feat(ai): 打通 SEO 闭环与投稿写作辅助

对齐 Zibll 的 AI 生成 SEO 流程：统一 WP AI Client/主题 Provider 双后端、文章/分类 SEO 框与生成回填、投稿摘要/标签建议，并收敛扩展页为连接配置。

assets/js/front-submit.js

@@ -13,6 +13,9 @@
   var i18n = (window.aksrtSubmitData && window.aksrtSubmitData.i18n) || {};
   var ajaxUrl = (window.aksrtSubmitData && window.aksrtSubmitData.ajaxUrl) || '/wp-admin/admin-ajax.php';
   var nonce = (window.aksrtSubmitData && window.aksrtSubmitData.nonce) || '';
+  var restUrl = ((window.aksrtSubmitData && window.aksrtSubmitData.restUrl) || '/wp-json/aksrt/v1').replace(/\/$/, '');
+  var restNonce = (window.aksrtSubmitData && window.aksrtSubmitData.restNonce) || '';
+  var aiCfg = (window.aksrtSubmitData && window.aksrtSubmitData.ai) || {};
 
   var FRONT_SUBMIT = {
     form: null,
@@ -31,6 +34,7 @@
       this.bindCoverPreview();
       this.bindWordCount();
       this.bindLeaveWarning();
+      this.bindAiAssist();
     },
 
     /**
@@ -351,6 +355,112 @@
       contentEl.addEventListener('input', updateCount);
       updateCount();
     },
+
+    /**
+     * AI 摘要 / 标签辅助（仅建议回填，不自动提交）
+     */
+    bindAiAssist: function () {
+      var self = this;
+      if (!aiCfg.available) return;
+
+      var buttons = this.form.querySelectorAll('.aksrt-ai-assist-btn');
+      if (!buttons.length) return;
+
+      buttons.forEach(function (btn) {
+        btn.hidden = false;
+        btn.addEventListener('click', function (e) {
+          e.preventDefault();
+          var action = btn.getAttribute('data-ai-action');
+          if (action === 'summary') self.runAiSummary(btn);
+          if (action === 'tags') self.runAiTags(btn);
+        });
+      });
+    },
+
+    getSubmitContent: function () {
+      var titleEl = document.getElementById('submit-title');
+      var contentEl = document.getElementById('submit-content');
+      return {
+        title: titleEl ? titleEl.value.trim() : '',
+        content: contentEl ? contentEl.value.trim() : '',
+      };
+    },
+
+    runAiSummary: function (btn) {
+      var data = this.getSubmitContent();
+      if (!data.content) {
+        alert(i18n.needContent || '请先填写正文内容');
+        return;
+      }
+      this.aiRequest(btn, '/ai/summary-suggest', {
+        title: data.title,
+        content: data.content,
+        max_length: 200,
+      }, function (payload) {
+        var summary = payload && payload.summary ? String(payload.summary) : '';
+        var el = document.getElementById('submit-excerpt');
+        if (el && summary) {
+          el.value = summary;
+          el.dispatchEvent(new Event('input', { bubbles: true }));
+        }
+      });
+    },
+
+    runAiTags: function (btn) {
+      var data = this.getSubmitContent();
+      if (!data.content && !data.title) {
+        alert(i18n.needContent || '请先填写正文内容');
+        return;
+      }
+      this.aiRequest(btn, '/ai/tags-suggest', {
+        title: data.title,
+        content: data.content,
+      }, function (payload) {
+        var tags = payload && Array.isArray(payload.tags) ? payload.tags : [];
+        var el = document.getElementById('submit-tags');
+        if (el && tags.length) {
+          el.value = tags.join(', ');
+          el.dispatchEvent(new Event('input', { bubbles: true }));
+        }
+      });
+    },
+
+    aiRequest: function (btn, path, body, onSuccess) {
+      if (btn.getAttribute('data-loading') === '1') return;
+      var original = btn.textContent;
+      btn.setAttribute('data-loading', '1');
+      btn.textContent = i18n.aiGenerating || '生成中…';
+
+      fetch(restUrl + path, {
+        method: 'POST',
+        credentials: 'same-origin',
+        headers: {
+          'Content-Type': 'application/json',
+          'X-WP-Nonce': restNonce,
+        },
+        body: JSON.stringify(body || {}),
+      })
+        .then(function (r) {
+          return r.json().then(function (json) {
+            return { ok: r.ok, json: json };
+          });
+        })
+        .then(function (res) {
+          btn.removeAttribute('data-loading');
+          btn.textContent = original;
+          if (!res.ok || !res.json || res.json.success === false) {
+            var msg = (res.json && res.json.message) || i18n.aiFailed || 'AI 生成失败';
+            alert(msg);
+            return;
+          }
+          onSuccess(res.json.data || {});
+        })
+        .catch(function () {
+          btn.removeAttribute('data-loading');
+          btn.textContent = original;
+          alert(i18n.aiFailed || 'AI 生成失败');
+        });
+    },
   };
 
   if (document.readyState === 'loading') {