGame = null,
+        mapSlug = null,
+        gameMode = null,
         roster = null,
         health = 'offline',
         lastSeenAt = null,
@@ -76,8 +83,17 @@
     const compact = $derived(compactEmpty && health === 'online' && players === 0 && !restarting);
     const state = $derived(restarting ? 'restarting' : compact ? 'ready' : health);
     const error = $derived(decodeRconError(lastError));
-    const mapLabel = $derived(mapTitle(map));
+    const mapLabel = $derived(
-    const showMap = $derived(mapLabel !== '—' && mapLabel !== title);
+        fleetIdentity({
+            name,
+            game: serverGame,
+            map,
+            last_map: null,
+            map_slug: mapSlug,
+            game_mode: gameMode
+        }).map
+    );
+    const showMap = $derived(map !== null && mapLabel !== '—' && mapLabel !== title);
     const topRoster = $derived(
         (roster ?? [])
             .slice()

src/lib/ui/server-labels.ts

@@ -7,13 +7,12 @@ export function gameTitle(game: string | null | undefined, compact = false): str
 }
 
 export function mapTitle(map: string | null | undefined): string {
-    return (
+    const matches = [...T5_ZOMBIE_MAPS, ...T6_ZOMBIE_MAPS].filter(
-        [...T5_ZOMBIE_MAPS, ...T6_ZOMBIE_MAPS].find(
+        (entry) => entry.canonical === map?.toLowerCase()
-            (entry) => entry.canonical === map?.toLowerCase()
-        )?.friendly ??
-        map ??
-        '—'
     );
+    // Engine identifiers alone cannot distinguish selections such as Town and TranZit.
+    if (matches.length > 1) return `${map} (variant unknown)`;
+    return matches[0]?.friendly ?? map ?? '—';
 }
 
 export function serverTitle(name: string): string {

src/routes/+page.svelte

@@ -552,6 +552,9 @@
                                         telemetry={server.telemetry}
                                         players={server.last_players}
                                         map={server.last_map ?? server.map}
+                                        game={server.game}
+                                        mapSlug={server.map_slug}
+                                        gameMode={server.game_mode}
                                         capacity={currentCapacity(server, observationNow())}
                                         gametype={server.last_gametype}
                                         roster={server.roster}

tests/client/ui-server-card-maps.test.ts

@@ -0,0 +1,190 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { flushSync, mount, unmount, type ComponentProps } from 'svelte';
+import { fromStore, writable } from 'svelte/store';
+import ServerCard from '../../src/lib/ui/components/ServerCard.svelte';
+import ServerIdentity from '../../src/lib/ui/components/ServerIdentity.svelte';
+import PlayerScoreboard from '../../src/lib/ui/components/PlayerScoreboard.svelte';
+import { fleetIdentity } from '../../src/lib/fleet-overview.js';
+import { gameEvent } from '../helpers/telemetry.js';
+
+afterEach(async () => {
+    await Promise.all(components.splice(0).map((component) => unmount(component)));
+    document.body.replaceChildren();
+});
+vi.mock('$app/stores', () => ({
+    page: writable({ url: new URL('http://localhost/') })
+}));
+const components: ReturnType<typeof mount>[] = [];
+type MapServer = Parameters<typeof fleetIdentity>[0];
+const town: MapServer = {
+    name: 't6_zombie_town_1',
+    game: 't6',
+    map: 'zm_transit',
+    last_map: 'zm_transit'
+};
+
+function show(
+    initial: MapServer,
+    options: Partial<ComponentProps<typeof ServerCard>> = {},
+    fleetHeading = true
+) {
+    const store = writable(initial);
+    const state = fromStore(store);
+    const identity = () => fleetIdentity(state.current);
+    components.push(
+        mount(ServerCard, {
+            target: document.body,
+            props: {
+                get name() {
+                    return state.current.name;
+                },
+                get game() {
+                    return state.current.game;
+                },
+                get map() {
+                    return state.current.last_map ?? state.current.map;
+                },
+                get mapSlug() {
+                    return state.current.map_slug;
+                },
+                get gameMode() {
+                    return state.current.game_mode;
+                },
+                get mapLabelOverride() {
+                    return fleetHeading ? identity().map : undefined;
+                },
+                health: 'online',
+                players: 4,
+                ...options
+            }
+        }),
+        mount(ServerIdentity, {
+            target: document.body,
+            props: {
+                get name() {
+                    return state.current.name;
+                },
+                get mapLabel() {
+                    return identity().map;
+                }
+            }
+        }),
+        mount(PlayerScoreboard, {
+            target: document.body,
+            props: {
+                get report() {
+                    return {
+                        ...gameEvent(
+                            'heartbeat',
+                            12,
+                            4,
+                            state.current.name,
+                            state.current.last_map ?? state.current.map ?? ''
+                        ),
+                        receivedAt: new Date().toISOString()
+                    };
+                },
+                get mapLabel() {
+                    return identity().map;
+                }
+            }
+        })
+    );
+    flushSync();
+    return (next: Partial<MapServer>) => {
+        store.update((server) => ({ ...server, ...next }));
+        flushSync();
+    };
+}
+function expectLabels(label: string) {
+    expect(document.querySelector('h3')?.textContent).toBe(label);
+    expect(document.querySelector('.identity .map')?.textContent).toBe(label);
+    expect(document.querySelector('.match-title h2')?.textContent).toBe(label);
+    expect(document.querySelector('.map-note')).toBeNull();
+}
+
+const variants = [
+    ['town', 'Town Survival'],
+    ['farm', 'Farm Survival'],
+    ['busdepot', 'Bus Depot Survival'],
+    ['transit', 'TranZit']
+];
+describe('variant-aware rendered map labels', () => {
+    it.each(variants)('keeps %s consistent across card, list, and detail', (slug, label) => {
+        const update = show({ ...town, name: `t6_zombie_${slug}_1` });
+        expectLabels(label);
+        update({ name: 'Friday lobby', map_slug: slug, game_mode: 'zombie' });
+        expectLabels(label);
+    });
+
+    it.each([undefined, null, 'unknown'])('does not infer TranZit from variant %s', (map_slug) => {
+        const server = { ...town, name: 'Custom lobby', map_slug };
+        show(server);
+        expectLabels('zm_transit (variant unknown)');
+        expect(fleetIdentity(server).launch).toBeNull();
+    });
+
+    it('lets unknown stored metadata override a recognized name', () => {
+        show({ ...town, map_slug: 'unknown' });
+        expectLabels('zm_transit (variant unknown)');
+    });
+
+    it('updates map and variant metadata reactively without retaining an obsolete launch shortcut', () => {
+        const update = show(town);
+        expectLabels('Town Survival');
+        update({ last_map: 'zm_tomb' });
+        expectLabels('Origins');
+        expect(fleetIdentity({ ...town, last_map: 'zm_tomb' }).launch).toBeNull();
+        update({ last_map: 'zm_transit', map_slug: 'farm' });
+        expectLabels('Farm Survival');
+        expect(fleetIdentity({ ...town, map_slug: 'farm' }).launch).toEqual({
+            game: 't6',
+            slug: 'farm'
+        });
+        update({ map_slug: 'unknown' });
+        expectLabels('zm_transit (variant unknown)');
+        update({ last_map: 'zm_buried' });
+        expectLabels('Buried');
+    });
+
+    it.each(['stale', 'offline'] as const)(
+        'keeps the selected variant for %s observations',
+        (health) => {
+            show(town, { health, lastSeenAt: '2026-01-01T00:00:00Z' });
+            expectLabels('Town Survival');
+        }
+    );
+
+    it.each([true, false])('preserves empty-card compact=%s behavior', (compactEmpty) => {
+        show(town, { players: 0, compactEmpty });
+        expectLabels('Town Survival');
+        expect(document.querySelector('article')?.classList.contains('compact')).toBe(compactEmpty);
+        expect(document.querySelector('article .metrics') === null).toBe(compactEmpty);
+    });
+
+    it.each([
+        ['online', 'Current map'],
+        ['stale', 'Last map'],
+        ['offline', 'Last map']
+    ] as const)('retains useful %s map context with a name-based heading', (health, prefix) => {
+        const update = show(town, { health }, false);
+        expect(document.querySelector('.map-note')).toBeNull();
+        update({ last_map: 'zm_tomb' });
+        expect(document.querySelector('h3')?.textContent).toBe('Town Survival');
+        expect(document.querySelector('.map-note')?.textContent?.trim()).toBe(`${prefix}: Origins`);
+    });
+
+    it('hides additional map context in compact cards', () => {
+        show({ ...town, last_map: 'zm_tomb' }, { players: 0 }, false);
+        expect(document.querySelector('.map-note')).toBeNull();
+    });
+
+    it('uses stored variant metadata for a custom heading and does not invent a missing observation', () => {
+        const update = show({ ...town, name: 'Friday lobby', map_slug: 'town' }, {}, false);
+        expect(document.querySelector('.map-note')?.textContent?.trim()).toBe(
+            'Current map: Town Survival'
+        );
+        update({ map: null, last_map: null });
+        expect(document.querySelector('.map-note')).toBeNull();
+    });
+});