Add model-usage table to admin panel

app/main.py

@@ -111,6 +111,16 @@ async def api_overview(request: Request):
     return await portal_get("/admin/overview")
 
 
+@app.get("/api/model-usage")
+async def api_model_usage(request: Request):
+    if not is_admin(request):
+        return JSONResponse({"error": "forbidden"}, status_code=403)
+    try:
+        return await portal_get("/admin/model-usage")
+    except HTTPException as e:
+        return JSONResponse({"error": e.detail}, status_code=e.status_code)
+
+
 @app.post("/api/set-balance")
 async def api_set_balance(request: Request):
     if not is_admin(request):
@@ -257,6 +267,16 @@ PAGE_HTML = """<!DOCTYPE html>
     </thead>
     <tbody id="rows"><tr><td colspan="8" style="color:var(--muted)">Loading…</td></tr></tbody>
   </table>
+
+  <h2 style="margin:28px 0 12px;font-size:17px;font-weight:700;">Model usage</h2>
+  <table>
+    <thead>
+      <tr>
+        <th>Model</th><th>Spend</th><th>Tokens</th><th>Requests</th>
+      </tr>
+    </thead>
+    <tbody id="model-rows"><tr><td colspan="4" style="color:var(--muted)">Loading…</td></tr></tbody>
+  </table>
 </div>
 
 <script>
@@ -271,6 +291,30 @@ function flash(msg, ok) {
 
 function fmt(n) { return '$' + (Number(n) || 0).toFixed(2); }
 
+async function loadModels() {
+  try {
+    const r = await fetch('/api/model-usage');
+    if (r.status === 403) return;
+    const d = await r.json();
+    if (d.error) { $('model-rows').innerHTML = '<tr><td colspan="4" style="color:var(--muted)">' + esc(d.error) + '</td></tr>'; return; }
+    const models = d.models || [];
+    if (!models.length) {
+      $('model-rows').innerHTML = '<tr><td colspan="4" style="color:var(--muted)">No usage recorded.</td></tr>';
+      return;
+    }
+    $('model-rows').innerHTML = models.map(m =>
+      '<tr>' +
+      '<td>' + esc(m.model) + '</td>' +
+      '<td class="num">' + fmt(m.spend) + '</td>' +
+      '<td class="num">' + (m.tokens || 0).toLocaleString() + '</td>' +
+      '<td class="num">' + (m.requests || 0).toLocaleString() + '</td>' +
+      '</tr>'
+    ).join('');
+  } catch (e) {
+    $('model-rows').innerHTML = '<tr><td colspan="4" style="color:var(--muted)">Could not load model usage.</td></tr>';
+  }
+}
+
 async function load() {
   try {
     const r = await fetch('/api/overview');
@@ -330,6 +374,7 @@ async function addBalance(email) {
 }
 
 load();
+loadModels();
 </script>
 </body>
 </html>"""