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/ui/dialog/DialogContent.vue

@@ -0,0 +1,49 @@
+<template>
+  <DialogPortal>
+    <DialogOverlay />
+    <DialogContent
+      data-slot="dialog-content"
+      v-bind="{ ...$attrs, ...forwarded }"
+      :class="
+        cn(
+          'bg-background data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border p-6 shadow-lg duration-200 sm:max-w-lg',
+          props.class
+        )
+      "
+    >
+      <slot />
+
+      <DialogClose
+        v-if="showCloseButton"
+        data-slot="dialog-close"
+        class="ring-offset-background focus:ring-ring data-[state=open]:bg-accent data-[state=open]:text-muted-foreground absolute top-4 right-4 rounded-xs opacity-70 transition-opacity hover:opacity-100 focus:ring-2 focus:ring-offset-2 focus:outline-hidden disabled:pointer-events-none [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4"
+      >
+        <X />
+        <span class="sr-only">Close</span>
+      </DialogClose>
+    </DialogContent>
+  </DialogPortal>
+</template>
+
+<script setup lang="ts">
+  import type { DialogContentEmits, DialogContentProps } from 'reka-ui'
+  import type { HTMLAttributes } from 'vue'
+  import { reactiveOmit } from '@vueuse/core'
+  import { X } from 'lucide-vue-next'
+  import { DialogClose, DialogContent, DialogPortal, useForwardPropsEmits } from 'reka-ui'
+  import { cn } from '@/lib/utils'
+  import DialogOverlay from './DialogOverlay.vue'
+
+  defineOptions({
+    inheritAttrs: false
+  })
+
+  const props = withDefaults(defineProps<DialogContentProps & { class?: HTMLAttributes['class']; showCloseButton?: boolean }>(), {
+    showCloseButton: true
+  })
+  const emits = defineEmits<DialogContentEmits>()
+
+  const delegatedProps = reactiveOmit(props, 'class')
+
+  const forwarded = useForwardPropsEmits(delegatedProps, emits)
+</script>