update: Major Overhault to all subsystems

.claude/crm-step-01.md

@@ -0,0 +1,49 @@
+# CRM Step 01 — Backend: Module Scaffold + Products CRUD
+
+## Context
+Read `.claude/crm-build-plan.md` first for full data models, conventions, and IMPORTANT NOTES.
+
+## Task
+Create the `backend/crm/` module with Products CRUD. This is the first CRM backend step.
+
+## What to build
+
+### 1. `backend/crm/__init__.py` — empty
+
+### 2. `backend/crm/models.py`
+Pydantic models for Products:
+- `ProductCosts` — pcb, components, enclosure, labor_hours, labor_rate, shipping_in, total (all float/int, all optional)
+- `ProductStock` — on_hand, reserved, available (int, defaults 0)
+- `ProductCategory` enum — controller, striker, clock, part, repair_service
+- `ProductCreate` — name, sku (optional), category, description (optional), price (float), currency (default "EUR"), costs (ProductCosts optional), stock (ProductStock optional), nextcloud_folder (optional), linked_device_type (optional), active (bool default True)
+- `ProductUpdate` — all fields Optional
+- `ProductInDB` — extends ProductCreate + id (str), created_at (str), updated_at (str)
+- `ProductListResponse` — products: List[ProductInDB], total: int
+
+### 3. `backend/crm/service.py`
+Firestore collection: `crm_products`
+Functions:
+- `list_products(search=None, category=None, active_only=False) -> List[ProductInDB]`
+- `get_product(product_id) -> ProductInDB` — raises HTTPException 404 if not found
+- `create_product(data: ProductCreate) -> ProductInDB` — generates UUID id, sets created_at/updated_at to ISO now
+- `update_product(product_id, data: ProductUpdate) -> ProductInDB` — partial update (only set fields), updates updated_at
+- `delete_product(product_id) -> None` — raises 404 if not found
+
+### 4. `backend/crm/router.py`
+Prefix: `/api/crm/products`, tag: `crm-products`
+All routes require `require_permission("crm", "view")` for GET, `require_permission("crm", "edit")` for POST/PUT/DELETE.
+- `GET /` → list_products (query params: search, category, active_only)
+- `GET /{product_id}` → get_product
+- `POST /` → create_product
+- `PUT /{product_id}` → update_product
+- `DELETE /{product_id}` → delete_product
+
+### 5. Register in `backend/main.py`
+Add: `from crm.router import router as crm_products_router`
+Add: `app.include_router(crm_products_router)` (after existing routers)
+
+## Notes
+- Use `uuid.uuid4()` for IDs
+- Use `datetime.utcnow().isoformat()` for timestamps
+- Follow exact Firestore pattern from `backend/devices/service.py`
+- No new pip dependencies needed