Revert 253c922: restore the PM/RBAC work to the integration

Reverting the production revert so the pm branch can merge cleanly on
top of the restored RBAC base. Conflicts against newer integration work
resolved by combining:
- App.tsx: v7's bot-draft wizard bypass + login returnUrl kept alongside
  the supervisor gating (no-project block screen, panel scoping)
- LoginPage: returnUrl navigation kept, supervisor routing added
- migration.sql: bot_drafts table kept, unified-projects ALTERs restored

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")