feat(org): panel-based access system replacing roles (procurement/inventory)

- new tables user_panels (panel: procurement/inventory/pm + level full/limited)
  and user_project_members (M:N membership, separate from pm responsibility)
- UserContext carries panels + member_project_ids; /users/me and the users
  list include them
- admin endpoints: PUT /users/{id}/panels, PUT /users/{id}/panel-projects
- inventory scope: panel inventory 'full' -> manager scope (all projects, NO
  stock change); 'limited' -> supervisor scope (own memberships, stock change
  allowed); legacy roles kept as migration fallback; admin untouched
- procurement writes: _procurement_writer is now panel-aware (admin, legacy
  procurement_manager, or procurement 'full') across all 18 write routers;
  quote CREATE additionally allows 'limited' users restricted to their member
  projects (validated server-side)
- frontend: panel-aware HomeRoute (inventory -> warehouse panel, procurement
  limited -> minimal RequesterHome), wizard project options restricted for
  limited users, change-inventory button/route gated to inventory 'limited',
  organization panel gains the panels & access-levels management section

backend/app/auth.py

@@ -27,7 +27,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.config import settings
 from app.db.engine import AsyncSessionLocal
-from app.models.procurement import Project, User
+from app.models.procurement import Project, User, UserPanel, UserProjectMembership
 from app.utils.errors import (
     ForbiddenError,
     ServiceUnavailableError,
@@ -106,6 +106,10 @@ class UserContext:
     project_id: object | None  # uuid.UUID | None — default (first) project of a PM
     project_ids: list  # every project this PM manages (1:N — empty for non-PMs)
     display_name: str
+    # لایه پنل‌ها (جایگزین نقش‌ها): {'procurement': 'full'|'limited', 'inventory': ...}
+    panels: dict | None = None
+    # عضویت M:N در پروژه‌ها — محدوده داده سطح limited (جدا از مسئولیت PM)
+    member_project_ids: list | None = None
 
 
 async def context_from_claims(claims: dict, db: AsyncSession) -> UserContext:
@@ -153,6 +157,26 @@ async def context_from_claims(claims: dict, db: AsyncSession) -> UserContext:
         project_ids = [p.id for p in projects]
     project_id = project_ids[0] if project_ids else None
 
+    # لایه پنل‌ها: تخصیص پنل + سطح دسترسی و عضویت پروژه‌ای (جدا از نقش)
+    panels: dict = {}
+    panel_rows = (
+        await db.execute(
+            select(UserPanel).where(UserPanel.user_id == user.id).order_by(UserPanel.created_at)
+        )
+    ).scalars().all()
+    for row in panel_rows:
+        panels[row.panel] = row.level
+    member_project_ids: list = [
+        row.project_id
+        for row in (
+            await db.execute(
+                select(UserProjectMembership)
+                .where(UserProjectMembership.user_id == user.id)
+                .order_by(UserProjectMembership.created_at)
+            )
+        ).scalars().all()
+    ]
+
     display_name = f"{user.first_name} {user.last_name}".strip() or user.casdoor_id
     return UserContext(
         user=user,
@@ -160,6 +184,8 @@ async def context_from_claims(claims: dict, db: AsyncSession) -> UserContext:
         project_id=project_id,
         project_ids=project_ids,
         display_name=display_name,
+        panels=panels,
+        member_project_ids=member_project_ids,
     )
 
 
@@ -222,3 +248,31 @@ def require_role(*roles: str):
             raise ForbiddenError("دسترسی به این بخش برای نقش شما مجاز نیست")
         return ctx
     return _dep
+
+
+def require_procurement_writer():
+    """نوشتن در پنل تدارکات — ادمین، پنل تدارکات 'full'، یا نقش میراث مدیر تدارکات
+    (دوره مهاجرت از مدل نقش به مدل پنل)."""
+
+    async def _dep(ctx: UserContext = Depends(get_current_user)) -> UserContext:
+        if ctx.role in ("admin", "procurement_manager"):
+            return ctx
+        if (ctx.panels or {}).get("procurement") == "full":
+            return ctx
+        raise ForbiddenError("دسترسی نوشتن در پنل تدارکات را ندارید")
+
+    return _dep
+
+
+def allow_quote_create():
+    """افزودن استعلام — علاوه بر «نوشتن»، پنل تدارکات 'limited' هم مجاز است
+    (محدود به پروژه‌های عضویت؛ اعتبارسنجی عضویت در خود endpoint انجام می‌شود)."""
+
+    async def _dep(ctx: UserContext = Depends(get_current_user)) -> UserContext:
+        if ctx.role in ("admin", "procurement_manager"):
+            return ctx
+        if (ctx.panels or {}).get("procurement") in ("full", "limited"):
+            return ctx
+        raise ForbiddenError("دسترسی افزودن استعلام ندارید")
+
+    return _dep