feat(quotes): lock quotes with posted receipts; per-item target project + title dedup

Quotes that already have warehouse receipts can no longer be edited or rolled back:
- backend: quote_has_receipts() guard — replace_quote_children and every backward status transition now return 409 with «این پیشنهاد به‌دلیل ثبت رسید در انبار، غیرقابل ویرایش یا بازگشت است.»
- reopening to «offered» additionally clears item_decisions.project_id (the purchased-project link belongs to acceptance, not to a reopened offer)
- frontend EditModal: hasReceipts locks the whole form — disabled inputs and date pickers (JalaliDatePicker/NumberInput/MilestoneRow/MultiSelectCombobox gained disabled support), add/remove controls for items, termsheets and milestones hidden, status change blocked, amber warning banner; quote deletion now goes through a confirmation dialog (useDeleteQuote)
- date-only semantics: JalaliDatePicker keeps/emits YYYY-MM-DD when withTime=false (typing, «امروز», day selection) and toDateOnly no longer mangles pure date strings

Per-item target project (candidate projects stay intact):
- expand_service exposes the decision target project (decision.project + line_item.target_project)
- the accept payload derives item_decisions.project_id from that target project and sends item_projects: [] so line_item_projects keeps the original candidates untouched
- AcceptModal/EditModal select the target project per line item

Material titles:
- quoteUtils.formatMaterialTitle() composes one normalized, deduplicated «name + brand + specs» title, replacing materialLabel/materialSpecs/specsLabel usage across dashboard cards, quote detail and the modals

Verified: python compile + api/frontend image builds (tsc + vite) clean.

frontend/src/components/MultiSelectCombobox.tsx

@@ -12,6 +12,7 @@ export interface MultiSelectComboboxProps {
   className?: string;
   inputClassName?: string;
   allowCreate?: boolean; // اجازه‌ی تایپ مقدار جدید (پیش‌فرض true)
+  disabled?: boolean;
 }
 
 // چند-انتخابی خلاق (creatable multi-select) با چیپ‌ها:
@@ -27,6 +28,7 @@ export function MultiSelectCombobox({
   className,
   inputClassName,
   allowCreate = true,
+  disabled = false,
 }: MultiSelectComboboxProps) {
   const [text, setText] = useState("");
   const [open, setOpen] = useState(false);
@@ -105,46 +107,56 @@ export function MultiSelectCombobox({
   return (
     <div ref={ref} className={cn("relative", className)}>
       <div
-        className="flex min-h-9 w-full flex-wrap items-center gap-1 rounded-lg border border-line bg-panel px-2 py-1 shadow-sm transition-colors focus-within:ring-2 focus-within:ring-accent/40"
-        onClick={() => inputRef.current?.focus()}
+        className={cn(
+          "flex min-h-9 w-full flex-wrap items-center gap-1 rounded-lg border border-line bg-panel px-2 py-1 shadow-sm transition-colors focus-within:ring-2 focus-within:ring-accent/40",
+          disabled && "cursor-not-allowed opacity-60 bg-canvas/40",
+        )}
+        onClick={() => !disabled && inputRef.current?.focus()}
       >
         {values.map((v) => (
           <span key={v} className="spec-chip">
             <span className="max-w-[140px] truncate">{v}</span>
-            <button
-              type="button"
-              className="spec-chip-x"
-              title="حذف"
-              onClick={(e) => {
-                e.stopPropagation();
-                setPendingRemove(v);
-              }}
-            >
-              ×
-            </button>
+            {!disabled && (
+              <button
+                type="button"
+                className="spec-chip-x"
+                title="حذف"
+                onClick={(e) => {
+                  e.stopPropagation();
+                  setPendingRemove(v);
+                }}
+              >
+                ×
+              </button>
+            )}
           </span>
         ))}
         <input
           ref={inputRef}
           type="text"
+          disabled={disabled}
           className={cn(
-            "min-w-[80px] flex-1 border-0 bg-transparent px-0.5 py-0.5 text-[12px] text-ink caret-accent outline-none placeholder:text-muted",
+            "min-w-[80px] flex-1 border-0 bg-transparent px-0.5 py-0.5 text-[12px] text-ink caret-accent outline-none placeholder:text-muted disabled:cursor-not-allowed",
             inputClassName,
           )}
           value={text}
           placeholder={values.length ? "" : placeholder}
           autoComplete="off"
           onChange={(e) => {
+            if (disabled) return;
             setText(e.target.value);
             setHighlight(-1);
             setOpen(true);
           }}
-          onFocus={() => setOpen(true)}
-          onKeyDown={onKeyDown}
+          onFocus={() => !disabled && setOpen(true)}
+          onKeyDown={(e) => {
+            if (disabled) return;
+            onKeyDown(e);
+          }}
         />
       </div>
 
-      {open && (
+      {open && !disabled && (
         <div className="absolute inset-x-0 top-full z-30 mt-1 max-h-56 overflow-y-auto rounded-lg border border-line bg-panel py-1 shadow-lg">
           {listCount === 0 && (
             <div className="px-3 py-1.5 text-[12px] text-muted">