merge: resolve conflicts with main, keep comprehensive chat pipeline

Resolved merge conflicts in agents.py and test_task_queue.py:
- Keep full chat-to-task pipeline (agent/priority extraction, question
  filtering, context injection) over simpler main version
- Incorporate test_briefing_task_queue_summary from main
- All 64 task queue tests pass

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_task_queue.py

@@ -545,3 +545,16 @@ class TestBuildQueueContext:
             ctx = _build_queue_context()
             assert isinstance(ctx, str)
             assert ctx == ""
+
+
+# ── Briefing Integration ──────────────────────────────────────────────────
+
+
+def test_briefing_task_queue_summary():
+    """Briefing engine should include task queue data."""
+    from task_queue.models import create_task
+    from timmy.briefing import _gather_task_queue_summary
+
+    create_task(title="Briefing integration test", created_by="test")
+    summary = _gather_task_queue_summary()
+    assert "pending" in summary.lower() or "task" in summary.lower()