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.

backend/app/services/expand_service.py

@@ -77,13 +77,14 @@ def project_brief(project: Project | None) -> dict | None:
     return {"id": str(project.id), "name": project.name}
 
 
-def decision_brief(d: ItemDecision) -> dict:
+def decision_brief(d: ItemDecision, project: Project | None = None) -> dict:
     """Shape used inside expanded line items (P0-14)."""
     return {
         "id": str(d.id),
         "status": d.status,
         "chosen_item_termsheet_id": str(d.chosen_item_termsheet_id) if d.chosen_item_termsheet_id else None,
         "project_id": str(d.project_id) if d.project_id else None,  # v2.6: the single purchased project
+        "project": project_brief(project) if project is not None else None,
         "adjusted_unit_price": float(d.adjusted_unit_price) if d.adjusted_unit_price is not None else None,
         "decided_at": to_iso(d.decided_at),
     }
@@ -313,6 +314,7 @@ class _LineItemData:
         self.item_termsheets_by_line: dict[uuid.UUID, list[ItemTermsheet]] = {}
         self.item_termsheets_by_id: dict[uuid.UUID, ItemTermsheet] = {}
         self.projects_by_line: dict[uuid.UUID, list[Project]] = {}
+        self.projects_by_id: dict[uuid.UUID, Project] = {}
 
 
 async def _load_line_item_data(db: AsyncSession, line_items: list[LineItem], expand: set[str]) -> _LineItemData:
@@ -375,6 +377,13 @@ async def _load_line_item_data(db: AsyncSession, line_items: list[LineItem], exp
     if "decision" in expand or "receipt" in expand:
         decisions = (await db.execute(select(ItemDecision).where(ItemDecision.line_item_id.in_(li_ids)))).scalars().all()
         data.decisions = {d.line_item_id: d for d in decisions}
+        dec_proj_ids = {d.project_id for d in decisions if d.project_id is not None}
+        missing_pids = dec_proj_ids - set(proj_map.keys())
+        if missing_pids:
+            extra_projs = (await db.execute(select(Project).where(Project.id.in_(missing_pids)))).scalars().all()
+            for p in extra_projs:
+                proj_map[p.id] = p
+        data.projects_by_id = proj_map
         dec_ids = [d.id for d in decisions]
         if dec_ids:
             receipts = (await db.execute(select(ItemReceipt).where(ItemReceipt.item_decision_id.in_(dec_ids)))).scalars().all()
@@ -469,8 +478,10 @@ def _line_item_expanded(li: LineItem, expand: set[str], data: _LineItemData, inc
             data.specs_by_line.get(li.id, []), data.attr_defs, data.units, include_data_type=False
         )
     decision = data.decisions.get(li.id)
+    dec_proj = data.projects_by_id.get(decision.project_id) if decision and decision.project_id else None
+    d["target_project"] = project_brief(dec_proj) if dec_proj is not None else None
     if "decision" in expand:
-        d["decision"] = decision_brief(decision) if decision is not None else None
+        d["decision"] = decision_brief(decision, dec_proj) if decision is not None else None
         # chosen_item_termsheet_id یک id از جدول item_termsheets است؛ برای مقایسه با
         # termsheet_ids در جلوی برنامه، id ترم‌شیت واقعی هم ارسال می‌شود.
         if decision is not None and decision.chosen_item_termsheet_id is not None: