refactor: posts/show.html 内联 JS 拆分为独立文件

- 拆分 926 行内联 JS 为 5 个独立模块文件
- post-view.js: Vditor 渲染 + 提交审核按钮 (~50 行)
- post-energize.js: 赋能按钮 + 弹窗 (~76 行)
- post-reactions.js: 赞/踩系统 (~71 行)
- post-favorite.js: 收藏按钮 + 收藏夹弹窗 (~218 行)
- post-comments.js: 评论系统 (~456 行)
- show.html 从 1080 行缩减至 159 行

templates/MetaLab-2026/static/js/post-reactions.js

@@ -0,0 +1,71 @@
+// 赞/踩系统
+(function() {
+    var container = document.getElementById('postReactions');
+    var likeBtn = document.getElementById('likeBtn');
+    var dislikeBtn = document.getElementById('dislikeBtn');
+    var likesCountEl = document.getElementById('likesCount');
+    if (!container || !likeBtn || !dislikeBtn) return;
+
+    var postId = container.dataset.postId;
+
+    // 页面加载时获取当前反应状态
+    fetch('/api/posts/' + postId + '/reaction')
+        .then(function(r) { return r.json(); })
+        .then(function(d) {
+            if (!d.success || !d.data) return;
+            updateUI(d.data.reaction, d.data.likes_count);
+        })
+        .catch(function() {});
+
+    function updateUI(reaction, count) {
+        likeBtn.classList.remove('active');
+        dislikeBtn.classList.remove('active');
+        if (reaction === 'liked') likeBtn.classList.add('active');
+        if (reaction === 'disliked') dislikeBtn.classList.add('active');
+        if (typeof count === 'number') likesCountEl.textContent = count;
+    }
+
+    likeBtn.addEventListener('click', function() {
+        likeBtn.disabled = true;
+        fetch('/api/posts/' + postId + '/like', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': getCSRFToken() }
+        })
+        .then(function(r) {
+            if (r.status === 401) { window.location.href = '/auth/login?redirect=/posts/' + postId; return null; }
+            return r.json();
+        })
+        .then(function(d) {
+            likeBtn.disabled = false;
+            if (!d) return;
+            if (d.success) {
+                updateUI(d.data.liked ? 'liked' : 'none', d.data.likes_count);
+            } else {
+                alert(d.message || '操作失败');
+            }
+        })
+        .catch(function() { likeBtn.disabled = false; });
+    });
+
+    dislikeBtn.addEventListener('click', function() {
+        dislikeBtn.disabled = true;
+        fetch('/api/posts/' + postId + '/dislike', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': getCSRFToken() }
+        })
+        .then(function(r) {
+            if (r.status === 401) { window.location.href = '/auth/login?redirect=/posts/' + postId; return null; }
+            return r.json();
+        })
+        .then(function(d) {
+            dislikeBtn.disabled = false;
+            if (!d) return;
+            if (d.success) {
+                updateUI(d.data.disliked ? 'disliked' : 'none');
+            } else {
+                alert(d.message || '操作失败');
+            }
+        })
+        .catch(function() { dislikeBtn.disabled = false; });
+    });
+})();