feat(@vben/web-antd): Lottie 品牌加载动画（主题色自适应）

- 新增全局 loading：自定义 apps/web-antd/loading.html 覆盖 inject-app-loading
  的默认模板，Vue 挂载前就能播放品牌动画
- 新增 LottieLoading 组件，用于 SSO 回调等"白屏时间偏长"的运行时场景
- 换色方案：Lottie JSON 里原本 5 档硬编码绿色，按当前主题 colorPrimary
  生成 5 档 HSL 亮度做指纹替换。挂载前从 localStorage preferences 读色，
  挂载后读 CSS 变量 --primary，两条路径共用 public/lottie-theme-patch.js
  一份 classic-JS 源，window.__LottieThemePatch__ 上暴露
- vite 插件：启动/构建时从 node_modules 把 lottie_light.min.js 拷到
  public/ 供 loading.html <script> 加载；.gitignore 排除该产物
- LottieLoading 复用 loading.html 已经挂好的 window.lottie，不再把
  ~170KB 播放器再打进 Vue 产物

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web-antd/loading.html

@@ -0,0 +1,89 @@
+<style data-app-loading="inject-css">
+  html {
+    /* same as ant-design-vue/dist/reset.css setting */
+    line-height: 1.15;
+  }
+
+  .loading {
+    position: fixed;
+    top: 0;
+    left: 0;
+    z-index: 9999;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+    background-color: #f4f7f9;
+  }
+
+  .loading.hidden {
+    visibility: hidden;
+    pointer-events: none;
+    opacity: 0;
+    transition: all 0.8s ease-out;
+  }
+
+  .dark .loading {
+    background: #0d0d10;
+  }
+
+  .title {
+    margin-top: 24px;
+    font-family:
+      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
+      Arial, sans-serif !important;
+    font-size: 24px;
+    font-weight: 600 !important;
+    color: rgb(0 0 0 / 85%) !important;
+  }
+
+  .dark .title {
+    color: #fff !important;
+  }
+
+  /* stylelint-disable-next-line selector-id-pattern -- 与 inject-app-loading 的 #__app-loading__ 保持相同命名风格 */
+  #__app-loading-lottie__ {
+    width: 220px;
+    height: 220px;
+  }
+</style>
+<div class="loading" id="__app-loading__">
+  <div id="__app-loading-lottie__"></div>
+  <div class="title"><%= VITE_APP_TITLE %></div>
+</div>
+<!--
+  换色逻辑与 src/components/lottie-loading/LottieLoading.vue 共用同一份
+  classic-JS 源（window.__LottieThemePatch__），避免两处硬编码漂移。
+-->
+<script src="/lottie-theme-patch.js"></script>
+<script src="/lottie_light.min.js"></script>
+<script>
+  (function () {
+    var tp = window.__LottieThemePatch__;
+    var container = document.getElementById('__app-loading-lottie__');
+    if (!tp || !container || typeof lottie === 'undefined') return;
+    fetch('/loading.json')
+      .then(function (r) {
+        return r.json();
+      })
+      .then(function (data) {
+        var hsl = tp.readPrimaryHslFromLocalStorage(
+          '<%= VITE_APP_NAMESPACE %>-',
+        );
+        tp.patchColors(data, tp.buildShades(hsl));
+        lottie.loadAnimation({
+          container: container,
+          renderer: 'svg',
+          loop: true,
+          autoplay: true,
+          animationData: data,
+        });
+      })
+      .catch(function (e) {
+        console.error('[app-loading] lottie error', e);
+      });
+  })();
+</script>