feat: add clients nomenclator, order edit/delete/devalidate, invoice types, dashboard redesign

- New clients table with PF/PJ support, fiscal data (CUI, IBAN, eFactura fields)
- Full CRUD API for clients with search, sync integration
- Order lifecycle: edit header (DRAFT), devalidate (VALIDAT→DRAFT), delete order/invoice
- Invoice types: FACTURA (B2B) vs BON_FISCAL (B2C) with different nr formats
- OrderCreateView redesigned as multi-step flow (client→vehicle→details)
- Autocomplete from catalog_norme/catalog_preturi in OrderLineForm
- Dashboard now combines stats + full orders table with filter tabs and search
- ClientPicker and VehiclePicker with inline creation capability
- Frontend schema aligned with backend (missing columns causing sync errors)
- Mobile responsive fixes for OrderDetailView buttons

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/orders/router.py

@@ -1,8 +1,11 @@
+from datetime import UTC, datetime
+
 from fastapi import APIRouter, Depends, HTTPException
 from fastapi.responses import Response
-from sqlalchemy import select
+from sqlalchemy import select, text
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.db.models.invoice import Invoice
 from app.db.models.order import Order
 from app.db.models.order_line import OrderLine
 from app.db.models.tenant import Tenant
@@ -155,3 +158,115 @@ async def get_deviz_pdf(
             "Content-Disposition": f'inline; filename="deviz-{order.id[:8]}.pdf"'
         },
     )
+
+
+@router.put("/{order_id}")
+async def update_order(
+    order_id: str,
+    data: schemas.UpdateOrderRequest,
+    tenant_id: str = Depends(get_tenant_id),
+    db: AsyncSession = Depends(get_db),
+):
+    r = await db.execute(
+        select(Order).where(Order.id == order_id, Order.tenant_id == tenant_id)
+    )
+    order = r.scalar_one_or_none()
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+    if order.status != "DRAFT":
+        raise HTTPException(status_code=422, detail="Can only update DRAFT orders")
+    update_data = data.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(order, key, value)
+    order.updated_at = datetime.now(UTC).isoformat()
+    await db.commit()
+    await db.refresh(order)
+    return {
+        "id": order.id,
+        "vehicle_id": order.vehicle_id,
+        "client_id": order.client_id,
+        "tip_deviz_id": order.tip_deviz_id,
+        "status": order.status,
+        "km_intrare": order.km_intrare,
+        "observatii": order.observatii,
+        "client_nume": order.client_nume,
+        "client_telefon": order.client_telefon,
+        "nr_auto": order.nr_auto,
+        "marca_denumire": order.marca_denumire,
+        "model_denumire": order.model_denumire,
+    }
+
+
+@router.post("/{order_id}/devalidate")
+async def devalidate_order(
+    order_id: str,
+    tenant_id: str = Depends(get_tenant_id),
+    db: AsyncSession = Depends(get_db),
+):
+    r = await db.execute(
+        select(Order).where(Order.id == order_id, Order.tenant_id == tenant_id)
+    )
+    order = r.scalar_one_or_none()
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+    if order.status != "VALIDAT":
+        raise HTTPException(status_code=422, detail="Can only devalidate VALIDAT orders")
+
+    # Check no invoice exists for this order
+    r = await db.execute(
+        select(Invoice).where(
+            Invoice.order_id == order_id, Invoice.tenant_id == tenant_id
+        )
+    )
+    invoice = r.scalar_one_or_none()
+    if invoice:
+        raise HTTPException(
+            status_code=422,
+            detail="Cannot devalidate order with existing invoice"
+        )
+
+    order.status = "DRAFT"
+    order.updated_at = datetime.now(UTC).isoformat()
+    await db.commit()
+    return {"ok": True, "status": "DRAFT"}
+
+
+@router.delete("/{order_id}")
+async def delete_order(
+    order_id: str,
+    tenant_id: str = Depends(get_tenant_id),
+    db: AsyncSession = Depends(get_db),
+):
+    r = await db.execute(
+        select(Order).where(Order.id == order_id, Order.tenant_id == tenant_id)
+    )
+    order = r.scalar_one_or_none()
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+
+    if order.status == "FACTURAT":
+        # Check if invoice exists
+        r = await db.execute(
+            select(Invoice).where(
+                Invoice.order_id == order_id, Invoice.tenant_id == tenant_id
+            )
+        )
+        invoice = r.scalar_one_or_none()
+        if invoice:
+            raise HTTPException(
+                status_code=422,
+                detail="Cannot delete order with existing invoice"
+            )
+
+    # Delete order lines first
+    await db.execute(
+        text("DELETE FROM order_lines WHERE order_id = :oid AND tenant_id = :tid"),
+        {"oid": order_id, "tid": tenant_id},
+    )
+    # Delete the order
+    await db.execute(
+        text("DELETE FROM orders WHERE id = :oid AND tenant_id = :tid"),
+        {"oid": order_id, "tid": tenant_id},
+    )
+    await db.commit()
+    return {"ok": True}