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/QuoteDetail.tsx

@@ -3,13 +3,11 @@ import { Package, Scale, CreditCard, CalendarDays, Paperclip, Building2, Ban } f
 import type { Attachment, Quote, Store } from "../../lib/types";
 import { api } from "../../lib/api";
 import {
+  formatMaterialTitle,
   itemTermsheetIds,
   lineItemTotal,
   materialById,
-  materialLabel,
-  materialSpecs,
   refConverted,
-  specsLabel,
 } from "../../lib/quoteUtils";
 import { fmtDate, fmtDateTime, fmtNum } from "../../lib/formatters";
 import { groupCommas } from "../../lib/numutil";
@@ -69,7 +67,6 @@ export function QuoteDetail({ store, q }: QuoteDetailProps) {
     const total = lineItemTotal(li);
     const projs = itemProjects(q, li);
     const conv = isRejected ? null : refConverted(store, li);
-    const specText = specsLabel(materialSpecs(m));
 
     // رسید جزیی → قلم به دو بخش «رسید شده» و «در راه» شکسته می‌شود (نمایشی):
     // مجموع دو بخش همیشه با تعداد/مبلغ اصلی برابر است (عدم تغییر جمع کل پیشنهاد).
@@ -97,8 +94,7 @@ export function QuoteDetail({ store, q }: QuoteDetailProps) {
       >
         <div className="fb-name">
           <Package className="me-1 inline h-3 w-3 text-muted" />
-          {materialLabel(m)}
-          {specText ? ` · ${specText}` : ""}
+          {formatMaterialTitle(m)}
         </div>
         <div className="fb-meta">
           <Building2 className="me-1 inline h-3 w-3" /> {projs.length ? projs.join("، ") : "—"}