zerogpu warm move at boot; cpu-note ordering fix

app.py

@@ -75,8 +75,12 @@ def gpu_call(fn, *args):
     return out
 
 
-D.warmup()  # CPU warm-up: weights built at boot; ZeroGPU warm-up rides the first gpu_call
-
+D.warmup()  # CPU: weights built + kernels hot at boot
+if ZERO:
+    try:
+        gpu_call(D.warmup)   # first ZeroGPU attach: real-GPU warm move while the UI is still closed
+    except Exception as e:
+        print("ZeroGPU warm-up skipped:", type(e).__name__, e, flush=True)
 MODEL_KEYS = list(D.MODEL_REPOS)
 ANSWER_COLS = ["question", "answer", "confidence"]
 
@@ -104,6 +108,11 @@ NOTE = """> **Preview checkpoints: 17M and 32M parameters**, trained with RLCD o
 > multilingual input (0.23–0.28) — the tabs still run so you can *watch the calibration behave*,
 > but route real traffic to stronger checkpoints."""
 
+_NOTE_TAIL = ("\n>\n> **Running on CPU.** ZeroGPU could not attach a GPU for this"
+             " Space (`%s`), so answers take a few hundred milliseconds instead of"
+             " ~35 ms. Everything still works.") % _GPU_BROKEN["why"].split(":")[0]
+NOTE += _NOTE_TAIL
+
 
 def run_triage(model_key, message, tier, threshold):
     rows, action, r = gpu_call(D.triage, model_key, message, tier, threshold)