feat(pump): link pump events to milk stock, fix expiry units

- PUMP modal: "Ajouter au stock" toggle with location selector
- Merge option: pick existing today's lot to add volume to (expiry kept)
- On save: POST new MilkStock or PATCH existing volume
- Milk page: expiry input now in hours/days/months per location
- Milk page: "soon" alert threshold scales per location (freezer=7d, fridge=24h, room=2h)

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

src/app/(app)/milk/page.tsx

@@ -37,7 +37,13 @@ function expiryStatus(stock: Stock): "expired" | "soon" | "ok" {
   const now = Date.now();
   const exp = new Date(stock.expiresAt).getTime();
   if (exp <= now) return "expired";
-  if (exp - now < 6 * 60 * 60 * 1000) return "soon"; // < 6h
+  // "soon" threshold scales with location: room <2h, fridge <24h, freezer <7d
+  const remaining = exp - now;
+  const soonMs =
+    stock.location === "freezer" ? 7 * 24 * 3600_000 :
+    stock.location === "fridge"  ? 24 * 3600_000 :
+    2 * 3600_000;
+  if (remaining < soonMs) return "soon";
   return "ok";
 }
 
@@ -51,7 +57,7 @@ export default function MilkPage() {
     volume: "",
     storedAt: localNowString(),
     notes: "",
-    expiryHours: "",
+    expiryCustom: "", // in hours (room), days (fridge), months (freezer)
   });
   const [saving, setSaving] = useState(false);
 
@@ -77,7 +83,13 @@ export default function MilkPage() {
     e.preventDefault();
     if (!selectedBaby) return;
     setSaving(true);
-    const expiryHours = form.expiryHours ? parseFloat(form.expiryHours) : undefined;
+    let expiryCustom: number | undefined;
+    if (form.expiryCustom) {
+      const v = parseFloat(form.expiryCustom);
+      if (location === "fridge") expiryCustom = v * 24;
+      else if (location === "freezer") expiryCustom = v * 24 * 30;
+      else expiryCustom = v;
+    }
     await fetch("/api/milk", {
       method: "POST",
       headers: { "Content-Type": "application/json" },
@@ -87,11 +99,11 @@ export default function MilkPage() {
         storedAt: form.storedAt,
         location,
         notes: form.notes || null,
-        expiryHours,
+        expiryCustom,
       }),
     });
     qc.invalidateQueries({ queryKey: ["milk"] });
-    setForm({ volume: "", storedAt: localNowString(), notes: "", expiryHours: "" });
+    setForm({ volume: "", storedAt: localNowString(), notes: "", expiryCustom: "" });
     setShowForm(false);
     setSaving(false);
   }
@@ -177,7 +189,7 @@ export default function MilkPage() {
                 return (
                   <button key={loc} type="button" onClick={() => {
                     setLocation(loc);
-                    setForm((f) => ({ ...f, expiryHours: "" }));
+                    setForm((f) => ({ ...f, expiryCustom: "" }));
                   }}
                     className={`flex-1 flex flex-col items-center gap-1 py-2 px-1 border rounded-xl text-xs font-medium transition ${
                       location === loc
@@ -191,7 +203,12 @@ export default function MilkPage() {
               })}
             </div>
             <p className="text-[10px] text-slate-400 dark:text-slate-500 mt-1">
-              Durée par défaut : {defaultExpiryHours >= 24 ? `${defaultExpiryHours / 24}j` : `${defaultExpiryHours}h`}
+              Durée par défaut :{" "}
+              {location === "freezer"
+                ? `${defaultExpiryHours / 24 / 30} mois`
+                : location === "fridge"
+                ? `${defaultExpiryHours / 24} jours`
+                : `${defaultExpiryHours}h`}
             </p>
           </div>
 
@@ -202,9 +219,19 @@ export default function MilkPage() {
                 required className={inputCls} placeholder="80" min="1" max="2000" />
             </div>
             <div>
-              <label className="block text-xs font-medium text-slate-600 dark:text-slate-400 mb-1.5">Durée péremption (h)</label>
+              <label className="block text-xs font-medium text-slate-600 dark:text-slate-400 mb-1.5">
-              <input type="number" value={form.expiryHours} onChange={(e) => setForm((f) => ({ ...f, expiryHours: e.target.value }))}
+                Péremption ({location === "freezer" ? "mois" : location === "fridge" ? "jours" : "heures"})
-                className={inputCls} placeholder={String(defaultExpiryHours)} min="1" />
+              </label>
+              <input
+                type="number"
+                value={form.expiryCustom}
+                onChange={(e) => setForm((f) => ({ ...f, expiryCustom: e.target.value }))}
+                className={inputCls}
+                placeholder={
+                  location === "freezer" ? "6" : location === "fridge" ? "4" : "4"
+                }
+                min="1"
+              />
             </div>
           </div>
 

src/components/event-modal.tsx

@@ -137,6 +137,12 @@ export function EventModal({ type, babyId, onClose, onSaved, initialEvent }: Pro
   const [milkStocks, setMilkStocks] = useState<MilkStock[]>([]);
   const [selectedStockId, setSelectedStockId] = useState<string | null>(null);
 
+  // Pump → stock state
+  const [addToStock, setAddToStock] = useState(false);
+  const [pumpStockLocation, setPumpStockLocation] = useState<"room" | "fridge" | "freezer">("fridge");
+  const [todayLots, setTodayLots] = useState<MilkStock[]>([]);
+  const [mergeLotId, setMergeLotId] = useState<string | null>(null);
+
   const selectedProfile = profiles.find((p) => p.id === selectedProfileId) ?? null;
 
   useEffect(() => {
@@ -150,6 +156,22 @@ export function EventModal({ type, babyId, onClose, onSaved, initialEvent }: Pro
     });
   }, [type, babyId]);
 
+  useEffect(() => {
+    if (type !== "PUMP") return;
+    fetch(`/api/milk?babyId=${babyId}`)
+      .then((r) => r.json())
+      .then((stocks) => {
+        if (!Array.isArray(stocks)) return;
+        const today = new Date().toDateString();
+        const lots = stocks.filter(
+          (s: MilkStock & { used?: boolean }) =>
+            !s.used && new Date(s.storedAt).toDateString() === today
+        );
+        lots.sort((a: MilkStock, b: MilkStock) => new Date(b.storedAt).getTime() - new Date(a.storedAt).getTime());
+        setTodayLots(lots);
+      });
+  }, [type, babyId]);
+
   useEffect(() => {
     if (type !== "BOTTLE") return;
     fetch(`/api/milk?babyId=${babyId}`)
@@ -327,6 +349,25 @@ export function EventModal({ type, babyId, onClose, onSaved, initialEvent }: Pro
         body: JSON.stringify({ used: true }),
       });
     }
+    if (type === "PUMP" && addToStock && form.pumpVolume && !isEditing) {
+      const vol = parseFloat(form.pumpVolume);
+      if (vol > 0) {
+        if (mergeLotId) {
+          const existing = todayLots.find((l) => l.id === mergeLotId);
+          await fetch(`/api/milk/${mergeLotId}`, {
+            method: "PATCH",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ volume: (existing?.volume ?? 0) + vol }),
+          });
+        } else {
+          await fetch("/api/milk", {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ babyId, volume: vol, location: pumpStockLocation }),
+          });
+        }
+      }
+    }
     setLoading(false);
     onSaved();
     onClose();
@@ -470,6 +511,58 @@ export function EventModal({ type, babyId, onClose, onSaved, initialEvent }: Pro
                 <input type="number" value={form.pumpVolume ?? ""} onChange={(e) => setForm((f) => ({ ...f, pumpVolume: e.target.value }))}
                   className={inputCls} placeholder="80" min="0" max="1000" />
               </div>
+              {!isEditing && (
+                <div className="border border-slate-200 dark:border-slate-600 rounded-xl overflow-hidden">
+                  <button
+                    type="button"
+                    onClick={() => setAddToStock((v) => !v)}
+                    className="w-full flex items-center justify-between px-3 py-2.5 text-sm font-medium text-slate-700 dark:text-slate-200 hover:bg-slate-50 dark:hover:bg-slate-700/50 transition"
+                  >
+                    <span>Ajouter au stock lait</span>
+                    <div className={`w-9 h-5 rounded-full transition-colors ${addToStock ? "bg-indigo-600" : "bg-slate-200 dark:bg-slate-600"} relative flex-shrink-0`}>
+                      <div className={`absolute top-0.5 w-4 h-4 rounded-full bg-white shadow transition-transform ${addToStock ? "translate-x-4" : "translate-x-0.5"}`} />
+                    </div>
+                  </button>
+                  {addToStock && (
+                    <div className="px-3 pb-3 pt-2 space-y-3 bg-slate-50 dark:bg-slate-800/60 border-t border-slate-100 dark:border-slate-700">
+                      <div>
+                        <label className="block text-xs font-medium text-slate-600 dark:text-slate-300 mb-1.5">Conservation</label>
+                        <div className="flex gap-2">
+                          {(["room", "fridge", "freezer"] as const).map((loc) => (
+                            <button key={loc} type="button" onClick={() => setPumpStockLocation(loc)}
+                              className={`${segmentBase} ${pumpStockLocation === loc ? segmentActive : segmentInactive}`}>
+                              {loc === "room" ? "Ambiant" : loc === "fridge" ? "Frigo" : "Congélo"}
+                            </button>
+                          ))}
+                        </div>
+                      </div>
+                      {todayLots.length > 0 && (
+                        <div>
+                          <label className="block text-xs font-medium text-slate-600 dark:text-slate-300 mb-1.5">Fusionner avec lot du jour</label>
+                          <div className="flex flex-col gap-1.5">
+                            <button type="button" onClick={() => setMergeLotId(null)}
+                              className={`flex items-center gap-2 px-3 py-2 rounded-lg border text-xs transition ${mergeLotId === null ? "border-indigo-500 bg-indigo-50 dark:bg-indigo-950 text-indigo-700 dark:text-indigo-300" : "border-slate-200 dark:border-slate-600 text-slate-500 dark:text-slate-400"}`}>
+                              Nouveau lot
+                            </button>
+                            {todayLots.map((lot) => (
+                              <button key={lot.id} type="button" onClick={() => setMergeLotId(lot.id)}
+                                className={`flex items-center gap-2 px-3 py-2 rounded-lg border text-xs transition ${mergeLotId === lot.id ? "border-indigo-500 bg-indigo-50 dark:bg-indigo-950 text-indigo-700 dark:text-indigo-300" : "border-slate-200 dark:border-slate-600 text-slate-500 dark:text-slate-400"}`}>
+                                {lot.volume} mL · {lot.location === "fridge" ? "frigo" : lot.location === "freezer" ? "congélo" : "ambiant"}
+                                {" · "}tirage {format(new Date(lot.storedAt), "HH:mm", { locale: fr })}
+                              </button>
+                            ))}
+                          </div>
+                          {mergeLotId && (
+                            <p className="text-[11px] text-indigo-500 mt-1.5">
+                              Volume sera ajouté à ce lot. Péremption inchangée.
+                            </p>
+                          )}
+                        </div>
+                      )}
+                    </div>
+                  )}
+                </div>
+              )}
             </div>
           )}