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/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)