feat: 新增皮肤站玩家管理视图

- SkinSiteProfileView：玩家列表、选中玩家的 3D 预览，以及皮肤 /
  披风 / 鞘翅的上传与删除；Mojang 账号只读。
- 账号卡增加「My players」入口，主页在该视图与首页之间切换。
- 3D 预览复用 SkinPreviewRenderer。

apps/app-frontend/src/components/ui/skin-site/SkinSiteAccountCard.vue

@@ -30,9 +30,10 @@ const messages = defineMessages({
 	error: { id: 'app.skin-site.home.error', defaultMessage: 'Could not load players.' },
 	signIn: { id: 'app.skin-site.home.sign-in', defaultMessage: 'Sign in' },
 	settings: { id: 'app.skin-site.home.settings', defaultMessage: 'Account' },
+	myPlayers: { id: 'app.skin-site.home.my-players', defaultMessage: 'My players' },
 })
 
-const emit = defineEmits<{ (e: 'sign-in' | 'open-settings'): void }>()
+const emit = defineEmits<{ (e: 'sign-in' | 'open-settings' | 'open-players'): void }>()
 
 const luck = ref<number | null>(null)
 const luckLoading = ref(false)

apps/app-frontend/src/components/ui/skin-site/SkinSiteHome.vue

@@ -9,6 +9,7 @@ import SkinSiteDonationCard from './SkinSiteDonationCard.vue'
 import SkinSiteLoginModal from './SkinSiteLoginModal.vue'
 import SkinSiteNavCards from './SkinSiteNavCards.vue'
 import SkinSiteProfileModal from './SkinSiteProfileModal.vue'
+import SkinSiteProfileView from './SkinSiteProfileView.vue'
 
 const { formatMessage } = useVIntl()
 const { addNotification } = injectNotificationManager()
@@ -26,6 +27,7 @@ const messages = defineMessages({
 const YGGDRASIL_URL = 'https://skin.starlight.cool/yggdrasil'
 const loginModal = ref<InstanceType<typeof SkinSiteLoginModal>>()
 const profileModal = ref<InstanceType<typeof SkinSiteProfileModal>>()
+const view = ref<'home' | 'players'>('home')
 
 async function copyAddress() {
 	try {
@@ -40,12 +42,19 @@ async function copyAddress() {
 <template>
 	<div class="flex h-full min-h-0 w-full flex-col overflow-y-auto">
 		<div class="mx-auto flex w-full max-w-5xl flex-col gap-6 p-6">
+			<SkinSiteProfileView v-if="view === 'players'" @back="view = 'home'" />
+
+			<template v-else>
 				<header class="flex flex-col items-center gap-1 text-center">
 					<h1 class="m-0 text-2xl font-bold text-contrast">{{ formatMessage(messages.title) }}</h1>
 					<p class="m-0 text-sm text-secondary">{{ formatMessage(messages.subtitle) }}</p>
 				</header>
 
-			<SkinSiteAccountCard @sign-in="loginModal?.show()" @open-settings="profileModal?.show()" />
+				<SkinSiteAccountCard
+					@sign-in="loginModal?.show()"
+					@open-settings="profileModal?.show()"
+					@open-players="view = 'players'"
+				/>
 
 				<div class="grid grid-cols-1 gap-6 lg:grid-cols-2">
 					<SkinSiteNavCards />
@@ -70,6 +79,7 @@ async function copyAddress() {
 						{{ formatMessage({ id: 'app.skin-site.home.copy', defaultMessage: 'Copy' }) }}
 					</button>
 				</div>
+			</template>
 		</div>
 
 		<SkinSiteLoginModal ref="loginModal" />

apps/app-frontend/src/components/ui/skin-site/SkinSiteProfileView.vue

@@ -0,0 +1,283 @@
+<script setup lang="ts">
+import { SpinnerIcon, TrashIcon, UploadIcon } from '@modrinth/assets'
+import { Avatar, defineMessages, injectNotificationManager, useVIntl } from '@modrinth/ui'
+import SkinPreviewRenderer from '@modrinth/ui/src/components/skin/SkinPreviewRenderer.vue'
+import { computed, onMounted, ref, watch } from 'vue'
+
+import {
+	requestSkinSitePlayers,
+	skinSitePlayers,
+	skinSitePlayersStatus,
+	skinSiteStatus,
+	skinSiteUser,
+} from '@/composables/skin-site-session'
+import {
+	skinSiteDeleteTexture,
+	type SkinSitePlayerSkin,
+	skinSitePlayerSkin,
+	skinSiteUploadTexture,
+	type SkinTextureType,
+} from '@/helpers/skin-site-api'
+
+const { formatMessage } = useVIntl()
+const { handleError, addNotification } = injectNotificationManager()
+
+const emit = defineEmits<{ (e: 'back'): void }>()
+
+const messages = defineMessages({
+	title: { id: 'app.skin-site.profile-view.title', defaultMessage: 'Your players' },
+	signedOut: {
+		id: 'app.skin-site.profile-view.signed-out',
+		defaultMessage: 'Sign in to manage your players.',
+	},
+	loading: { id: 'app.skin-site.profile-view.loading', defaultMessage: 'Loading players…' },
+	noPlayers: {
+		id: 'app.skin-site.profile-view.no-players',
+		defaultMessage: 'No players yet.',
+	},
+	selectHint: {
+		id: 'app.skin-site.profile-view.select-hint',
+		defaultMessage: 'Select a player to preview and edit its textures.',
+	},
+	skin: { id: 'app.skin-site.profile-view.skin', defaultMessage: 'Skin' },
+	cape: { id: 'app.skin-site.profile-view.cape', defaultMessage: 'Cape' },
+	elytra: { id: 'app.skin-site.profile-view.elytra', defaultMessage: 'Elytra' },
+	upload: { id: 'app.skin-site.profile-view.upload', defaultMessage: 'Upload' },
+	remove: { id: 'app.skin-site.profile-view.remove', defaultMessage: 'Remove' },
+	readonly: {
+		id: 'app.skin-site.profile-view.readonly',
+		defaultMessage: 'Mojang accounts are managed by Mojang; textures cannot be edited here.',
+	},
+	uploaded: { id: 'app.skin-site.profile-view.uploaded', defaultMessage: 'Texture updated.' },
+	removed: { id: 'app.skin-site.profile-view.removed', defaultMessage: 'Texture removed.' },
+	back: { id: 'app.skin-site.profile-view.back', defaultMessage: 'Back to home' },
+})
+const selectedId = ref<string | null>(null)
+const texture = ref<SkinSitePlayerSkin>({})
+const loadingTexture = ref(false)
+const uploading = ref<SkinTextureType | null>(null)
+
+const signedIn = computed(() => skinSiteStatus.value === 'signed-in' && !!skinSiteUser.value)
+const players = computed(() => skinSitePlayers.value)
+const playersLoading = computed(
+	() => skinSitePlayersStatus.value === 'checking' || skinSitePlayersStatus.value === 'idle',
+)
+const selectedPlayer = computed(
+	() => players.value.find((p) => p.uuid === selectedId.value) ?? null,
+)
+const editable = computed(() => !!selectedPlayer.value && !selectedPlayer.value.isMojang)
+
+const skinVariant = computed<'CLASSIC' | 'SLIM'>(() =>
+	texture.value.model === 'slim' ? 'SLIM' : 'CLASSIC',
+)
+
+function selectPlayer(id: string) {
+	selectedId.value = id
+}
+
+async function loadTexture(uuid: string) {
+	loadingTexture.value = true
+	texture.value = {}
+	try {
+		const result = await skinSitePlayerSkin(uuid)
+		if (result.success && result.payload) texture.value = result.payload
+	} catch (error) {
+		handleError(error)
+	} finally {
+		loadingTexture.value = false
+	}
+}
+
+watch(selectedId, (id) => {
+	if (id) void loadTexture(id)
+	else texture.value = {}
+})
+
+async function onUpload(type: SkinTextureType, event: Event) {
+	const input = event.target as HTMLInputElement
+	const file = input.files?.[0]
+	input.value = ''
+	if (!file || !selectedId.value) return
+	uploading.value = type
+	try {
+		const metadata: Record<string, string> = {}
+		if (type === 'SKIN') metadata.model = texture.value.model ?? 'default'
+		const result = await skinSiteUploadTexture(selectedId.value, file, type, metadata)
+		if (!result.success) {
+			handleError(new Error(result.errorMessage))
+			return
+		}
+		addNotification({ type: 'success', title: formatMessage(messages.uploaded) })
+		await loadTexture(selectedId.value)
+	} catch (error) {
+		handleError(error)
+	} finally {
+		uploading.value = null
+	}
+}
+
+async function removeTexture(type: SkinTextureType) {
+	if (!selectedId.value) return
+	uploading.value = type
+	try {
+		const result = await skinSiteDeleteTexture(selectedId.value, type)
+		if (!result.success) {
+			handleError(new Error(result.errorMessage))
+			return
+		}
+		addNotification({ type: 'success', title: formatMessage(messages.removed) })
+		await loadTexture(selectedId.value)
+	} catch (error) {
+		handleError(error)
+	} finally {
+		uploading.value = null
+	}
+}
+
+onMounted(() => {
+	if (signedIn.value) void requestSkinSitePlayers().catch(() => {})
+})
+
+watch(signedIn, (value) => {
+	if (value) void requestSkinSitePlayers().catch(() => {})
+})
+</script>
+<template>
+	<div class="flex flex-col gap-4">
+		<button
+			type="button"
+			class="flex w-fit items-center gap-1 rounded-full bg-button-bg px-3 py-1 text-xs font-semibold text-contrast hover:brightness-110"
+			@click="emit('back')"
+		>
+			← {{ formatMessage(messages.back) }}
+		</button>
+
+		<div v-if="!signedIn" class="rounded-2xl border border-solid border-surface-5 bg-bg-raised p-4">
+			<p class="m-0 text-sm text-secondary">{{ formatMessage(messages.signedOut) }}</p>
+		</div>
+
+		<div v-else class="grid grid-cols-1 gap-4 lg:grid-cols-[18rem_minmax(0,1fr)]">
+			<!-- Player list -->
+			<div
+				class="flex flex-col gap-2 rounded-2xl border border-solid border-surface-5 bg-bg-raised p-3"
+			>
+				<h3 class="m-0 text-base font-semibold text-contrast">
+					{{ formatMessage(messages.title) }}
+				</h3>
+
+				<div v-if="playersLoading" class="flex items-center gap-2 text-sm text-secondary">
+					<SpinnerIcon class="size-4 animate-spin" />
+					{{ formatMessage(messages.loading) }}
+				</div>
+				<p v-else-if="!players.length" class="m-0 text-sm text-secondary">
+					{{ formatMessage(messages.noPlayers) }}
+				</p>
+				<button
+					v-for="player in players"
+					:key="player.uuid"
+					type="button"
+					class="flex items-center gap-2 rounded-xl px-2 py-1.5 text-left transition-colors"
+					:class="
+						player.uuid === selectedId
+							? 'bg-brand-highlight text-contrast'
+							: 'bg-button-bg hover:brightness-110'
+					"
+					@click="selectPlayer(player.uuid)"
+				>
+					<Avatar
+						:src="player.headDataUrl"
+						:alt="player.name"
+						size="1.75rem"
+						pixelated
+						class="!rounded-md"
+					/>
+					<span class="min-w-0 flex-1 truncate text-sm font-medium">{{ player.name }}</span>
+					<span v-if="player.isMojang" class="shrink-0 text-[10px] uppercase text-secondary"
+						>Mojang</span
+					>
+				</button>
+			</div>
+
+			<!-- Preview + texture actions -->
+			<div
+				class="flex flex-col gap-4 rounded-2xl border border-solid border-surface-5 bg-bg-raised p-4"
+			>
+				<p v-if="!selectedPlayer" class="m-0 text-sm text-secondary">
+					{{ formatMessage(messages.selectHint) }}
+				</p>
+
+				<template v-else>
+					<div class="flex items-center gap-2">
+						<h3 class="m-0 text-base font-semibold text-contrast">{{ selectedPlayer.name }}</h3>
+						<span v-if="selectedPlayer.isMojang" class="text-xs text-secondary">Mojang</span>
+					</div>
+
+					<div class="relative h-80 w-full overflow-hidden rounded-xl bg-button-bg">
+						<div v-if="loadingTexture" class="absolute inset-0 flex items-center justify-center">
+							<SpinnerIcon class="size-6 animate-spin text-secondary" />
+						</div>
+						<SkinPreviewRenderer
+							v-else
+							:texture-src="texture.skin ?? ''"
+							:cape-src="texture.cape"
+							:variant="skinVariant"
+							:nametag="selectedPlayer.name"
+							:initial-rotation="Math.PI / 8"
+							class="size-full"
+						/>
+					</div>
+
+					<p v-if="!editable" class="m-0 text-xs text-secondary">
+						{{ formatMessage(messages.readonly) }}
+					</p>
+
+					<div v-else class="flex flex-col gap-2">
+						<div
+							v-for="entry in [
+								{ type: 'SKIN' as SkinTextureType, label: messages.skin, value: texture.skin },
+								{ type: 'CAPE' as SkinTextureType, label: messages.cape, value: texture.cape },
+								{
+									type: 'ELYTRA' as SkinTextureType,
+									label: messages.elytra,
+									value: texture.elytra,
+								},
+							]"
+							:key="entry.type"
+							class="flex items-center gap-2 rounded-xl bg-button-bg px-3 py-2"
+						>
+							<span class="min-w-0 flex-1 text-sm font-medium text-contrast">
+								{{ formatMessage(entry.label) }}
+							</span>
+							<span class="shrink-0 text-xs text-secondary">
+								{{ entry.value ? '✓' : '—' }}
+							</span>
+							<label
+								class="flex shrink-0 cursor-pointer items-center gap-1 rounded-full bg-brand px-3 py-1 text-xs font-semibold text-contrast"
+							>
+								<UploadIcon class="size-3" />
+								{{ formatMessage(messages.upload) }}
+								<input
+									type="file"
+									accept="image/png"
+									class="hidden"
+									:disabled="uploading !== null"
+									@change="(e) => onUpload(entry.type, e)"
+								/>
+							</label>
+							<button
+								v-if="entry.value"
+								type="button"
+								class="flex shrink-0 items-center gap-1 rounded-full bg-button-bg px-3 py-1 text-xs font-semibold text-red"
+								:disabled="uploading !== null"
+								@click="removeTexture(entry.type)"
+							>
+								<TrashIcon class="size-3" />
+								{{ formatMessage(messages.remove) }}
+							</button>
+						</div>
+					</div>
+				</template>
+			</div>
+		</div>
+	</div>
+</template>