fix: 修复后台文章计数为0 + 分类编辑补全描述字段 + CSP放行外部图片 + 更新关于页描述

- 文章管理：计数请求补 page=1 参数，命中分页接口返回正确的 total
- 分类管理：编辑模式新增描述输入框，保存时一并提交 description
- CSP：img-src 加入 https: 允许加载外部图片
- 关于页：数据存储描述从 JSON 文件更正为 SQLite 数据库
- Footer：添加 ICP 备案号

src/components/GsapReveal.tsx

@@ -16,6 +16,14 @@ interface GsapRevealProps {
   once?: boolean;
 }
 
+const VARIANTS = {
+  "fade-up": { y: 40, opacity: 0 },
+  "fade-in": { opacity: 0 },
+  "slide-left": { x: -40, opacity: 0 },
+  "slide-right": { x: 40, opacity: 0 },
+  scale: { scale: 0.92, opacity: 0 },
+} as const;
+
 export default function GsapReveal({
   children,
   variant = "fade-up",
@@ -28,25 +36,20 @@ export default function GsapReveal({
   const ref = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
-    if (!ref.current) return;
-
     const el = ref.current;
-    const children = el.children.length > 1 ? el.children : [el];
+    if (!el) return;
 
-    const variants = {
-      "fade-up": { y: 40, opacity: 0 },
-      "fade-in": { opacity: 0 },
-      "slide-left": { x: -40, opacity: 0 },
-      "slide-right": { x: 40, opacity: 0 },
-      scale: { scale: 0.92, opacity: 0 },
-    };
+    // 关键降级：尊重用户系统设置，无障碍优先，不做任何位移。
+    const reduceMotion = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
+    if (reduceMotion) return;
+
+    const targets = el.children.length > 1 ? Array.from(el.children) : [el];
 
     const ctx = gsap.context(() => {
-      if (stagger > 0 && children.length > 1) {
-        // Each child gets its own ScrollTrigger so off-screen items animate when scrolled into view
-        Array.from(children).forEach((child, i) => {
+      if (stagger > 0 && targets.length > 1) {
+        targets.forEach((child, i) => {
           gsap.from(child, {
-            ...variants[variant],
+            ...VARIANTS[variant],
             duration,
             delay: delay + i * stagger,
             ease: "power3.out",
@@ -58,8 +61,8 @@ export default function GsapReveal({
           });
         });
       } else {
-        gsap.from(children, {
-          ...variants[variant],
+        gsap.from(targets, {
+          ...VARIANTS[variant],
           duration,
           delay,
           ease: "power3.out",