Speed up task activity load

routes/task_routes.py

@@ -894,10 +894,11 @@ def setup_task_routes(task_scheduler) -> APIRouter:
         return {"ok": True, "message": "Task stopped"}
 
     @router.get("/runs/recent")
-    async def list_recent_runs(request: Request, limit: int = 50):
+    async def list_recent_runs(request: Request, limit: int = 50, max_result_chars: int = 6000):
         """Recent task runs across ALL tasks for this owner. Drives the Activity view."""
         user = _owner(request)
         limit = max(1, min(limit, 200))
+        max_result_chars = max(500, min(max_result_chars, 20000))
         db = SessionLocal()
         try:
             q = db.query(TaskRun, ScheduledTask).join(
@@ -931,10 +932,20 @@ def setup_task_routes(task_scheduler) -> APIRouter:
                 deduped.append((r, t))
                 if len(deduped) >= limit:
                     break
+
+            def _clip_run(r: TaskRun) -> dict:
+                d = _run_to_dict(r)
+                for key in ("result", "error"):
+                    val = d.get(key)
+                    if isinstance(val, str) and len(val) > max_result_chars:
+                        d[key] = val[:max_result_chars].rstrip() + "\n\n[Activity preview truncated]"
+                return d
+
             return {
+                "has_more": len(rows) > len(deduped),
                 "runs": [
                     {
-                        **_run_to_dict(r),
+                        **_clip_run(r),
                         "task_name": _display_task_name(t),
                         "task_type": t.task_type or "llm",
                         "action": t.action,

static/js/tasks.js

@@ -2001,6 +2001,17 @@ async function _renderActivityView() {
       return;
     }
     list.innerHTML = _stackActivityEntries(filtered).map(_renderActivityEntry).join('');
+    if (_activityHasMore && !q) {
+      list.insertAdjacentHTML('beforeend', `
+        <button type="button" class="memory-toolbar-btn tasks-activity-load-more" id="tasks-activity-load-more" style="width:100%;justify-content:center;margin-top:6px;">
+          Load more
+        </button>
+      `);
+      list.querySelector('#tasks-activity-load-more')?.addEventListener('click', () => {
+        _activityLimit = Math.min(200, _activityLimit + 40);
+        _renderActivityView();
+      });
+    }
     _wireActivityRows(list);
   };
 
@@ -2060,10 +2071,11 @@ async function _renderActivityView() {
   }
 
   try {
-    const res = await fetch(`${API_BASE}/api/tasks/runs/recent?limit=100`, { credentials: 'same-origin' });
+    const res = await fetch(`${API_BASE}/api/tasks/runs/recent?limit=${_activityLimit}&max_result_chars=6000`, { credentials: 'same-origin' });
     if (!res.ok) throw new Error(`HTTP ${res.status}`);
     const data = await res.json();
     const runs = data.runs || [];
+    _activityHasMore = !!data.has_more && _activityLimit < 200;
     const list = document.getElementById('tasks-activity-list');
     if (!list) return;
     if (runs.length === 0) {
@@ -2105,6 +2117,8 @@ async function _renderActivityView() {
 }
 
 let _activityEntries = [];
+let _activityLimit = 40;
+let _activityHasMore = false;
 
 function _stackActivityEntries(entries) {
   const out = [];