diff --git a/backend/app/db/init_db.py b/backend/app/db/init_db.py
index 018ff34..789872a 100644
--- a/backend/app/db/init_db.py
+++ b/backend/app/db/init_db.py
@@ -174,7 +174,7 @@ _V26_DDL = [
     """,
     """
     DO $$ BEGIN
-        CREATE TYPE user_role AS ENUM ('pm', 'procurement_manager', 'admin');
+        CREATE TYPE user_role AS ENUM ('pm', 'procurement_manager', 'admin', 'supervisor');
     EXCEPTION WHEN duplicate_object THEN NULL; END $$
     """,
     """
diff --git a/backend/app/models/procurement.py b/backend/app/models/procurement.py
index f41b355..3860c87 100644
--- a/backend/app/models/procurement.py
+++ b/backend/app/models/procurement.py
@@ -26,7 +26,7 @@ from app.db.base import Base
 from app.models.catalog import Material, Unit, _timestamptz, _uuid_pk
 
 user_role_enum = Enum(
-    "pm", "procurement_manager", "admin",
+    "pm", "procurement_manager", "admin", "supervisor",
     name="user_role", native_enum=True,
 )
 quote_status_enum = Enum(
diff --git a/backend/app/routers/attribute_definitions.py b/backend/app/routers/attribute_definitions.py
index 8e0c0ad..6124262 100644
--- a/backend/app/routers/attribute_definitions.py
+++ b/backend/app/routers/attribute_definitions.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import AttributeDefinition, MaterialAttributeValue, Unit
 from app.models.procurement import LineItemSpec
@@ -13,6 +14,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/attribute-definitions", tags=["attribute-definitions"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def attr_def_to_dict(ad: AttributeDefinition, unit: Unit | None = None) -> dict:
@@ -69,7 +71,11 @@ async def list_attribute_definitions(
 
 
 @router.post("", status_code=201)
-async def create_attribute_definition(payload: AttributeDefinitionCreate, db: AsyncSession = Depends(get_db)):
+async def create_attribute_definition(
+    payload: AttributeDefinitionCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     duplicate = await db.scalar(select(AttributeDefinition.id).where(AttributeDefinition.attribute_key == payload.attribute_key))
     if duplicate is not None:
         raise ConflictError("ویژگی با این attribute_key قبلاً ثبت شده است", field="attribute_key")
@@ -102,7 +108,10 @@ async def get_attribute_definition(
 
 @router.patch("/{definition_id}")
 async def update_attribute_definition(
-    definition_id, payload: AttributeDefinitionUpdate, db: AsyncSession = Depends(get_db)
+    definition_id,
+    payload: AttributeDefinitionUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     ad = await db.get(AttributeDefinition, definition_id)
     if ad is None:
@@ -136,7 +145,11 @@ async def update_attribute_definition(
 
 
 @router.delete("/{definition_id}")
-async def delete_attribute_definition(definition_id, db: AsyncSession = Depends(get_db)):
+async def delete_attribute_definition(
+    definition_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     ad = await db.get(AttributeDefinition, definition_id)
     if ad is None:
         raise NotFoundError("تعریف ویژگی یافت نشد")
diff --git a/backend/app/routers/brand_materials.py b/backend/app/routers/brand_materials.py
index 1200f96..13f96d8 100644
--- a/backend/app/routers/brand_materials.py
+++ b/backend/app/routers/brand_materials.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import Brand, BrandMaterial, Material
 from app.models.procurement import LineItem
@@ -12,6 +13,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/brand-materials", tags=["brand-materials"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def bm_to_dict(bm: BrandMaterial, expand: set[str] = frozenset()) -> dict:
@@ -70,7 +72,11 @@ async def list_brand_materials(
 
 
 @router.post("", status_code=201)
-async def create_brand_material(payload: BrandMaterialCreate, db: AsyncSession = Depends(get_db)):
+async def create_brand_material(
+    payload: BrandMaterialCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     if await db.get(Brand, payload.brand_id) is None:
         raise NotFoundError("برند یافت نشد", field="brand_id")
     if await db.get(Material, payload.material_id) is None:
@@ -107,7 +113,12 @@ async def get_brand_material(bm_id, expand: str | None = None, db: AsyncSession
 
 
 @router.patch("/{bm_id}")
-async def update_brand_material(bm_id, payload: BrandMaterialUpdate, db: AsyncSession = Depends(get_db)):
+async def update_brand_material(
+    bm_id,
+    payload: BrandMaterialUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     bm = await db.get(BrandMaterial, bm_id)
     if bm is None:
         raise NotFoundError("ارتباط برند-متریال یافت نشد")
@@ -120,7 +131,11 @@ async def update_brand_material(bm_id, payload: BrandMaterialUpdate, db: AsyncSe
 
 
 @router.delete("/{bm_id}")
-async def delete_brand_material(bm_id, db: AsyncSession = Depends(get_db)):
+async def delete_brand_material(
+    bm_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     bm = await db.get(BrandMaterial, bm_id)
     if bm is None:
         raise NotFoundError("ارتباط برند-متریال یافت نشد")
diff --git a/backend/app/routers/brands.py b/backend/app/routers/brands.py
index 9173c48..1112cc0 100644
--- a/backend/app/routers/brands.py
+++ b/backend/app/routers/brands.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import Brand, BrandMaterial
 from app.schemas.catalog import BrandCreate, BrandUpdate
@@ -11,6 +12,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/brands", tags=["brands"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def brand_to_dict(brand: Brand) -> dict:
@@ -42,7 +44,11 @@ async def list_brands(
 
 
 @router.post("", status_code=201)
-async def create_brand(payload: BrandCreate, db: AsyncSession = Depends(get_db)):
+async def create_brand(
+    payload: BrandCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     rows = (await db.execute(select(Brand).where(Brand.name == payload.name))).scalars().all()
     if any(b.country == payload.country for b in rows):
         raise ConflictError("برندی با این نام و کشور قبلاً ثبت شده است")
@@ -61,7 +67,12 @@ async def get_brand(brand_id, db: AsyncSession = Depends(get_db)):
 
 
 @router.patch("/{brand_id}")
-async def update_brand(brand_id, payload: BrandUpdate, db: AsyncSession = Depends(get_db)):
+async def update_brand(
+    brand_id,
+    payload: BrandUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     brand = await db.get(Brand, brand_id)
     if brand is None:
         raise NotFoundError("برند یافت نشد")
@@ -79,7 +90,11 @@ async def update_brand(brand_id, payload: BrandUpdate, db: AsyncSession = Depend
 
 
 @router.delete("/{brand_id}")
-async def delete_brand(brand_id, db: AsyncSession = Depends(get_db)):
+async def delete_brand(
+    brand_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     brand = await db.get(Brand, brand_id)
     if brand is None:
         raise NotFoundError("برند یافت نشد")
diff --git a/backend/app/routers/files.py b/backend/app/routers/files.py
index 791dd16..ea5b4ac 100644
--- a/backend/app/routers/files.py
+++ b/backend/app/routers/files.py
@@ -29,9 +29,10 @@ from app.utils.preview_token import make_preview_token, verify_preview_token
 
 router = APIRouter(prefix="/quotes", tags=["files"])
 
-# حذف پیوست‌ها = عملیات تدارکات (ادمین / مدیر تدارکات)؛ بارگذاری و دانلود
+# حذف و بارگذاری پیوست‌ها = عملیات تدارکات (ادمین / مدیر تدارکات)؛ دانلود
 # برای هر کاربر واردشده آزاد است.
 _attachment_deleter = require_role("procurement_manager", "admin")
+_attachment_writer = require_role("procurement_manager", "admin")
 
 ALLOWED_MIME_TYPES = {
     "image/png", "image/jpeg", "image/webp", "image/gif", "application/pdf",
@@ -125,7 +126,7 @@ async def _attachment_or_404(
 # Invoice — قابل بارگذاری در هر وضعیتی (از صفحه‌ی ویرایش)
 # ---------------------------------------------------------------------------
 
-@router.post("/{quote_id}/invoice", status_code=201, dependencies=[Depends(get_current_user)])
+@router.post("/{quote_id}/invoice", status_code=201, dependencies=[Depends(_attachment_writer)])
 async def upload_invoice(quote_id: uuid.UUID, file: UploadFile = File(...), db: AsyncSession = Depends(get_db)):
     await _quote_or_404(db, quote_id)
     mime = _validate_upload(file)
@@ -208,7 +209,7 @@ async def delete_invoice(quote_id: uuid.UUID, attachment_id: uuid.UUID, db: Asyn
 # Proforma — no status restriction
 # ---------------------------------------------------------------------------
 
-@router.post("/{quote_id}/proforma", status_code=201, dependencies=[Depends(get_current_user)])
+@router.post("/{quote_id}/proforma", status_code=201, dependencies=[Depends(_attachment_writer)])
 async def upload_proforma(quote_id: uuid.UUID, file: UploadFile = File(...), db: AsyncSession = Depends(get_db)):
     await _quote_or_404(db, quote_id)
     mime = _validate_upload(file)
diff --git a/backend/app/routers/item_receipts.py b/backend/app/routers/item_receipts.py
index f29254e..12d2d6d 100644
--- a/backend/app/routers/item_receipts.py
+++ b/backend/app/routers/item_receipts.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.procurement import ItemDecision, ItemReceipt, LineItem
 from app.schemas.procurement import ReceiptCreate, ReceiptUpdate
@@ -14,6 +15,7 @@ router = APIRouter(
     prefix="/quotes/{quote_id}/line-items/{line_item_id}/receipt",
     tags=["item-receipts"],
 )
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _line_item_or_404(db: AsyncSession, quote_id, line_item_id) -> LineItem:
@@ -45,7 +47,13 @@ async def get_receipt(quote_id, line_item_id, db: AsyncSession = Depends(get_db)
 
 
 @router.post("", status_code=201)
-async def create_receipt(quote_id, line_item_id, payload: ReceiptCreate, db: AsyncSession = Depends(get_db)):
+async def create_receipt(
+    quote_id,
+    line_item_id,
+    payload: ReceiptCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     await _line_item_or_404(db, quote_id, line_item_id)
     decision = await _decision_or_404(db, line_item_id)
     existing = await db.scalar(select(ItemReceipt).where(ItemReceipt.item_decision_id == decision.id))
@@ -65,7 +73,13 @@ async def create_receipt(quote_id, line_item_id, payload: ReceiptCreate, db: Asy
 
 
 @router.patch("")
-async def update_receipt(quote_id, line_item_id, payload: ReceiptUpdate, db: AsyncSession = Depends(get_db)):
+async def update_receipt(
+    quote_id,
+    line_item_id,
+    payload: ReceiptUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     await _line_item_or_404(db, quote_id, line_item_id)
     decision = await db.scalar(select(ItemDecision).where(ItemDecision.line_item_id == line_item_id))
     if decision is None:
diff --git a/backend/app/routers/item_termsheets.py b/backend/app/routers/item_termsheets.py
index 2d2977c..701e25c 100644
--- a/backend/app/routers/item_termsheets.py
+++ b/backend/app/routers/item_termsheets.py
@@ -7,6 +7,7 @@ from fastapi import APIRouter, Depends
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.procurement import (
     ItemDecision,
@@ -23,6 +24,7 @@ router = APIRouter(
     prefix="/quotes/{quote_id}/line-items/{line_item_id}/termsheets",
     tags=["item-termsheets"],
 )
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _line_item_or_404(db: AsyncSession, quote_id, line_item_id) -> LineItem:
@@ -58,7 +60,11 @@ async def list_item_termsheets(quote_id, line_item_id, db: AsyncSession = Depend
 
 @router.post("", status_code=201)
 async def create_item_termsheet(
-    quote_id, line_item_id, payload: ItemTermsheetCreate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    line_item_id,
+    payload: ItemTermsheetCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     async with db.begin():
         li = await _line_item_or_404(db, quote_id, line_item_id)
@@ -93,7 +99,12 @@ async def create_item_termsheet(
 
 @router.patch("/{item_termsheet_id}")
 async def update_item_termsheet(
-    quote_id, line_item_id, item_termsheet_id, payload: ItemTermsheetUpdate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    line_item_id,
+    item_termsheet_id,
+    payload: ItemTermsheetUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     li = await _line_item_or_404(db, quote_id, line_item_id)
     quote = await db.get(Quote, quote_id)
@@ -114,7 +125,11 @@ async def update_item_termsheet(
 
 @router.delete("/{item_termsheet_id}")
 async def delete_item_termsheet(
-    quote_id, line_item_id, item_termsheet_id, db: AsyncSession = Depends(get_db)
+    quote_id,
+    line_item_id,
+    item_termsheet_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     it = await db.scalar(
         select(ItemTermsheet).where(ItemTermsheet.id == item_termsheet_id, ItemTermsheet.line_item_id == line_item_id)
diff --git a/backend/app/routers/line_item_specs.py b/backend/app/routers/line_item_specs.py
index 9f49e95..a00f535 100644
--- a/backend/app/routers/line_item_specs.py
+++ b/backend/app/routers/line_item_specs.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import AttributeDefinition, Unit
 from app.models.procurement import LineItem, LineItemSpec, Quote
@@ -12,6 +13,7 @@ from app.services.eav_service import flatten_eav_values
 from app.utils.errors import ConflictError, NotFoundError
 
 router = APIRouter(prefix="/quotes/{quote_id}/line-items/{line_item_id}/specs", tags=["line-item-specs"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _line_item_or_404(db: AsyncSession, quote_id, line_item_id) -> LineItem:
@@ -53,7 +55,13 @@ async def get_line_item_specs(quote_id, line_item_id, db: AsyncSession = Depends
 
 
 @router.put("")
-async def put_line_item_specs(quote_id, line_item_id, payload: SpecsPutIn, db: AsyncSession = Depends(get_db)):
+async def put_line_item_specs(
+    quote_id,
+    line_item_id,
+    payload: SpecsPutIn,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     """FULL replacement — specs not in the payload are DELETED (P1-19)."""
     async with db.begin():
         li = await _line_item_or_404(db, quote_id, line_item_id)
diff --git a/backend/app/routers/line_items.py b/backend/app/routers/line_items.py
index 963d1f5..e9f6c79 100644
--- a/backend/app/routers/line_items.py
+++ b/backend/app/routers/line_items.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import Material, Unit
 from app.models.procurement import ItemDecision, LineItem, Quote
@@ -14,6 +15,7 @@ from app.utils.errors import ConflictError, NotFoundError
 from app.utils.pagination import paginate, sort_query
 
 router = APIRouter(prefix="/quotes/{quote_id}/line-items", tags=["line-items"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _quote_or_404(db: AsyncSession, quote_id) -> Quote:
@@ -50,7 +52,12 @@ async def list_line_items(
 
 
 @router.post("", status_code=201)
-async def create_line_item(quote_id, payload: LineItemCreate, db: AsyncSession = Depends(get_db)):
+async def create_line_item(
+    quote_id,
+    payload: LineItemCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     async with db.begin():
         quote = await _quote_or_404(db, quote_id)
         if quote.status != "offered":
@@ -89,7 +96,11 @@ async def get_line_item(
 
 @router.patch("/{line_item_id}")
 async def update_line_item(
-    quote_id, line_item_id, payload: LineItemUpdate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    line_item_id,
+    payload: LineItemUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     li = await _line_item_or_404(db, quote_id, line_item_id)
     quote = await _quote_or_404(db, quote_id)
@@ -131,7 +142,12 @@ async def update_line_item(
 
 
 @router.delete("/{line_item_id}")
-async def delete_line_item(quote_id, line_item_id, db: AsyncSession = Depends(get_db)):
+async def delete_line_item(
+    quote_id,
+    line_item_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     li = await _line_item_or_404(db, quote_id, line_item_id)
     quote = await _quote_or_404(db, quote_id)
     if quote.status != "offered":
diff --git a/backend/app/routers/material_categories.py b/backend/app/routers/material_categories.py
index 8611a74..ccd4ce5 100644
--- a/backend/app/routers/material_categories.py
+++ b/backend/app/routers/material_categories.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import MaterialCategory
 from app.models.procurement import Supplier
@@ -12,6 +13,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/material-categories", tags=["material-categories"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def category_to_dict(category: MaterialCategory) -> dict:
@@ -46,7 +48,11 @@ async def list_categories(
 
 
 @router.post("", status_code=201)
-async def create_category(payload: MaterialCategoryCreate, db: AsyncSession = Depends(get_db)):
+async def create_category(
+    payload: MaterialCategoryCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     duplicate = await db.scalar(select(MaterialCategory.id).where(MaterialCategory.slug == payload.slug))
     if duplicate is not None:
         raise ConflictError("دسته‌بندی با این slug قبلاً ثبت شده است", field="slug")
@@ -70,7 +76,12 @@ async def get_category(category_id, db: AsyncSession = Depends(get_db)):
 
 
 @router.patch("/{category_id}")
-async def update_category(category_id, payload: MaterialCategoryUpdate, db: AsyncSession = Depends(get_db)):
+async def update_category(
+    category_id,
+    payload: MaterialCategoryUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     category = await db.get(MaterialCategory, category_id)
     if category is None:
         raise NotFoundError("دسته‌بندی یافت نشد")
@@ -92,7 +103,11 @@ async def update_category(category_id, payload: MaterialCategoryUpdate, db: Asyn
 
 
 @router.delete("/{category_id}")
-async def delete_category(category_id, db: AsyncSession = Depends(get_db)):
+async def delete_category(
+    category_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     category = await db.get(MaterialCategory, category_id)
     if category is None:
         raise NotFoundError("دسته‌بندی یافت نشد")
diff --git a/backend/app/routers/materials.py b/backend/app/routers/materials.py
index c128f9c..c78fcdd 100644
--- a/backend/app/routers/materials.py
+++ b/backend/app/routers/materials.py
@@ -9,6 +9,7 @@ from fastapi import APIRouter, Depends, Query, Request
 from sqlalchemy import exists, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import (
     AttributeDefinition,
@@ -38,6 +39,7 @@ from app.utils.errors import ConflictError, NotFoundError, ValidationError
 from app.utils.pagination import paginate, sort_query
 
 router = APIRouter(prefix="/materials", tags=["materials"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def _coerce_filter_value(data_type: str, raw: str):
@@ -125,7 +127,10 @@ async def list_materials(
 
 @router.post("", status_code=201)
 async def create_material(
-    payload: MaterialCreate, expand: str | None = None, db: AsyncSession = Depends(get_db)
+    payload: MaterialCreate,
+    expand: str | None = None,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     material = await material_service.create_material(db, payload)
     return {"data": await serialize_material(db, material, parse_expand(expand))}
@@ -140,7 +145,12 @@ async def get_material(material_id, expand: str | None = None, db: AsyncSession
 
 
 @router.patch("/{material_id}")
-async def update_material(material_id, payload: MaterialUpdate, db: AsyncSession = Depends(get_db)):
+async def update_material(
+    material_id,
+    payload: MaterialUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     material = await db.get(Material, material_id)
     if material is None:
         raise NotFoundError("متریال یافت نشد")
@@ -149,7 +159,11 @@ async def update_material(material_id, payload: MaterialUpdate, db: AsyncSession
 
 
 @router.delete("/{material_id}")
-async def delete_material(material_id, db: AsyncSession = Depends(get_db)):
+async def delete_material(
+    material_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     material = await db.get(Material, material_id)
     if material is None:
         raise NotFoundError("متریال یافت نشد")
@@ -248,7 +262,10 @@ async def list_material_units(
 
 @router.post("/{material_id}/units", status_code=201)
 async def create_material_unit(
-    material_id, payload: MaterialUnitCreate, db: AsyncSession = Depends(get_db)
+    material_id,
+    payload: MaterialUnitCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     async with db.begin():
         await _material_or_404(db, material_id)
@@ -287,7 +304,11 @@ async def create_material_unit(
 
 @router.patch("/{material_id}/units/{mu_id}")
 async def update_material_unit(
-    material_id, mu_id, payload: MaterialUnitUpdate, db: AsyncSession = Depends(get_db)
+    material_id,
+    mu_id,
+    payload: MaterialUnitUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     async with db.begin():
         mu = await db.scalar(
@@ -319,7 +340,12 @@ async def update_material_unit(
 
 
 @router.delete("/{material_id}/units/{mu_id}")
-async def delete_material_unit(material_id, mu_id, db: AsyncSession = Depends(get_db)):
+async def delete_material_unit(
+    material_id,
+    mu_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     mu = await db.scalar(
         select(MaterialUnit).where(MaterialUnit.id == mu_id, MaterialUnit.material_id == material_id)
     )
@@ -365,7 +391,10 @@ async def get_material_attribute_values(
 
 @router.put("/{material_id}/attribute-values")
 async def put_material_attribute_values(
-    material_id, payload: MaterialAttributeValuesPut, db: AsyncSession = Depends(get_db)
+    material_id,
+    payload: MaterialAttributeValuesPut,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     """FULL replacement of a material's EAV values (empty array deletes all)."""
     async with db.begin():
diff --git a/backend/app/routers/projects.py b/backend/app/routers/projects.py
index 2ebd785..abf791a 100644
--- a/backend/app/routers/projects.py
+++ b/backend/app/routers/projects.py
@@ -3,7 +3,7 @@ from fastapi import APIRouter, Depends, Query, Request
 from sqlalchemy import func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from app.auth import UserContext, get_optional_user
+from app.auth import UserContext, get_optional_user, require_role
 from app.db.engine import get_db
 from app.models.procurement import Project, Quote, User
 from app.schemas.procurement import ProjectCreate, ProjectUpdate
@@ -13,6 +13,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_date, to_iso
 
 router = APIRouter(prefix="/projects", tags=["projects"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _optional_ctx(request: Request, db: AsyncSession = Depends(get_db)) -> UserContext | None:
@@ -77,7 +78,11 @@ async def list_projects(
 
 
 @router.post("", status_code=201)
-async def create_project(payload: ProjectCreate, db: AsyncSession = Depends(get_db)):
+async def create_project(
+    payload: ProjectCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     project = Project(
         name=payload.name,
         description=payload.description,
@@ -103,6 +108,7 @@ async def update_project(
     request: Request,
     ctx: UserContext | None = Depends(_optional_ctx),
     db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     project = await db.get(Project, project_id)
     if project is None:
@@ -133,7 +139,11 @@ async def update_project(
 
 
 @router.delete("/{project_id}")
-async def delete_project(project_id, db: AsyncSession = Depends(get_db)):
+async def delete_project(
+    project_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     project = await db.get(Project, project_id)
     if project is None:
         raise NotFoundError("پروژه یافت نشد")
diff --git a/backend/app/routers/quote_events.py b/backend/app/routers/quote_events.py
index 1f91c41..962bb0b 100644
--- a/backend/app/routers/quote_events.py
+++ b/backend/app/routers/quote_events.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.procurement import Quote, QuoteEvent
 from app.schemas.procurement import NoteEventIn
@@ -11,6 +12,7 @@ from app.utils.errors import NotFoundError, ValidationError
 from app.utils.pagination import paginate, sort_query
 
 router = APIRouter(prefix="/quotes/{quote_id}/events", tags=["quote-events"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 @router.get("")
@@ -34,7 +36,12 @@ async def list_events(
 
 
 @router.post("", status_code=201)
-async def create_event(quote_id, payload: NoteEventIn, db: AsyncSession = Depends(get_db)):
+async def create_event(
+    quote_id,
+    payload: NoteEventIn,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     quote = await db.get(Quote, quote_id)
     if quote is None:
         raise NotFoundError("پیشنهاد (استعلام) یافت نشد")
diff --git a/backend/app/routers/quotes.py b/backend/app/routers/quotes.py
index 489921c..2849be3 100644
--- a/backend/app/routers/quotes.py
+++ b/backend/app/routers/quotes.py
@@ -8,6 +8,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import exists, func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import Material
 from app.models.procurement import (
@@ -42,6 +43,9 @@ from app.utils.security import get_actor
 
 router = APIRouter(prefix="/quotes", tags=["quotes"])
 
+# عملیات نوشتنی تدارکات — فقط ادمین و مدیر تدارکات (مدیر پروژه فقط خواندن دارد)
+_procurement_writer = require_role("admin", "procurement_manager")
+
 
 # --- list filter helpers ---------------------------------------------------
 
@@ -156,7 +160,12 @@ async def get_quote(quote_id, expand: str | None = None, db: AsyncSession = Depe
 # ---------------------------------------------------------------------------
 
 @router.post("", status_code=201)
-async def create_quote(payload: QuoteCreate, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)):
+async def create_quote(
+    payload: QuoteCreate,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
+):
     quote = await quote_service.create_quote(db, payload, actor)
     return {"data": await serialize_quote_with_children(db, quote)}
 
@@ -167,7 +176,11 @@ async def create_quote(payload: QuoteCreate, db: AsyncSession = Depends(get_db),
 
 @router.patch("/{quote_id}")
 async def update_quote(
-    quote_id, payload: QuoteUpdate, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)
+    quote_id,
+    payload: QuoteUpdate,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
 ):
     quote = await quote_service.update_quote(db, quote_id, payload, actor)
     return {"data": await serialize_quote(db, quote, set())}
@@ -175,7 +188,11 @@ async def update_quote(
 
 @router.patch("/{quote_id}/children")
 async def replace_quote_children(
-    quote_id, payload: QuoteChildrenReplaceIn, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)
+    quote_id,
+    payload: QuoteChildrenReplaceIn,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
 ):
     """Full replacement of a quote's line items + termsheets (edit modal)."""
     quote = await quote_service.replace_quote_children(db, quote_id, payload, actor)
@@ -188,7 +205,11 @@ async def replace_quote_children(
 
 @router.patch("/{quote_id}/accept")
 async def accept_quote(
-    quote_id, payload: AcceptQuoteIn, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)
+    quote_id,
+    payload: AcceptQuoteIn,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
 ):
     quote = await quote_service.accept_quote(db, quote_id, payload, actor)
     return {"data": await _accept_response(db, quote)}
@@ -224,7 +245,12 @@ async def _accept_response(db: AsyncSession, quote: Quote) -> dict:
 
 
 @router.patch("/{quote_id}/arrive")
-async def arrive_quote(quote_id, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)):
+async def arrive_quote(
+    quote_id,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
+):
     quote = await quote_service.arrive_quote(db, quote_id, actor)
     return {
         "data": {
@@ -237,7 +263,11 @@ async def arrive_quote(quote_id, db: AsyncSession = Depends(get_db), actor: str
 
 @router.patch("/{quote_id}/arrive-items")
 async def arrive_items(
-    quote_id, payload: ArriveItemsIn, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)
+    quote_id,
+    payload: ArriveItemsIn,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
 ):
     quote = await quote_service.arrive_items(db, quote_id, payload, actor)
     return {
@@ -259,14 +289,23 @@ async def arrive_items(
 
 @router.patch("/{quote_id}/reject")
 async def reject_quote(
-    quote_id, payload: RejectQuoteIn | None = None, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)
+    quote_id,
+    payload: RejectQuoteIn | None = None,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
 ):
     quote = await quote_service.reject_quote(db, quote_id, payload or RejectQuoteIn(), actor)
     return {"data": {"id": str(quote.id), "status": quote.status}}
 
 
 @router.patch("/{quote_id}/expire")
-async def expire_quote(quote_id, db: AsyncSession = Depends(get_db), actor: str = Depends(get_actor)):
+async def expire_quote(
+    quote_id,
+    db: AsyncSession = Depends(get_db),
+    actor: str = Depends(get_actor),
+    _auth=Depends(_procurement_writer),
+):
     quote = await quote_service.expire_quote(db, quote_id, actor)
     return {"data": {"id": str(quote.id), "status": quote.status}}
 
@@ -276,6 +315,10 @@ async def expire_quote(quote_id, db: AsyncSession = Depends(get_db), actor: str
 # ---------------------------------------------------------------------------
 
 @router.delete("/{quote_id}")
-async def delete_quote(quote_id, db: AsyncSession = Depends(get_db)):
+async def delete_quote(
+    quote_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     result = await quote_service.delete_quote(db, quote_id)
     return {"data": result}
diff --git a/backend/app/routers/schedule_steps.py b/backend/app/routers/schedule_steps.py
index fc265e7..d2c03d4 100644
--- a/backend/app/routers/schedule_steps.py
+++ b/backend/app/routers/schedule_steps.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.procurement import Termsheet, TermsheetScheduleStep
 from app.schemas.procurement import ScheduleStepCreate, ScheduleStepUpdate
@@ -15,6 +16,7 @@ router = APIRouter(
     prefix="/quotes/{quote_id}/termsheets/{termsheet_id}/schedule-steps",
     tags=["schedule-steps"],
 )
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _termsheet_or_404(db: AsyncSession, quote_id, termsheet_id) -> Termsheet:
@@ -57,7 +59,11 @@ async def list_schedule_steps(
 
 @router.post("", status_code=201)
 async def create_schedule_step(
-    quote_id, termsheet_id, payload: ScheduleStepCreate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    termsheet_id,
+    payload: ScheduleStepCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     ts = await _termsheet_or_404(db, quote_id, termsheet_id)
     step_no = payload.step_no
@@ -84,7 +90,12 @@ async def create_schedule_step(
 
 @router.patch("/{step_id}")
 async def update_schedule_step(
-    quote_id, termsheet_id, step_id, payload: ScheduleStepUpdate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    termsheet_id,
+    step_id,
+    payload: ScheduleStepUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     step = await _step_or_404(db, termsheet_id, step_id)
     if payload.step_no is not None and payload.step_no != step.step_no:
@@ -109,7 +120,13 @@ async def update_schedule_step(
 
 
 @router.delete("/{step_id}")
-async def delete_schedule_step(quote_id, termsheet_id, step_id, db: AsyncSession = Depends(get_db)):
+async def delete_schedule_step(
+    quote_id,
+    termsheet_id,
+    step_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     step = await _step_or_404(db, termsheet_id, step_id)
     count = await db.scalar(
         select(func.count()).select_from(TermsheetScheduleStep).where(
diff --git a/backend/app/routers/standard_conversions.py b/backend/app/routers/standard_conversions.py
index b63434a..6469399 100644
--- a/backend/app/routers/standard_conversions.py
+++ b/backend/app/routers/standard_conversions.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import StandardConversion
 from app.schemas.catalog import StandardConversionCreate, StandardConversionUpdate
@@ -11,6 +12,7 @@ from app.utils.pagination import paginate
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/standard-conversions", tags=["standard-conversions"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def sc_to_dict(sc: StandardConversion) -> dict:
@@ -41,7 +43,11 @@ async def list_standard_conversions(
 
 
 @router.post("", status_code=201)
-async def create_standard_conversion(payload: StandardConversionCreate, db: AsyncSession = Depends(get_db)):
+async def create_standard_conversion(
+    payload: StandardConversionCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     duplicate = await db.scalar(
         select(StandardConversion.id).where(
             StandardConversion.from_unit == payload.from_unit,
@@ -67,7 +73,12 @@ async def get_standard_conversion(sc_id, db: AsyncSession = Depends(get_db)):
 
 
 @router.patch("/{sc_id}")
-async def update_standard_conversion(sc_id, payload: StandardConversionUpdate, db: AsyncSession = Depends(get_db)):
+async def update_standard_conversion(
+    sc_id,
+    payload: StandardConversionUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     sc = await db.get(StandardConversion, sc_id)
     if sc is None:
         raise NotFoundError("تبدیل استاندارد یافت نشد")
@@ -94,7 +105,11 @@ async def update_standard_conversion(sc_id, payload: StandardConversionUpdate, d
 
 
 @router.delete("/{sc_id}")
-async def delete_standard_conversion(sc_id, db: AsyncSession = Depends(get_db)):
+async def delete_standard_conversion(
+    sc_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     sc = await db.get(StandardConversion, sc_id)
     if sc is None:
         raise NotFoundError("تبدیل استاندارد یافت نشد")
diff --git a/backend/app/routers/supplier_materials.py b/backend/app/routers/supplier_materials.py
index 26e4026..02d5a55 100644
--- a/backend/app/routers/supplier_materials.py
+++ b/backend/app/routers/supplier_materials.py
@@ -8,6 +8,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import Material, MaterialCategory
 from app.models.procurement import Supplier, SupplierMaterial
@@ -18,6 +19,7 @@ from app.utils.pagination import paginate
 from app.utils.serialization import to_iso
 
 router = APIRouter(tags=["supplier-materials"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def link_to_dict(link: SupplierMaterial, material: Material | None = None,
@@ -63,7 +65,10 @@ async def list_supplier_materials(
 
 @router.post("/suppliers/{supplier_id}/materials", status_code=201)
 async def create_supplier_material(
-    supplier_id, payload: SupplierMaterialCreate, db: AsyncSession = Depends(get_db)
+    supplier_id,
+    payload: SupplierMaterialCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     async with db.begin():
         link = await link_supplier_material(db, supplier_id, payload.material_id)
@@ -72,7 +77,12 @@ async def create_supplier_material(
 
 
 @router.delete("/suppliers/{supplier_id}/materials/{material_id}")
-async def delete_supplier_material(supplier_id, material_id, db: AsyncSession = Depends(get_db)):
+async def delete_supplier_material(
+    supplier_id,
+    material_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     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}}
diff --git a/backend/app/routers/suppliers.py b/backend/app/routers/suppliers.py
index 3ab5175..070a9e6 100644
--- a/backend/app/routers/suppliers.py
+++ b/backend/app/routers/suppliers.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import MaterialCategory
 from app.models.procurement import Quote, Supplier
@@ -12,6 +13,7 @@ from app.utils.pagination import paginate, sort_query
 from app.utils.serialization import to_iso
 
 router = APIRouter(prefix="/suppliers", tags=["suppliers"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def supplier_to_dict(supplier: Supplier, category: MaterialCategory | None = None) -> dict:
@@ -71,7 +73,11 @@ async def list_suppliers(
 
 
 @router.post("", status_code=201)
-async def create_supplier(payload: SupplierCreate, db: AsyncSession = Depends(get_db)):
+async def create_supplier(
+    payload: SupplierCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     category = await _category_or_404(db, payload.category_id)
     supplier = Supplier(
         name=payload.name,
@@ -96,7 +102,12 @@ async def get_supplier(supplier_id, db: AsyncSession = Depends(get_db)):
 
 
 @router.patch("/{supplier_id}")
-async def update_supplier(supplier_id, payload: SupplierUpdate, db: AsyncSession = Depends(get_db)):
+async def update_supplier(
+    supplier_id,
+    payload: SupplierUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     supplier = await db.get(Supplier, supplier_id)
     if supplier is None:
         raise NotFoundError("تأمین‌کننده یافت نشد")
@@ -120,7 +131,11 @@ async def update_supplier(supplier_id, payload: SupplierUpdate, db: AsyncSession
 
 
 @router.delete("/{supplier_id}")
-async def delete_supplier(supplier_id, db: AsyncSession = Depends(get_db)):
+async def delete_supplier(
+    supplier_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     supplier = await db.get(Supplier, supplier_id)
     if supplier is None:
         raise NotFoundError("تأمین‌کننده یافت نشد")
diff --git a/backend/app/routers/termsheets.py b/backend/app/routers/termsheets.py
index 16c8f98..b1d5ffd 100644
--- a/backend/app/routers/termsheets.py
+++ b/backend/app/routers/termsheets.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.procurement import (
     ItemDecision,
@@ -26,6 +27,7 @@ from app.utils.errors import ConflictError, NotFoundError, ValidationError
 from app.utils.pagination import paginate, sort_query
 
 router = APIRouter(prefix="/quotes/{quote_id}/termsheets", tags=["termsheets"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 async def _quote_or_404(db: AsyncSession, quote_id) -> Quote:
@@ -80,7 +82,12 @@ async def list_termsheets(
 
 
 @router.post("", status_code=201)
-async def create_termsheet(quote_id, payload: TermsheetCreate, db: AsyncSession = Depends(get_db)):
+async def create_termsheet(
+    quote_id,
+    payload: TermsheetCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     async with db.begin():
         quote = await _quote_or_404(db, quote_id)
         if quote.status != "offered":
@@ -110,7 +117,11 @@ async def get_termsheet(
 
 @router.patch("/{termsheet_id}")
 async def update_termsheet(
-    quote_id, termsheet_id, payload: TermsheetUpdate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    termsheet_id,
+    payload: TermsheetUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     ts = await _termsheet_or_404(db, quote_id, termsheet_id)
     if ts.status != "offered":
@@ -127,7 +138,11 @@ async def update_termsheet(
 
 @router.patch("/{termsheet_id}/status")
 async def update_termsheet_status(
-    quote_id, termsheet_id, payload: TermsheetStatusUpdate, db: AsyncSession = Depends(get_db)
+    quote_id,
+    termsheet_id,
+    payload: TermsheetStatusUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
 ):
     async with db.begin():
         ts = await _termsheet_or_404(db, quote_id, termsheet_id)
@@ -139,7 +154,12 @@ async def update_termsheet_status(
 
 
 @router.delete("/{termsheet_id}")
-async def delete_termsheet(quote_id, termsheet_id, db: AsyncSession = Depends(get_db)):
+async def delete_termsheet(
+    quote_id,
+    termsheet_id,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     ts = await _termsheet_or_404(db, quote_id, termsheet_id)
     quote = await _quote_or_404(db, quote_id)
     if quote.status != "offered":
diff --git a/backend/app/routers/units.py b/backend/app/routers/units.py
index 7152ecd..5004f7a 100644
--- a/backend/app/routers/units.py
+++ b/backend/app/routers/units.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy import func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.auth import require_role
 from app.db.engine import get_db
 from app.models.catalog import AttributeDefinition, Material, MaterialUnit, Unit
 from app.models.procurement import LineItem, LineItemSpec
@@ -11,6 +12,7 @@ from app.utils.errors import ConflictError, NotFoundError
 from app.utils.pagination import paginate, sort_query
 
 router = APIRouter(prefix="/units", tags=["units"])
+_procurement_writer = require_role("admin", "procurement_manager")
 
 
 def unit_full_to_dict(unit: Unit) -> dict:
@@ -45,7 +47,11 @@ async def list_units(
 
 
 @router.post("", status_code=201)
-async def create_unit(payload: UnitCreate, db: AsyncSession = Depends(get_db)):
+async def create_unit(
+    payload: UnitCreate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     duplicate = await db.scalar(select(Unit.id).where(Unit.code == payload.code))
     if duplicate is not None:
         raise ConflictError("واحدی با این کد قبلاً ثبت شده است", field="code")
@@ -70,7 +76,12 @@ async def get_unit(unit_id: int, db: AsyncSession = Depends(get_db)):
 
 
 @router.patch("/{unit_id}")
-async def update_unit(unit_id: int, payload: UnitUpdate, db: AsyncSession = Depends(get_db)):
+async def update_unit(
+    unit_id: int,
+    payload: UnitUpdate,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     unit = await db.get(Unit, unit_id)
     if unit is None:
         raise NotFoundError("واحد یافت نشد")
@@ -92,7 +103,11 @@ async def update_unit(unit_id: int, payload: UnitUpdate, db: AsyncSession = Depe
 
 
 @router.delete("/{unit_id}")
-async def delete_unit(unit_id: int, db: AsyncSession = Depends(get_db)):
+async def delete_unit(
+    unit_id: int,
+    db: AsyncSession = Depends(get_db),
+    _auth=Depends(_procurement_writer),
+):
     unit = await db.get(Unit, unit_id)
     if unit is None:
         raise NotFoundError("واحد یافت نشد")
diff --git a/backend/app/schemas/procurement.py b/backend/app/schemas/procurement.py
index 143c125..666c669 100644
--- a/backend/app/schemas/procurement.py
+++ b/backend/app/schemas/procurement.py
@@ -203,7 +203,7 @@ class UserCreate(APIModel):
     last_name: str = ""
     phone: str | None = None
     casdoor_id: str | None = None
-    role: Literal["pm", "procurement_manager", "admin"] | None = None
+    role: Literal["pm", "procurement_manager", "admin", "supervisor"] | None = None
 
 
 class UserRoleUpdate(APIModel):
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 93e3d4b..8794d12 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -71,6 +71,15 @@ function HomeRoute() {
   return <DashboardPage />;
 }
 
+// دسترسی ایجاد استعلام/پیشنهاد (ویزارد) فقط برای مدیر تدارکات و ادمین
+function RequireProcurementWrite({ children }: { children: React.ReactNode }) {
+  const user = useAuthStore((s) => s.user);
+  if (user?.role !== "admin" && user?.role !== "procurement_manager") {
+    return <Navigate to={user?.role === "pm" ? "/inventory" : "/"} replace />;
+  }
+  return <>{children}</>;
+}
+
 // پنل «مدیریت پروژه (PM)» — اپ PM روی همان دامنه زیر مسیر /pm سرو می‌شود و
 // اینجا به‌صورت iframe تمام‌صفحه داخل پوسته ERP نمایش داده می‌شود.
 function PmPanelPage() {
@@ -109,7 +118,9 @@ export default function App() {
           path="/wizard"
           element={
             <RequireAuth>
-              <WizardPage />
+              <RequireProcurementWrite>
+                <WizardPage />
+              </RequireProcurementWrite>
             </RequireAuth>
           }
         />
diff --git a/frontend/src/components/AppSwitcherMenu.tsx b/frontend/src/components/AppSwitcherMenu.tsx
index 688bfcc..182bad8 100644
--- a/frontend/src/components/AppSwitcherMenu.tsx
+++ b/frontend/src/components/AppSwitcherMenu.tsx
@@ -17,7 +17,7 @@ export function AppSwitcherMenu({
   canSwitchToProcurement = true,
 }: {
   activeModule: "warehouse" | "procurement";
-  canSwitchToProcurement?: boolean; // مدیر پروژه به دفتر تدارکات دسترسی ندارد
+  canSwitchToProcurement?: boolean;
 }) {
   const logout = useLogout();
   const { pathname } = useLocation();
diff --git a/frontend/src/pages/Dashboard/DashboardPage.tsx b/frontend/src/pages/Dashboard/DashboardPage.tsx
index 227b1cd..6ce0103 100644
--- a/frontend/src/pages/Dashboard/DashboardPage.tsx
+++ b/frontend/src/pages/Dashboard/DashboardPage.tsx
@@ -18,12 +18,16 @@ import { LedgerTable } from "./LedgerTable";
 import { AppSwitcherMenu } from "../../components/AppSwitcherMenu";
 import { AcceptModal } from "./AcceptModal";
 import { EditModal } from "./EditModal";
+import { useAuthStore } from "../../store/auth";
 
 const EMPTY_FILTERS: Filters = { supplier: "", status: "", search: "" };
 
 export function DashboardPage() {
   useStoreData();
 
+  const user = useAuthStore((s) => s.user);
+  const canWrite = user?.role === "admin" || user?.role === "procurement_manager";
+
   const quotes = useQuotes();
   const suppliers = useSuppliers();
   const materials = useMaterials();
@@ -114,13 +118,15 @@ export function DashboardPage() {
             </Link>
 
             {/* دکمه اصلی: افزودن پیشنهاد جدید */}
-            <Link
-              to="/wizard"
-              className="inline-flex items-center gap-1.5 px-4 py-2 rounded-xl bg-blue-600 hover:bg-blue-700 active:bg-blue-800 text-white text-xs font-semibold shadow-sm hover:shadow transition-all no-underline"
-            >
-              <Plus className="h-4 w-4" />
-              <span>افزودن پیشنهاد جدید</span>
-            </Link>
+            {canWrite && (
+              <Link
+                to="/wizard"
+                className="inline-flex items-center gap-1.5 px-4 py-2 rounded-xl bg-blue-600 hover:bg-blue-700 active:bg-blue-800 text-white text-xs font-semibold shadow-sm hover:shadow transition-all no-underline"
+              >
+                <Plus className="h-4 w-4" />
+                <span>افزودن پیشنهاد جدید</span>
+              </Link>
+            )}
           </div>
         }
       />
@@ -148,17 +154,20 @@ export function DashboardPage() {
           onToggleExpand={toggleExpand}
           onAccept={setAcceptId}
           onEdit={setEditId}
+          canWrite={canWrite}
         />
       </PageLayout>
 
       {/* دکمه شناور اکشن (FAB) مخصوص نسخه موبایل */}
-      <Link
-        to="/wizard"
-        aria-label="افزودن پیشنهاد جدید"
-        className="md:hidden fixed bottom-20 left-4 z-40 flex h-14 w-14 items-center justify-center rounded-full bg-accent text-white shadow-xl shadow-accent/30 active:scale-95 transition-transform"
-      >
-        <Plus className="h-7 w-7" />
-      </Link>
+      {canWrite && (
+        <Link
+          to="/wizard"
+          aria-label="افزودن پیشنهاد جدید"
+          className="md:hidden fixed bottom-20 left-4 z-40 flex h-14 w-14 items-center justify-center rounded-full bg-accent text-white shadow-xl shadow-accent/30 active:scale-95 transition-transform"
+        >
+          <Plus className="h-7 w-7" />
+        </Link>
+      )}
 
       <AcceptModal quoteId={acceptId} onClose={() => setAcceptId(null)} />
       <EditModal quoteId={editId} onClose={() => setEditId(null)} />
diff --git a/frontend/src/pages/Dashboard/LedgerTable.tsx b/frontend/src/pages/Dashboard/LedgerTable.tsx
index f4a55f5..37789ad 100644
--- a/frontend/src/pages/Dashboard/LedgerTable.tsx
+++ b/frontend/src/pages/Dashboard/LedgerTable.tsx
@@ -10,6 +10,7 @@ export interface LedgerTableProps {
   onToggleExpand: (id: string) => void;
   onAccept: (id: string) => void;
   onEdit: (id: string) => void;
+  canWrite?: boolean;
 }
 
 // دفتر پیشنهادها — فهرست کارت‌ها (واکنش‌گرا و بهینه برای موبایل)
@@ -20,6 +21,7 @@ export function LedgerTable({
   onToggleExpand,
   onAccept,
   onEdit,
+  canWrite = true,
 }: LedgerTableProps) {
   if (!quotes.length) {
     return (
@@ -40,6 +42,7 @@ export function LedgerTable({
           onToggleExpand={() => onToggleExpand(q.id)}
           onAccept={() => onAccept(q.id)}
           onEdit={() => onEdit(q.id)}
+          canWrite={canWrite}
         />
       ))}
       <div className="px-2 py-3 text-center text-[10.5px] leading-5 text-muted sm:py-1 sm:text-[11px]">
diff --git a/frontend/src/pages/Dashboard/QuoteCard.tsx b/frontend/src/pages/Dashboard/QuoteCard.tsx
index 249ae5b..882d134 100644
--- a/frontend/src/pages/Dashboard/QuoteCard.tsx
+++ b/frontend/src/pages/Dashboard/QuoteCard.tsx
@@ -24,6 +24,7 @@ export interface QuoteCardProps {
   onToggleExpand: () => void;
   onAccept: () => void;
   onEdit: () => void;
+  canWrite?: boolean;
 }
 
 function InfoCell({ label, children, className }: { label: string; children: React.ReactNode; className?: string }) {
@@ -35,7 +36,7 @@ function InfoCell({ label, children, className }: { label: string; children: Rea
   );
 }
 
-export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit }: QuoteCardProps) {
+export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit, canWrite = true }: QuoteCardProps) {
   const sup = supplierById(store.suppliers, q.supplier_id);
   const expired = isExpired(q);
   const total = quoteTotal(q);
@@ -46,7 +47,7 @@ export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit
   // ستون / دکمه پذیرش
   let acceptedCell: React.ReactNode;
   if (q.status === "offered") {
-    acceptedCell = (
+    acceptedCell = canWrite ? (
       <button
         onClick={(e) => {
           e.stopPropagation();
@@ -57,6 +58,8 @@ export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit
         <Check className="h-3.5 w-3.5" />
         <span>پذیرش</span>
       </button>
+    ) : (
+      <span className="text-muted text-xs font-medium">در انتظار پذیرش</span>
     );
   } else if (q.accepted_date) {
     acceptedCell = <span className="tabular-nums font-medium">{fmtDateTime(q.accepted_date)}</span>;
@@ -185,19 +188,21 @@ export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit
           )}
 
           {/* دکمه ویرایش */}
-          <button
-            type="button"
-            className="inline-flex h-7 items-center justify-center gap-1 rounded-md border border-line bg-panel px-2 text-xs font-medium text-ink hover:bg-slate-50 dark:hover:bg-zinc-800 transition-colors sm:h-8 sm:px-2.5"
-            onClick={(e) => {
-              e.stopPropagation();
-              onEdit();
-            }}
-            title="ویرایش پیشنهاد"
-            aria-label="ویرایش"
-          >
-            <Pencil className="h-3 w-3 text-muted" />
-            <span className="hidden sm:inline">ویرایش</span>
-          </button>
+          {canWrite && (
+            <button
+              type="button"
+              className="inline-flex h-7 items-center justify-center gap-1 rounded-md border border-line bg-panel px-2 text-xs font-medium text-ink hover:bg-slate-50 dark:hover:bg-zinc-800 transition-colors sm:h-8 sm:px-2.5"
+              onClick={(e) => {
+                e.stopPropagation();
+                onEdit();
+              }}
+              title="ویرایش پیشنهاد"
+              aria-label="ویرایش"
+            >
+              <Pencil className="h-3 w-3 text-muted" />
+              <span className="hidden sm:inline">ویرایش</span>
+            </button>
+          )}
 
           {/* دکمه فلش اکسپند در هدر */}
           <button
diff --git a/frontend/src/pages/Inventory/InventoryPage.tsx b/frontend/src/pages/Inventory/InventoryPage.tsx
index 57fb6d8..6de4884 100644
--- a/frontend/src/pages/Inventory/InventoryPage.tsx
+++ b/frontend/src/pages/Inventory/InventoryPage.tsx
@@ -150,7 +150,7 @@ export function InventoryPage() {
         title="سامانه مدیریت انبار"
         sub={inventorySubheader(user)}
         icon={<WarehouseIcon className="h-4.5 w-4.5" strokeWidth={2} />}
-        menu={<AppSwitcherMenu activeModule="warehouse" canSwitchToProcurement={isAdmin} />}
+        menu={<AppSwitcherMenu activeModule="warehouse" />}
         actions={
           <div className="hidden md:flex items-center gap-2">
             <InventoryTopNav pathname={location.pathname} variant={isAdmin ? "admin" : "pm"} />
diff --git a/frontend/src/pages/Projects/ProjectsPage.tsx b/frontend/src/pages/Projects/ProjectsPage.tsx
index 31d3946..e498572 100644
--- a/frontend/src/pages/Projects/ProjectsPage.tsx
+++ b/frontend/src/pages/Projects/ProjectsPage.tsx
@@ -25,6 +25,7 @@ import { faNum, fmtDate } from "../../lib/formatters";
 import { Header, PageLayout } from "../../components/layout/Header";
 import { EmptyState } from "../../components/EmptyState";
 import { Button } from "../../components/ui/button";
+import { useAuthStore } from "../../store/auth";
 
 function projectQuotes(quotes: Quote[], name: string): Quote[] {
   return quotes.filter(
@@ -83,6 +84,8 @@ export function ProjectsPage() {
   const { standardConversions } = useUnits();
   const addProject = useAddProject();
   const topics = useAppStore((s) => s.topics);
+  const user = useAuthStore((s) => s.user);
+  const canManage = user?.role === "admin" || user?.role === "procurement_manager";
 
   const store: Store = { quotes, suppliers, materials, projects, standardConversions, topics };
 
@@ -90,6 +93,7 @@ export function ProjectsPage() {
   const [newName, setNewName] = useState("");
 
   const addProj = () => {
+    if (!canManage) return;
     const name = newName.trim();
     if (!name) return;
     const dup = projects.some((p) => normalize(p.name) === normalize(name));
@@ -108,29 +112,31 @@ export function ProjectsPage() {
     <div className="min-h-screen">
       <Header title="پروژه‌ها" sub="روی یک پروژه کلیک کنید تا جزئیات آن باز شود" backTo="/" backLabel="بازگشت به دفتر" />
       <PageLayout className="flex flex-col gap-4">
-        <div className="add-panel">
-          <h4>＋ افزودن پروژه‌ی جدید</h4>
-          <div className="grid max-w-md grid-cols-[1fr_auto] items-end gap-2">
-            <div className="field">
-              <label>نام پروژه *</label>
-              <input
-                type="text"
-                className="h-9 w-full rounded-lg border border-line bg-panel px-3 text-sm shadow-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40"
-                placeholder="مثلاً برج آیتا - فاز ۳"
-                autoComplete="off"
-                value={newName}
-                onChange={(e) => setNewName(e.target.value)}
-                onKeyDown={(e) => {
-                  if (e.key === "Enter") {
-                    e.preventDefault();
-                    addProj();
-                  }
-                }}
-              />
+        {canManage && (
+          <div className="add-panel">
+            <h4>＋ افزودن پروژه‌ی جدید</h4>
+            <div className="grid max-w-md grid-cols-[1fr_auto] items-end gap-2">
+              <div className="field">
+                <label>نام پروژه *</label>
+                <input
+                  type="text"
+                  className="h-9 w-full rounded-lg border border-line bg-panel px-3 text-sm shadow-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40"
+                  placeholder="مثلاً برج آیتا - فاز ۳"
+                  autoComplete="off"
+                  value={newName}
+                  onChange={(e) => setNewName(e.target.value)}
+                  onKeyDown={(e) => {
+                    if (e.key === "Enter") {
+                      e.preventDefault();
+                      addProj();
+                    }
+                  }}
+                />
+              </div>
+              <Button onClick={addProj}>افزودن پروژه</Button>
             </div>
-            <Button onClick={addProj}>افزودن پروژه</Button>
           </div>
-        </div>
+        )}
 
         {!projects.length && !quotes.length ? (
           <EmptyState icon={FolderKanban} text="هنوز پروژه‌ای ثبت نشده است." />
diff --git a/frontend/src/pages/Suppliers/CategoryPage.tsx b/frontend/src/pages/Suppliers/CategoryPage.tsx
index e22320e..a1d2f71 100644
--- a/frontend/src/pages/Suppliers/CategoryPage.tsx
+++ b/frontend/src/pages/Suppliers/CategoryPage.tsx
@@ -14,6 +14,7 @@ import { Combobox } from "../../components/Combobox";
 import { SupplierCard, suppliersOfCategory } from "./supplierUtils";
 import { materialLabel } from "../../lib/quoteUtils";
 import { Button } from "../../components/ui/button";
+import { useAuthStore } from "../../store/auth";
 
 // صفحه‌ی تأمین‌کننده‌های یک دسته + فرم افزودن تأمین‌کننده
 export function CategoryPage() {
@@ -26,6 +27,8 @@ export function CategoryPage() {
   const addSupplier = useAddSupplier();
   const removeSupplier = useRemoveSupplier();
   const topics = useAppStore((s) => s.topics);
+  const user = useAuthStore((s) => s.user);
+  const canManage = user?.role === "admin" || user?.role === "procurement_manager";
 
   const cat = useMemo(() => topicByName(catParam, topics)?.name ?? null, [catParam, topics]);
 
@@ -121,7 +124,7 @@ export function CategoryPage() {
                 key={s.id}
                 s={s}
                 topic={cat}
-                deletable
+                deletable={canManage}
                 onDelete={removeSup}
                 materials={supMats.get(s.id) || []}
                 avgLeadTime={supLeadTimes.get(s.id)}
@@ -130,10 +133,11 @@ export function CategoryPage() {
           </div>
         )}
 
-        <div className="add-panel">
-          <h4>
-            <Plus className="me-1 inline h-4 w-4 text-accent" /> افزودن تأمین‌کننده‌ی جدید
-          </h4>
+        {canManage && (
+          <div className="add-panel">
+            <h4>
+              <Plus className="me-1 inline h-4 w-4 text-accent" /> افزودن تأمین‌کننده‌ی جدید
+            </h4>
           <div className="grid max-w-2xl grid-cols-2 gap-3 max-md:grid-cols-1">
             <div className="field">
               <label>نام تأمین‌کننده *</label>
@@ -182,6 +186,7 @@ export function CategoryPage() {
             ذخیره تأمین‌کننده
           </Button>
         </div>
+        )}
       </PageLayout>
     </div>
   );
diff --git a/frontend/src/pages/Suppliers/SupplierDetailPage.tsx b/frontend/src/pages/Suppliers/SupplierDetailPage.tsx
index 6fe0d83..45f679a 100644
--- a/frontend/src/pages/Suppliers/SupplierDetailPage.tsx
+++ b/frontend/src/pages/Suppliers/SupplierDetailPage.tsx
@@ -14,6 +14,7 @@ import { MultiSelectCombobox } from "../../components/MultiSelectCombobox";
 import { ConfirmDeleteDialog } from "../../components/ConfirmDeleteDialog";
 import { normalize } from "../../lib/normalize";
 import { PurchaseHistory } from "./PurchaseHistory";
+import { useAuthStore } from "../../store/auth";
 
 // تمیزکاری و استانداردسازی شماره برای شماره‌گیر خودکار موبایل (اندروید و iOS)
 function cleanPhoneForTel(phone?: string | null): string {
@@ -32,6 +33,8 @@ export function SupplierDetailPage() {
   const quotes = useQuotes();
   const materials = useMaterials();
   const topics = useAppStore((s) => s.topics);
+  const user = useAuthStore((s) => s.user);
+  const canManage = user?.role === "admin" || user?.role === "procurement_manager";
 
   const s = useMemo(() => suppliers.find((x) => x.id === id) || null, [suppliers, id]);
   const [pendingRemove, setPendingRemove] = useState<string | null>(null);
@@ -184,13 +187,15 @@ export function SupplierDetailPage() {
           </div>
 
           <div className="mt-4 flex items-center gap-2">
-            <Link
-              to={`/wizard?topic=${encodeURIComponent(topicName)}&supplier=${encodeURIComponent(s.id)}`}
-              className="btn-line-file no-underline bg-accent text-white hover:bg-accent-dark"
-            >
-              <Plus className="h-3.5 w-3.5" />
-              پیشنهاد جدید
-            </Link>
+            {canManage && (
+              <Link
+                to={`/wizard?topic=${encodeURIComponent(topicName)}&supplier=${encodeURIComponent(s.id)}`}
+                className="btn-line-file no-underline bg-accent text-white hover:bg-accent-dark"
+              >
+                <Plus className="h-3.5 w-3.5" />
+                پیشنهاد جدید
+              </Link>
+            )}
             {firstCat ? (
               <Link to={`/suppliers/category/${encodeURIComponent(firstCat)}`} className="btn-line-file no-underline">
                 ‹ بازگشت به دسته
@@ -216,19 +221,23 @@ export function SupplierDetailPage() {
               {linked.map((c) => (
                 <span key={c} className="spec-chip">
                   {c}
-                  <button type="button" className="spec-chip-x" title="حذف متریال" onClick={() => setPendingRemove(c)}>
-                    <X className="h-3 w-3" />
-                  </button>
+                  {canManage && (
+                    <button type="button" className="spec-chip-x" title="حذف متریال" onClick={() => setPendingRemove(c)}>
+                      <X className="h-3 w-3" />
+                    </button>
+                  )}
                 </span>
               ))}
             </div>
           )}
-          <MultiSelectCombobox
-            values={[]}
-            onChange={(cats) => saveCategories(cats)}
-            options={materialOptions}
-            placeholder="افزودن متریال..."
-          />
+          {canManage && (
+            <MultiSelectCombobox
+              values={[]}
+              onChange={(cats) => saveCategories(cats)}
+              options={materialOptions}
+              placeholder="افزودن متریال..."
+            />
+          )}
           {purchased.length > 0 && (
             <div className="mt-3 border-t border-line pt-2">
               <div className="mb-1 text-[11px] font-semibold text-muted">متریال‌های خریداری‌شده (از پیشنهادها):</div>