feat(dashboard): supporting schema, seed, catalog links, funnel/PM labels and API contract (merge resolution)

backend/tools/seed.py

@@ -262,8 +262,11 @@ async def run() -> None:
         material_by_name: dict[str, Material] = {}
         brand_material_by_material: dict[str, object] = {}
         for name, cat_slug, unit_code, brand_name in MATERIALS:
+            cat = await get_category(db, cat_slug)
             material = Material(
                 name=name,
+                topic=cat.name,
+                category_id=cat.id,  # v2.8: dashboard Category→Material cascade
                 canonical_unit_id=unit_ids[unit_code],
                 status="active",
             )
@@ -441,6 +444,86 @@ async def run() -> None:
                 ))
             await db.flush()
 
+        # ---- MVP dashboard demo ledger -----------------------------------
+        # Multi-day history so every widget has real data to show:
+        # - two old PURCHASEs 70/85 days ago → dead stock rows (60-90d)
+        # - withdrawals/returns/waste over the last ~12 days → flow series
+        # - tickets dated TODAY (performed_by names) → daily control
+        # Quantities are hand-checked to keep every row >= 0.
+
+        async def ensure_inv(mat_idx: int, project_idx: int, wh_idx: int) -> InventoryItem:
+            mat = material_by_name[MATERIALS[mat_idx][0]]
+            wh = warehouse_rows[project_idx][wh_idx]
+            inv = await db.scalar(select(InventoryItem).where(
+                InventoryItem.warehouse_id == wh.id,
+                InventoryItem.material_id == mat.id,
+                InventoryItem.specs_hash == "default",
+            ))
+            if inv is None:
+                inv = InventoryItem(
+                    warehouse_id=wh.id, material_id=mat.id, brand_id=None,
+                    quantity=Decimal("0"), unit_id=mat.canonical_unit_id,
+                    specs={}, specs_hash="default",
+                )
+                db.add(inv)
+                await db.flush()
+            return inv
+
+        async def add_tx(inv: InventoryItem, wh: Warehouse, tx_type: str, qty: int,
+                         days_ago: int, performed_by: str, note: str | None = None) -> None:
+            inv.quantity += Decimal(str(qty))
+            db.add(InventoryTransaction(
+                inventory_id=inv.id,
+                warehouse_id=wh.id,
+                transaction_type=tx_type,
+                quantity=Decimal(str(qty)),
+                performed_by=performed_by,
+                note=note or "تاریخچه دمو داشبورد",
+                transaction_date=d(days_ago),
+            ))
+
+        wh_aram, wh_sepehr, wh_shargh = warehouse_rows[0], warehouse_rows[1], warehouse_rows[2]
+
+        # dead stock: cable + switches bought long ago, untouched since
+        cable = await ensure_inv(0, 0, 0)
+        await add_tx(cable, wh_aram[0], "PURCHASE", 800, 70, "حسین موسوی", "خرید اولیه — دمو")
+        keys = await ensure_inv(1, 0, 0)
+        await add_tx(keys, wh_aram[0], "PURCHASE", 200, 85, "حسین موسوی", "خرید اولیه — دمو")
+
+        # cement (انبار مرکزی آرام is project0 — cement lives in شرق اصلی)
+        cement = await ensure_inv(4, 2, 0)
+        await add_tx(cement, wh_shargh[0], "WITHDRAWAL", -80, 10, "رضا محمدی")
+        await add_tx(cement, wh_shargh[0], "WITHDRAWAL", -60, 8, "رضا محمدی")
+        await add_tx(cement, wh_shargh[0], "RETURN", 20, 7, "علی رضایی", "برگشت از سایت — مازاد")
+        await add_tx(cement, wh_shargh[0], "DAMAGE", -10, 5, "کاربر تست")
+        await add_tx(cement, wh_shargh[0], "WITHDRAWAL", -50, 1, "رضا محمدی")
+        await add_tx(cement, wh_shargh[0], "WITHDRAWAL", -30, 0, "رضا محمدی")
+        await add_tx(cement, wh_shargh[0], "RETURN", 12, 0, "علی رضایی", "برگشت از سایت — امروز")
+
+        blocks = await ensure_inv(5, 2, 1)
+        await add_tx(blocks, wh_shargh[1], "WITHDRAWAL", -400, 12, "رضا محمدی")
+        await add_tx(blocks, wh_shargh[1], "WITHDRAWAL", -300, 9, "کاربر تست")
+        await add_tx(blocks, wh_shargh[1], "LOSS", -15, 6, "کاربر تست")
+        await add_tx(blocks, wh_shargh[1], "WASTE", -25, 4, "رضا محمدی")
+        await add_tx(blocks, wh_shargh[1], "WITHDRAWAL", -250, 0, "حسین موسوی")
+
+        pe16_a = await ensure_inv(6, 1, 0)
+        await add_tx(pe16_a, wh_sepehr[0], "WITHDRAWAL", -100, 6, "محمد محقق")
+        await add_tx(pe16_a, wh_sepehr[0], "RETURN", 25, 3, "محمد محقق", "برگشت — برش اضافه")
+        await add_tx(pe16_a, wh_sepehr[0], "WITHDRAWAL", -80, 0, "محمد محقق")
+
+        pe16_b = await ensure_inv(6, 1, 1)
+        await add_tx(pe16_b, wh_sepehr[1], "WITHDRAWAL", -150, 11, "محمد محقق")
+        await add_tx(pe16_b, wh_sepehr[1], "WASTE", -20, 7, "محمد محقق")
+        await add_tx(pe16_b, wh_sepehr[1], "WITHDRAWAL", -120, 2, "محمد محقق")
+
+        pe25 = await ensure_inv(7, 1, 0)
+        await add_tx(pe25, wh_sepehr[0], "WITHDRAWAL", -60, 9, "محمد محقق")
+        await add_tx(pe25, wh_sepehr[0], "RETURN", 10, 5, "محمد محقق")
+        await add_tx(pe25, wh_sepehr[0], "DAMAGE", -8, 3, "محمد محقق")
+
+        await db.flush()
+
         await db.commit()
 
     # summary