Add Analyze Backlog button to WebUI

src/Predictalytics.Api/wwwroot/index.html

@@ -195,7 +195,10 @@
 
             <!-- Jobs Page -->
             <section class="page" id="page-jobs">
-                <h1 class="page-title">Background Jobs</h1>
+                <div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:24px;">
+                    <h1 class="page-title" style="margin-bottom:0">Background Jobs</h1>
+                    <button class="btn-sm" onclick="queueBacklogAnalysis()" style="padding:6px 16px; background:var(--accent); color:white; border:none; cursor:pointer; border-radius:4px;">Analyze Backlog (50)</button>
+                </div>
                 <div class="card">
                     <div class="table-wrap">
                         <table class="data-table">

src/Predictalytics.Api/wwwroot/js/app.js

@@ -616,5 +616,16 @@ async function queueTraderAnalysis(id) {
     }
 }
 
+async function queueBacklogAnalysis() {
+    const res = await fetch(`/api/jobs/analyze-backlog?take=50`, { method: 'POST' });
+    if (res.ok) {
+        const data = await res.json();
+        alert(`Successfully queued ${data.queued} traders for analysis from backlog.`);
+        loadJobs();
+    } else {
+        alert('Failed to queue backlog analysis.');
+    }
+}
+
 // Initialize Dashboard
 loadDashboard();