feat: 初始化项目结构与核心功能

引入项目基础目录结构，包含多语言支持、主要页面与组件、核心游戏逻辑、UI 组件库、加密与本地持久化、自动化 Docker 构建流程、GitHub issue 模板（中英文）、README（中英文）、LICENSE 及开发配置文件。实现 OGame 单机版主要功能模块，为后续开发和扩展奠定基础。

src/components/UnlockRequirement.vue

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+<template>
+  <div v-if="!isUnlocked" class="fixed inset-0 z-50 bg-background/80 backdrop-blur-sm flex items-center justify-center p-4">
+    <Card class="max-w-md w-full">
+      <CardHeader class="text-center">
+        <div class="flex justify-center mb-4">
+          <div class="rounded-full bg-muted p-4">
+            <Lock :size="48" class="text-muted-foreground" />
+          </div>
+        </div>
+        <CardTitle class="text-xl sm:text-2xl">{{ t('common.featureLocked') }}</CardTitle>
+        <CardDescription class="text-sm sm:text-base">{{ t('common.unlockRequired') }}</CardDescription>
+      </CardHeader>
+      <CardContent class="space-y-4">
+        <div class="p-4 bg-muted rounded-lg space-y-2">
+          <p class="text-sm font-medium text-center">{{ t('common.requiredBuilding') }}:</p>
+          <div class="flex items-center justify-center gap-2">
+            <span class="text-base sm:text-lg font-bold">{{ buildingName }}</span>
+            <Badge variant="default">Lv {{ requiredLevel }}</Badge>
+          </div>
+          <p v-if="currentLevel !== undefined" class="text-xs text-center text-muted-foreground">
+            {{ t('common.currentLevel') }}: Lv {{ currentLevel }}
+          </p>
+        </div>
+
+        <div class="flex gap-2">
+          <Button @click="goToBuildings" class="flex-1">
+            <Building2 :size="16" class="mr-2" />
+            {{ t('common.goToBuildings') }}
+          </Button>
+        </div>
+      </CardContent>
+    </Card>
+  </div>
+</template>
+
+<script setup lang="ts">
+  import { computed } from 'vue'
+  import { useRouter } from 'vue-router'
+  import { useGameStore } from '@/stores/gameStore'
+  import { useI18n } from '@/composables/useI18n'
+  import { useGameConfig } from '@/composables/useGameConfig'
+  import { BuildingType } from '@/types/game'
+  import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+  import { Button } from '@/components/ui/button'
+  import { Badge } from '@/components/ui/badge'
+  import { Lock, Building2 } from 'lucide-vue-next'
+
+  interface Props {
+    requiredBuilding: BuildingType
+    requiredLevel: number
+  }
+
+  const props = defineProps<Props>()
+  const router = useRouter()
+  const gameStore = useGameStore()
+  const { t } = useI18n()
+  const { BUILDINGS } = useGameConfig()
+
+  const buildingName = computed(() => BUILDINGS.value[props.requiredBuilding]?.name || props.requiredBuilding)
+
+  const currentLevel = computed(() => {
+    if (!gameStore.currentPlanet) return 0
+    return gameStore.currentPlanet.buildings[props.requiredBuilding] || 0
+  })
+
+  const isUnlocked = computed(() => {
+    return currentLevel.value >= props.requiredLevel
+  })
+
+  const goToBuildings = () => {
+    router.push('/buildings')
+  }
+</script>