feat(pos): set a per-item note on each cart line in POS v2

The cart store, order payload (create + add-items + offline), KDS ticket and
receipt already supported per-item notes — but POS v2 had no way to enter one.
Adds a note button on each cart line that toggles an inline input (e.g. "no
sugar"); the note shows highlighted when set and rides along to the kitchen/bar
ticket. No backend change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/dashboard/src/components/pos2/pos2-screen.tsx

@@ -13,7 +13,7 @@ import {
   Search, Plus, Minus, Trash2, Send, CreditCard, Pause, SplitSquareHorizontal,
   X, WifiOff, ShoppingCart, Users, Coffee, ArrowRight, LayoutGrid, Armchair,
   Banknote, Check, Delete, ReceiptText, ShoppingBag, Loader2, RotateCcw,
-  BadgePercent, Sparkles, Home,
+  BadgePercent, Sparkles, Home, StickyNote,
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { notify } from "@/lib/notify";
@@ -101,6 +101,7 @@ export function Pos2Screen() {
   const addItem = useCartStore((s) => s.addItem);
   const updateQty = useCartStore((s) => s.updateQty);
   const removeItem = useCartStore((s) => s.removeItem);
+  const setNotes = useCartStore((s) => s.setNotes);
   const setTableId = useCartStore((s) => s.setTableId);
   const setOrderType = useCartStore((s) => s.setOrderType);
   const hydrateFromOrder = useCartStore((s) => s.hydrateFromOrder);
@@ -320,6 +321,7 @@ export function Pos2Screen() {
     cafeId, lines: live, subtotal, discount, tax, total, count, pendingCount,
     onBump: (id: string, d: number) => { const l = items.find((x) => x.menuItem.id === id); if (l) updateQty(id, l.quantity + d); },
     onRemove: removeItem, onSend: send, onPay: openPay, onSplit: openPay,
+    onNote: (id: string, notes: string) => setNotes(id, notes),
   };
 
   // ── TABLE BOARD ────────────────────────────────────────────────────────────
@@ -669,15 +671,17 @@ function Pos2Extras({ cafeId }: { cafeId: string }) {
 }
 
 // ── Order ticket ─────────────────────────────────────────────────────────────
-type TicketLine = { menuItem: MenuItem; quantity: number };
+type TicketLine = { menuItem: MenuItem; quantity: number; notes?: string };
 function Ticket({
-  cafeId, lines, subtotal, discount, tax, total, count, pendingCount, onBump, onRemove, onSend, onPay, onSplit,
+  cafeId, lines, subtotal, discount, tax, total, count, pendingCount, onBump, onRemove, onNote, onSend, onPay, onSplit,
 }: {
   cafeId: string; lines: TicketLine[]; subtotal: number; discount: number; tax: number; total: number;
   count: number; pendingCount: number;
   onBump: (id: string, d: number) => void; onRemove: (id: string) => void;
+  onNote: (id: string, notes: string) => void;
   onSend: () => void; onPay: () => void; onSplit: () => void;
 }) {
+  const [noteFor, setNoteFor] = useState<string | null>(null);
   return (
     <div className="flex min-h-0 flex-1 flex-col">
       <div className="min-h-0 flex-1 overflow-y-auto p-3">
@@ -690,7 +694,8 @@ function Ticket({
         ) : (
           <ul className="space-y-2">
             {lines.map((l) => (
-              <li key={l.menuItem.id} className="flex items-center gap-2 rounded-xl border border-border/70 p-2">
+              <li key={l.menuItem.id} className="rounded-xl border border-border/70 p-2">
+                <div className="flex items-center gap-2">
                   <div className="min-w-0 flex-1">
                     <p className="line-clamp-1 font-medium">{l.menuItem.name}</p>
                     <p className="text-xs text-muted-foreground">{fmt(l.menuItem.price)} تومان</p>
@@ -704,9 +709,30 @@ function Ticket({
                       <Plus className="size-4" />
                     </button>
                   </div>
+                  <button
+                    type="button"
+                    onClick={() => setNoteFor((cur) => (cur === l.menuItem.id ? null : l.menuItem.id))}
+                    className={`flex size-9 items-center justify-center rounded-lg hover:bg-accent active:scale-95 ${l.notes ? "text-primary" : "text-muted-foreground"}`}
+                    aria-label="یادداشت"
+                    title="یادداشت آیتم"
+                  >
+                    <StickyNote className="size-4" />
+                  </button>
                   <button type="button" onClick={() => onRemove(l.menuItem.id)} className="flex size-9 items-center justify-center rounded-lg text-red-500 hover:bg-red-50" aria-label="حذف">
                     <Trash2 className="size-4" />
                   </button>
+                </div>
+                {noteFor === l.menuItem.id || l.notes ? (
+                  <input
+                    value={l.notes ?? ""}
+                    onChange={(e) => onNote(l.menuItem.id, e.target.value)}
+                    placeholder="یادداشت برای آشپزخانه (مثلاً بدون شکر)"
+                    autoFocus={noteFor === l.menuItem.id}
+                    maxLength={200}
+                    dir="rtl"
+                    className="mt-2 w-full rounded-lg border border-border/70 bg-background px-2.5 py-1.5 text-sm outline-none focus:border-primary"
+                  />
+                ) : null}
               </li>
             ))}
           </ul>