fix(hub): simplify AI coach header actions

Hide model name labels and style New Chat as a primary button matching Generate Summary.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/app.js

@@ -2939,7 +2939,6 @@
     showToast("已添加一行，请填写 URL 后点「保存设置」");
   };
 
-  let aiMeta = null;
   let aiSummaryLoading = false;
   let aiChatLoading = false;
   let aiChatSessionCache = null;
@@ -3129,17 +3128,6 @@
     if (input) input.disabled = busy;
   }
 
-  async function loadAiMeta() {
-    const r = await apiFetch("/api/ai/meta");
-    aiMeta = await r.json();
-    const sm = document.getElementById("ai-summary-meta");
-    const cm = document.getElementById("ai-chat-meta");
-    const label = aiMeta && aiMeta.model ? aiMeta.model : "";
-    if (sm) sm.textContent = label;
-    if (cm) cm.textContent = label;
-    return aiMeta;
-  }
-
   async function loadAiSummary() {
     const body = document.getElementById("ai-summary-body");
     try {
@@ -3149,10 +3137,6 @@
       if (latest && latest.content_md) {
         if (body) setAiSummaryMarkdown(body, latest.content_md, latest.stats_snapshot);
         renderAiSummaryStats(latest.stats_snapshot);
-        const sm = document.getElementById("ai-summary-meta");
-        if (sm && latest.generated_at) {
-          sm.textContent = `${j.model || ""} · ${latest.generated_at}`;
-        }
       }
     } catch (e) {
       if (body) setAiSummaryPlaceholder(body, `<p class="ai-placeholder">${esc(String(e))}</p>`);
@@ -3167,7 +3151,6 @@
   }
 
   async function loadAiPage() {
-    await loadAiMeta();
     await Promise.all([loadAiSummary(), loadAiChatSession()]);
   }