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/pages/Dashboard/ArriveModal.tsx

@@ -3,7 +3,7 @@ import { toast } from "sonner";
 import { Package } from "lucide-react";
 import type { Quote } from "../../lib/types";
 import { useMaterials, useQuotes, useSuppliers, useUpdateQuote } from "../../hooks";
-import { activeItems, materialById, materialSpecs, supplierById } from "../../lib/quoteUtils";
+import { activeItems, formatMaterialTitle, materialById, supplierById } from "../../lib/quoteUtils";
 import { fmtNum } from "../../lib/formatters";
 import { groupCommas } from "../../lib/numutil";
 import { Button } from "../../components/ui/button";
@@ -86,7 +86,6 @@ export function ArriveModal({ quoteId, onClose }: ArriveModalProps) {
         <div className="flex flex-col gap-1.5">
           {items.map((li) => {
             const m = materialById(materials, li.material_id);
-            const specText = materialSpecs(m).join(" · ");
             return (
               <label key={li.id} className={`arrive-row${li.arrived_date ? " arrived" : ""}`}>
                 <input
@@ -102,8 +101,7 @@ export function ArriveModal({ quoteId, onClose }: ArriveModalProps) {
                 />
                 <span>
                   <Package className="me-1 inline h-3.5 w-3.5 text-muted" />
-                  {m.category} {m.brand}
-                  {specText ? ` · ${specText}` : ""}
+                  {formatMaterialTitle(m)}
                 </span>
                 <span className="arrive-meta">
                   {fmtNum(li.quantity)} {li.unit || ""} × {groupCommas(li.unit_price, true)}