improvement(wrapped): 清理主题系统，Wrapped 固定 Modern

- 移除 useWrappedTheme 与主题切换入口（仅保留 Modern 视觉）

- 封面/卡片/年份选择器/热力图等组件去掉 Win98/Gameboy/DOS 分支与样式

- 删除 themedHeatColor、CRT/像素字体相关样式，降低维护成本

frontend/components/wrapped/shared/WrappedCardShell.vue

@@ -1,5 +1,5 @@
 <template>
-  <div v-if="variant === 'panel'" class="window bg-white rounded-2xl border border-[#EDEDED] overflow-hidden">
+  <div v-if="variant === 'panel'" class="bg-white rounded-2xl border border-[#EDEDED] overflow-hidden">
     <div class="px-6 py-5 border-b border-[#F3F3F3]">
       <div class="flex items-start justify-between gap-4">
         <div>
@@ -20,58 +20,24 @@
 
   <!-- Slide 模式：单张卡片占据全页面，背景由外层（年度总结）统一控制 -->
   <section v-else class="relative h-full w-full overflow-hidden">
-    <div :class="slideContainerClass">
-      <!-- Win98：把整页内容包进一个“窗口” -->
-      <div v-if="isWin98" class="window w-full flex-1 flex flex-col overflow-hidden">
-        <div class="title-bar">
-          <div class="title-bar-text">
-            <img class="title-bar-icon" src="/assets/images/windows-0.png" alt="" aria-hidden="true" />
-            <span>{{ title }}</span>
-          </div>
-          <div class="title-bar-controls" aria-hidden="true">
-            <button type="button" aria-label="Minimize" tabindex="-1"></button>
-            <button type="button" aria-label="Maximize" tabindex="-1"></button>
-            <button type="button" aria-label="Close" tabindex="-1"></button>
-          </div>
-        </div>
-
-        <div class="window-body flex-1 flex flex-col min-h-0">
-          <slot name="narrative">
-            <p v-if="narrative" class="wrapped-body text-sm sm:text-base whitespace-pre-wrap">
-              {{ narrative }}
-            </p>
-          </slot>
-
-          <div class="mt-4 flex-1 min-h-0 overflow-auto">
-            <div class="w-full">
-              <slot />
-            </div>
-          </div>
-        </div>
-      </div>
-
-      <!-- 其他主题：保持原样 -->
-      <template v-else>
+    <div class="relative h-full max-w-5xl mx-auto px-6 py-10 sm:px-8 sm:py-12 flex flex-col">
         <div class="flex items-start justify-between gap-4">
           <div>
-            <h2 class="wrapped-title text-[#000000e6]" :class="slideTitleClass">{{ title }}</h2>
-            <div :class="slideNarrativeWrapClass">
-              <slot name="narrative">
-                <p v-if="narrative" class="mt-3 wrapped-body text-sm sm:text-base text-[#7F7F7F] max-w-2xl whitespace-pre-wrap">
-                  {{ narrative }}
-                </p>
-              </slot>
-            </div>
+            <h2 class="wrapped-title text-2xl sm:text-3xl text-[#000000e6]">{{ title }}</h2>
+            <slot name="narrative">
+              <p v-if="narrative" class="mt-3 wrapped-body text-sm sm:text-base text-[#7F7F7F] max-w-2xl whitespace-pre-wrap">
+                {{ narrative }}
+              </p>
+            </slot>
           </div>
           <slot name="badge" />
         </div>
 
-        <div class="flex-1 flex items-center" :class="slideContentWrapClass">
+        <div class="flex-1 flex items-center mt-6 sm:mt-8">
           <div class="w-full">
             <slot />
           </div>
         </div>
-      </template>
     </div>
   </section>
 </template>
@@ -83,62 +49,4 @@ defineProps({
   narrative: { type: String, default: '' },
   variant: { type: String, default: 'panel' } // 'panel' | 'slide'
 })
-
-const { theme } = useWrappedTheme()
-const isWin98 = computed(() => theme.value === 'win98')
-const isGameboy = computed(() => theme.value === 'gameboy')
-const isCompactSlide = computed(() => isGameboy.value)
-
-const slideTitleClass = computed(() => (
-  isCompactSlide.value ? 'text-xl sm:text-2xl' : 'text-2xl sm:text-3xl'
-))
-
-// Keep as a computed so we can tune per-theme spacing later without touching template.
-const slideNarrativeWrapClass = computed(() => '')
-
-const slideContentWrapClass = computed(() => (
-  isCompactSlide.value ? 'mt-4 sm:mt-5' : 'mt-6 sm:mt-8'
-))
-
-const slideContainerClass = computed(() => (
-  isWin98.value
-    ? 'relative h-full max-w-5xl mx-auto px-6 pt-2 pb-4 sm:px-8 sm:pt-3 sm:pb-6 flex flex-col'
-    : (isCompactSlide.value
-      ? 'relative h-full max-w-5xl mx-auto px-6 pt-5 pb-6 sm:px-8 sm:pt-6 sm:pb-7 flex flex-col'
-      : 'relative h-full max-w-5xl mx-auto px-6 py-10 sm:px-8 sm:py-12 flex flex-col')
-))
 </script>
-
-<style>
-/* ========== Game Boy 主题 ========== */
-
-/* 卡片背景 */
-.wrapped-theme-gameboy .bg-white {
-  background: #9bbc0f !important;
-  border-color: #306230 !important;
-}
-
-/* 标题 */
-.wrapped-theme-gameboy .wrapped-title {
-  color: #0f380f !important;
-  font-family: var(--font-pixel-10), 'Courier New', monospace;
-}
-
-/* 描述文字 */
-.wrapped-theme-gameboy .wrapped-body {
-  color: #306230 !important;
-}
-
-/* 数字高亮 */
-.wrapped-theme-gameboy .wrapped-number {
-  color: #0f380f !important;
-  font-family: var(--font-pixel-10), 'Courier New', monospace;
-}
-
-/* 边框 */
-.wrapped-theme-gameboy .border-\[\#EDEDED\],
-.wrapped-theme-gameboy .border-\[\#F3F3F3\] {
-  border-color: #306230 !important;
-}
-
-</style>