fix(projects): isolate quote acceptance status per project (decision-target based)

Bug: a multi-project quote accepted for «تست ۱» only also appeared under «تست ۲»'s پذیرفته شده column, because both the Projects page and /projects/{id}/stats classified quotes by their GLOBAL status over any project link.

Rule now: a quote counts as accepted/arrived for a project ONLY if at least one non-rejected line item's decision targets that project (item_decisions.project_id). A quote merely linked as a candidate — including one accepted for a different project — is categorized exclusively under پیشنهاد شده for that project. Legacy quotes without any decision targets keep the old global-status classification.

Backend: project_stats membership now spans all link kinds (legacy mirror, quote_projects, line_item_projects, decision targets) with the per-project decision-based bucketing above; bucket VALUES follow the same isolation (accepted/arrived value counts only items targeting the project; candidate items of a still-proposal quote stay in the offered bucket); the raw path string is normalized to UUID for the Python-side comparisons. /quotes?project_id=… now matches any relevant link kind instead of only the legacy mirror column.

Frontend: ProjectsPage gains acceptedForProject/hasTargets helpers; the three columns (پیشنهاد شده / پذیرفته شده / رسیده) and their value chips use per-project items (target-project items first, then candidates), so totals no longer leak other projects' items.

Verified end-to-end (2 projects × 1 quote × 2 items, accept item-1 for P1 only): P1 accepted=1 then arrived=1 after the PM receipt; P2 stays offered=1 / accepted=0 / arrived=0 at every step; /quotes?project_id=P2 still lists the quote. All fixture data removed; 7/7 checks pass. python compile + api/frontend builds clean.

backend/app/routers/quotes.py

@@ -10,7 +10,16 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.db.engine import get_db
 from app.models.catalog import Material
-from app.models.procurement import ItemDecision, LineItem, Project, Quote, Supplier, Termsheet
+from app.models.procurement import (
+    ItemDecision,
+    LineItem,
+    LineItemProjects,
+    Project,
+    Quote,
+    QuoteProjects,
+    Supplier,
+    Termsheet,
+)
 from app.schemas.procurement import (
     AcceptQuoteIn,
     ArriveItemsIn,
@@ -111,7 +120,23 @@ async def list_quotes(
     if supplier_id:
         stmt = stmt.where(Quote.supplier_id == supplier_id)
     if project_id:
-        stmt = stmt.where(Quote.project_id == project_id)
+        # any relevant link: legacy mirror, quote-level junction, line-item
+        # candidates, or an accepted (decision) target — NOT just the mirror
+        stmt = stmt.where(
+            Quote.id.in_(
+                select(Quote.id)
+                .outerjoin(QuoteProjects, QuoteProjects.quote_id == Quote.id)
+                .outerjoin(LineItem, LineItem.quote_id == Quote.id)
+                .outerjoin(LineItemProjects, LineItemProjects.line_item_id == LineItem.id)
+                .outerjoin(ItemDecision, ItemDecision.line_item_id == LineItem.id)
+                .where(
+                    (Quote.project_id == project_id)
+                    | (QuoteProjects.project_id == project_id)
+                    | (LineItemProjects.project_id == project_id)
+                    | (ItemDecision.project_id == project_id)
+                )
+            )
+        )
     if category_id:
         stmt = stmt.where(_quote_category_exists(category_id))
     if quote_date_from is not None:

backend/app/services/quote_service.py

@@ -915,22 +915,45 @@ def _quote_has_category(category_id: UUID):
 
 
 async def project_stats(db: AsyncSession, project_id: UUID) -> dict:
-    """Counts + total value per quote status for one project.
+    """Counts + total value per quote status for ONE project, isolated per project.
 
-    total_value: SUM(quantity × unit_price) over line items using the chosen
-    termsheet link first, else the first link. Rejected line items are
-    excluded from value sums (contract P1-14).
+    A quote lands in this project's «accepted»/«arrived» bucket ONLY if at
+    least one non-rejected line item's decision targets this project
+    (item_decisions.project_id). A quote merely linked to the project as a
+    candidate (quote-level link, line-item candidates, or accepted for a
+    DIFFERENT project) stays in «offered» — this project never accepted it.
+
+    total_value: SUM(quantity × unit_price) over the bucket's line items,
+    using the chosen termsheet link first, else the first link. Rejected
+    line items are excluded from value sums (contract P1-14).
     """
     project = await db.get(Project, project_id)
     if project is None:
         raise NotFoundError("پروژه یافت نشد")
+    # the route passes the raw path string — normalize for the Python-side
+    # UUID comparisons below (decision.project_id == project_id etc.)
+    project_id = UUID(str(project_id))
 
-    quotes = (await db.execute(select(Quote).where(Quote.project_id == project_id))).scalars().all()
-    if not quotes:
+    # --- every quote RELEVANT to this project (any kind of link) ---
+    quote_id_rows = await db.execute(
+        select(Quote.id)
+        .outerjoin(QuoteProjects, QuoteProjects.quote_id == Quote.id)
+        .outerjoin(LineItem, LineItem.quote_id == Quote.id)
+        .outerjoin(LineItemProjects, LineItemProjects.line_item_id == LineItem.id)
+        .outerjoin(ItemDecision, ItemDecision.line_item_id == LineItem.id)
+        .where(
+            (Quote.project_id == project_id)
+            | (QuoteProjects.project_id == project_id)
+            | (LineItemProjects.project_id == project_id)
+            | (ItemDecision.project_id == project_id)
+        )
+    )
+    quote_ids = [row[0] for row in quote_id_rows.all()]
+    if not quote_ids:
         empty = {status: {"count": 0, "total_value": 0} for status in QUOTE_STATUSES}
         return {"project_id": str(project_id), "total_quotes": 0, **empty}
 
-    quote_ids = [q.id for q in quotes]
+    quotes = (await db.execute(select(Quote).where(Quote.id.in_(quote_ids)))).scalars().all()
     line_items = (await db.execute(select(LineItem).where(LineItem.quote_id.in_(quote_ids)))).scalars().all()
     li_ids = [li.id for li in line_items]
 
@@ -938,6 +961,18 @@ async def project_stats(db: AsyncSession, project_id: UUID) -> dict:
         d.line_item_id: d
         for d in (await db.execute(select(ItemDecision).where(ItemDecision.line_item_id.in_(li_ids)))).scalars().all()
     } if li_ids else {}
+    # line items explicitly linked to this project as candidates
+    candidate_li_ids = set(
+        (
+            await db.execute(
+                select(LineItemProjects.line_item_id).where(
+                    LineItemProjects.line_item_id.in_(li_ids),
+                    LineItemProjects.project_id == project_id,
+                )
+            )
+        ).scalars().all()
+    ) if li_ids else set()
+
     item_termsheets = (
         (await db.execute(select(ItemTermsheet).where(ItemTermsheet.line_item_id.in_(li_ids)))).scalars().all()
     ) if li_ids else []
@@ -946,12 +981,56 @@ async def project_stats(db: AsyncSession, project_id: UUID) -> dict:
     for it in item_termsheets:
         its_by_line.setdefault(it.line_item_id, []).append(it)
 
+    def _items_of(quote: Quote) -> list[LineItem]:
+        return [li for li in line_items if li.quote_id == quote.id]
+
+    def _accepted_for_project(quote: Quote) -> bool:
+        """≥1 non-rejected line item whose decision targets THIS project."""
+        return any(
+            (decision := decisions.get(li.id)) is not None
+            and decision.status == "chosen"
+            and decision.project_id == project_id
+            for li in _items_of(quote)
+        )
+
+    def _has_any_target(quote: Quote) -> bool:
+        """Whether any decision of this quote carries a target project at all
+        (legacy quotes accepted before the decision-project era have none —
+        they keep the old global-status classification)."""
+        return any(
+            (decisions.get(li.id) is not None and decisions[li.id].project_id is not None)
+            for li in _items_of(quote)
+        )
+
     per_status = {status: {"count": 0, "total_value": 0.0} for status in QUOTE_STATUSES}
     for q in quotes:
-        per_status[q.status]["count"] += 1
+        if q.status in ("accepted", "arrived") and _has_any_target(q) and not _accepted_for_project(q):
+            per_status["offered"]["count"] += 1  # linked, but never accepted for THIS project
+        else:
+            per_status[q.status]["count"] += 1
 
     for li in line_items:
+        quote = next(q for q in quotes if q.id == li.quote_id)
         decision = decisions.get(li.id)
+
+        # --- which status bucket does this line item's value belong to? ---
+        accepted_here = (
+            decision is not None
+            and decision.status == "chosen"
+            and decision.project_id == project_id
+        )
+        if quote.status in ("accepted", "arrived") and _has_any_target(quote):
+            if accepted_here:
+                bucket = quote.status
+            elif li.id in candidate_li_ids:
+                # the quote is still just a proposal for this project — the
+                # item's candidate value stays in the offered bucket
+                bucket = "offered"
+            else:
+                continue  # this item targets another project entirely
+        else:
+            bucket = quote.status
+
         if decision is not None and decision.status == "rejected":
             continue  # rejected items excluded from value sums
         if decision is not None and decision.chosen_item_termsheet_id is not None:
@@ -961,8 +1040,7 @@ async def project_stats(db: AsyncSession, project_id: UUID) -> dict:
             price_it = links[0] if links else None
         if price_it is None:
             continue
-        quote = next(q for q in quotes if q.id == li.quote_id)
-        per_status[quote.status]["total_value"] += float(price_it.unit_price * li.quantity)
+        per_status[bucket]["total_value"] += float(price_it.unit_price * li.quantity)
 
     result = {"project_id": str(project_id), "total_quotes": len(quotes)}
     for status, values in per_status.items():