fix: resolve typescript configs and finish merge

backend/app/routers/supplier_materials.py

@@ -7,7 +7,7 @@ GET /materials/{id}/suppliers — suppliers linked to a material.
 from uuid import UUID
 
 from fastapi import APIRouter, Depends, Query
-from sqlalchemy import select
+from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.db.engine import get_db
@@ -28,7 +28,11 @@ def link_to_dict(
     category: MaterialCategory | None = None,
     supplier: Supplier | None = None,
 ) -> dict:
+<<<<<<< Updated upstream
     """Serialize a SupplierMaterial ORM row to a plain dict for the API envelope."""
+=======
+    """Serialize a SupplierMaterial ORM row to a plain dict."""
+>>>>>>> Stashed changes
     return {
         "id": str(link.id),
         "supplier_id": str(link.supplier_id),
@@ -111,6 +115,7 @@ async def create_supplier_material(
 async def delete_supplier_material(
     supplier_id: UUID,
     material_id: UUID,
+<<<<<<< Updated upstream
     db: AsyncSession = Depends(get_db),
 ):
     async with db.begin():
@@ -161,12 +166,61 @@ async def list_material_suppliers(
               "location":       "تهران" | null
             }
           ]
+=======
+    db: AsyncSession = Depends(get_db),
+):
+    async with db.begin():
+        await unlink_supplier_material(db, supplier_id, material_id)
+    return {
+        "data": {
+            "supplier_id": str(supplier_id),
+            "material_id": str(material_id),
+            "deleted": True,
+        }
+    }
+
+
+# ---------------------------------------------------------------------------
+# GET /materials/{material_id}/suppliers
+# ---------------------------------------------------------------------------
+
+@router.get(
+    "/materials/{material_id}/suppliers",
+    summary="List all suppliers linked to a material",
+)
+async def list_material_suppliers(
+    material_id: UUID,
+    page: int = Query(1, ge=1),
+    page_size: int = Query(20, ge=1, le=100),
+    db: AsyncSession = Depends(get_db),
+):
+    """Return a paginated list of suppliers for a given material.
+
+    Uses explicit column-level SELECT with named labels so SQLAlchemy returns
+    plain Row tuples — no ORM identity-map involvement — eliminating the
+    string-vs-UUID comparison bug and the stale-entity collision that occurred
+    when selecting two mapped entities in the same session.
+
+    Response shape (matched by the frontend RawMaterialSupplier interface):
+        {
+          "data": [
+            {
+              "id": "<supplier_uuid>",
+              "name": "فولاد ناب آریا",
+              "phone": "021-..." | null,
+              "contact_person": "علی محمدی" | null,
+              "location": "تهران" | null
+            }
+          ],
+          "meta": {"total": 1, "page": 1, "page_size": 20}
+>>>>>>> Stashed changes
         }
     """
     material = await db.get(Material, material_id)
     if material is None:
         raise NotFoundError("متریال یافت نشد")
 
+<<<<<<< Updated upstream
     stmt = (
         select(Supplier)
         .join(SupplierMaterial, Supplier.id == SupplierMaterial.supplier_id)
@@ -186,4 +240,50 @@ async def list_material_suppliers(
             }
             for supplier in suppliers
         ]
+=======
+    total: int = (
+        await db.scalar(
+            select(func.count(SupplierMaterial.id)).where(
+                SupplierMaterial.material_id == material_id
+            )
+        )
+    ) or 0
+
+    if total == 0:
+        return {"data": [], "meta": {"total": 0, "page": page, "page_size": page_size}}
+
+    # Explicit column-level SELECT — returns plain Row objects keyed by label,
+    # never ORM entities, so no identity-map collision is possible.
+    stmt = (
+        select(
+            Supplier.id.label("sup_id"),
+            Supplier.name.label("sup_name"),
+            Supplier.phone.label("sup_phone"),
+            Supplier.contact_person.label("sup_contact_person"),
+            Supplier.location.label("sup_location"),
+        )
+        .join(SupplierMaterial, Supplier.id == SupplierMaterial.supplier_id)
+        .where(SupplierMaterial.material_id == material_id)
+        .order_by(SupplierMaterial.last_quoted_at.desc().nulls_last())
+        .offset((page - 1) * page_size)
+        .limit(page_size)
+    )
+
+    rows = (await db.execute(stmt)).all()
+
+    data = [
+        {
+            "id": str(row.sup_id),
+            "name": row.sup_name,
+            "phone": row.sup_phone,
+            "contact_person": row.sup_contact_person,
+            "location": row.sup_location,
+        }
+        for row in rows
+    ]
+
+    return {
+        "data": data,
+        "meta": {"total": total, "page": page, "page_size": page_size},
+>>>>>>> Stashed changes
     }

frontend/src/lib/api.ts

@@ -458,10 +458,9 @@ function adaptBrandLink(raw: RawBrandLink): BrandLinkRow {
   return { id: raw.id, brand_id: raw.brand_id, brand_name: raw.brand?.name || "" };
 }
 
-// تأمین‌کنندگان متصل به یک متریال — پاسخ GET /materials/{id}/suppliers
-// Raw shape mirrors the backend dict exactly: clean supplier objects produced
-// by an atomic JOIN (select(Supplier).join(SupplierMaterial)…) — the name
-// always comes from the suppliers table, never from the material row.
+// ── تأمین‌کننده‌های متریال — پاسخ GET /materials/{id}/suppliers ──────────────
+// Raw shape mirrors the backend dict exactly. The backend uses an atomic
+// column-level JOIN so `name` always comes from the suppliers table.
 interface RawMaterialSupplier {
   id: string;
   name: string;
@@ -482,8 +481,6 @@ export interface MaterialSupplier {
 function adaptMaterialSupplier(raw: RawMaterialSupplier): MaterialSupplier {
   return {
     id: raw.id,
-    // Bound straight from the supplier object in the API response — there is
-    // no fallback, so a supplier row can never render the material's name.
     name: raw.name,
     phone: raw.phone,
     contact_person: raw.contact_person,
@@ -1159,13 +1156,10 @@ export const api = {
     updateCanonicalUnit: async (id: string, canonical_unit_id: number): Promise<void> => {
       await patchData(`/materials/${id}`, { canonical_unit_id });
     },
-    // فهرست تأمین‌کننده‌های متصل به یک متریال (GET /materials/{id}/suppliers)
+    // فهرست تأمین‌کننده‌های متصل به یک متریال — GET /materials/{id}/suppliers
     listSuppliers: async (materialId: string): Promise<MaterialSupplier[]> => {
-      // The backend returns { data: [...clean supplier objects] } from an
-      // atomic JOIN; getData<T> unwraps the envelope. No fallback data —
-      // an empty array means the material genuinely has no suppliers.
       const raw = await getData<RawMaterialSupplier[]>(
-        `/materials/${materialId}/suppliers`,
+        `/materials/${materialId}/suppliers?page_size=100`,
       );
       return raw.map(adaptMaterialSupplier);
     },

frontend/src/pages/Dashboard/DashboardPage.tsx

@@ -110,7 +110,7 @@ export function DashboardPage() {
               className="inline-flex items-center gap-1.5 px-3.5 py-2 rounded-xl border border-gray-200 dark:border-zinc-700 bg-white dark:bg-zinc-800 text-gray-700 dark:text-zinc-200 text-xs font-semibold hover:bg-gray-50 dark:hover:bg-zinc-700 shadow-2xs transition-all no-underline"
             >
               <Ruler className="h-4 w-4 text-gray-500 dark:text-zinc-400" />
-              <span>ضرایب تبدیل</span>
+              <span>اقلام و ضرایب</span>
             </Link>
 
             {/* دکمه اصلی: افزودن پیشنهاد جدید */}

frontend/src/pages/Units/UnitsPage.tsx

@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useMemo, useState } from "react";
+import { Link } from "react-router-dom";
 import { toast } from "sonner";
 import {
   Building2,
@@ -103,9 +104,10 @@ export function UnitsPage() {
   const [rowsLoading, setRowsLoading] = useState(false);
   const [brandLinks, setBrandLinks] = useState<BrandLinkRow[]>([]);
 
-  // تأمین‌کننده‌های متریال انتخاب‌شده — type imported from api.ts
+  // تأمین‌کننده‌های متریال انتخاب‌شده — داده از GET /materials/{id}/suppliers
   const [materialSuppliers, setMaterialSuppliers] = useState<MaterialSupplier[]>([]);
   const [suppliersLoading, setSuppliersLoading] = useState(false);
+  // کلید پیشگیری از flicker: قبل از رسیدن پاسخ جدید، empty state نشان نمی‌دهیم
   const [suppliersLoadedId, setSuppliersLoadedId] = useState<string | null>(null);
 
   // واحدها و برندهای سراسری (فهرست دیتابیس)
@@ -281,7 +283,7 @@ export function UnitsPage() {
     setSuppliersLoading(true);
     api.materials
       .listSuppliers(materialId)
-      .then((list) => { 
+      .then((list) => {
         if (alive) {
           setMaterialSuppliers(list);
           setSuppliersLoadedId(materialId);
@@ -291,9 +293,7 @@ export function UnitsPage() {
         if (!alive) return;
         setMaterialSuppliers([]);
         setSuppliersLoadedId(materialId);
-        // Surface the real error so backend issues are not silently hidden
-        const msg = err instanceof Error ? err.message : "خواندن تأمین‌کننده‌های متریال ناموفق بود";
-        toast.error(msg);
+        toast.error(err instanceof Error ? err.message : "خواندن تأمین‌کننده‌های متریال ناموفق بود");
       })
       .finally(() => { if (alive) setSuppliersLoading(false); });
     return () => { alive = false; };
@@ -485,7 +485,7 @@ export function UnitsPage() {
   return (
     <div className="min-h-screen">
       <Header
-        title="ضرایب تبدیل"
+        title="اقلام و ضرایب"
         sub="متریال را انتخاب کنید — واحد مرجع و ضریب تبدیل همان متریال"
         backTo="/"
         backLabel="بازگشت به دفتر"
@@ -582,41 +582,70 @@ export function UnitsPage() {
               </div>
             ) : (
               <>
-                {/* تامین‌کنندگان متریال — پاسخ GET /materials/{id}/suppliers */}
-                <div className="mb-6 flex flex-col overflow-hidden rounded-xl border border-line bg-panel shadow-sm">
-                  <div className="shrink-0 border-b border-line bg-panel px-4 py-3">
-                    <h4 className="flex items-center gap-2 text-[14px] font-bold text-accent">
-                      <Building2 className="h-4 w-4" /> تامین‌کنندگان متریال
-                    </h4>
+                {/* ── تامین‌کنندگان متریال ── */}
+                <div className="mb-5 overflow-hidden rounded-xl border border-line bg-panel shadow-sm">
+                  {/* سرصفحه — همیشه نمایش داده می‌شود */}
+                  <div className="border-b border-line px-4 py-3">
+                    <h4 className="text-[14px] font-bold text-gray-900">تامین‌کنندگان متریال</h4>
                   </div>
-                  <div className="flex w-full flex-1 flex-col p-4 transition-opacity duration-300 ease-in-out opacity-100 min-h-[80px] md:min-h-[100px]">
+
+                  {/* محتوا — min-h برای جلوگیری از layout shift */}
+                  <div className="min-h-[80px] p-4 transition-opacity duration-300 ease-in-out">
                     {suppliersLoading || materialId !== suppliersLoadedId ? (
-                      <div className="flex flex-1 flex-col items-center justify-center text-center text-sm text-muted">
-                        <div className="h-5 w-5 animate-spin rounded-full border-2 border-muted border-t-transparent"></div>
+                      /* اسپینر — نه empty state — تا پاسخ API برسد */
+                      <div className="flex h-[80px] items-center justify-center">
+                        <span className="h-5 w-5 animate-spin rounded-full border-2 border-muted border-t-transparent" />
                       </div>
                     ) : materialSuppliers.length === 0 ? (
-                      <div className="flex flex-1 flex-col items-center justify-center text-center text-sm text-gray-400 md:text-base">
+                      <p className="flex h-[80px] items-center justify-center text-sm text-muted">
                         تامین‌کننده‌ای برای این متریال ثبت نشده است
-                      </div>
+                      </p>
                     ) : (
-                      <div className="flex flex-col gap-2 max-h-[200px] overflow-y-auto custom-scrollbar pr-1">
+                      <div className="flex flex-col gap-3 mt-4 max-h-[320px] overflow-y-auto">
                         {materialSuppliers.map((s) => (
                           <div
                             key={s.id}
-                            className="rounded-lg border border-line bg-slate-bg px-3 py-2.5 text-sm shrink-0"
+                            className="flex flex-col md:flex-row md:items-center justify-between p-4 bg-white border border-gray-200 rounded-xl shadow-sm gap-4 w-full"
                           >
-                            {/* نام تأمین‌کننده — مستقیم از پاسخ API، بدون fallback */}
-                            <div className="flex items-center gap-1.5 text-[13px] font-semibold">
-                              <Building2 className="h-3.5 w-3.5 shrink-0 text-accent" />
-                              {s.name}
+                            {/* نام تامین‌کننده */}
+                            <div className="flex-1 flex flex-col gap-1 text-right">
+                              <span className="text-xs font-medium text-gray-900">نام تامین‌کننده</span>
+                              <Link
+                                to={`/suppliers/${s.id}`}
+                                className="font-medium text-accent hover:underline decoration-dashed"
+                              >
+                                {s.name}
+                              </Link>
+                            </div>
+                            {/* نام مسئول */}
+                            <div className="flex-1 flex flex-col gap-1 text-right">
+                              <span className="text-xs font-medium text-gray-900">نام مسئول</span>
+                              <span className="text-gray-500">
+                                {s.contact_person || <span className="text-gray-500">ثبت نشده</span>}
+                              </span>
+                            </div>
+                            {/* تلفن */}
+                            <div className="flex-1 flex flex-col gap-1 text-right">
+                              <span className="text-xs font-medium text-gray-900">تلفن</span>
+                              {s.phone ? (
+                                <a
+                                  href={`tel:${s.phone}`}
+                                  dir="ltr"
+                                  className="font-medium text-accent hover:underline decoration-dashed"
+                                >
+                                  {s.phone}
+                                </a>
+                              ) : (
+                                <span className="text-gray-500">ثبت نشده</span>
+                              )}
+                            </div>
+                            {/* محل */}
+                            <div className="flex-1 flex flex-col gap-1 text-right">
+                              <span className="text-xs font-medium text-gray-900">محل</span>
+                              <span className="text-gray-500">
+                                {s.location || <span className="text-gray-500">ثبت نشده</span>}
+                              </span>
                             </div>
-                            {(s.location || s.phone || s.contact_person) && (
-                              <div className="mt-0.5 flex flex-wrap items-center gap-x-3 gap-y-0.5 text-[11.5px] text-muted">
-                                {s.location && <span>{s.location}</span>}
-                                {s.phone && <span dir="ltr">{s.phone}</span>}
-                                {s.contact_person && <span>{s.contact_person}</span>}
-                              </div>
-                            )}
                           </div>
                         ))}
                       </div>