Refactor production and stock tests to remove UOM dependency

- Updated production.spec.ts, stock-adjustments.spec.ts, and stock-transfers.spec.ts to eliminate UOM references in API seeder and test cases.
- Adjusted ApiSeeder methods to remove UOM parameters from stock receiving and production template creation.
- Revised documentation to reflect changes in UOM handling, emphasizing that stock is counted in base UOM only.
- Introduced new enums for MeasureUnit and StageQtyUnit to clarify content size and stage input quantities.
- Implemented ItemContent service to validate and normalize content sizes.
- Updated smoke tests to validate production stage inputs expressed in content units, ensuring correct consumption calculations.
- Modified frontend UOM label handling to reflect the removal of per-line UOMs in document lines.

Backend/smoke/m2_templates.py

@@ -44,25 +44,26 @@ def diamond(raw_item, finished_item, uom):
                 "estimatedMinutes": 60, "posX": 80, "posY": 120,
                 "fieldDefs": [{"key": "moisture_ok", "label": "Moisture check",
                                "type": "Checkbox", "required": True}],
-                "inputs": [{"source": "Stock", "itemId": raw_item, "uomId": uom, "qtyPerBatch": 8}],
+                "inputs": [{"source": "Stock", "itemId": raw_item, "qtyPerBatch": 8}],
                 "outputs": [{"key": "tmp-frame", "name": "Frame set", "uomId": uom, "qtyPerBatch": 1}],
             },
             {
                 "key": "tmp-prep", "name": "Prep cushions", "roleLabel": "Upholstery",
                 "estimatedMinutes": 30, "posX": 80, "posY": 320, "fieldDefs": [],
-                "inputs": [{"source": "Stock", "itemId": raw_item, "uomId": uom, "qtyPerBatch": 2}],
+                "inputs": [{"source": "Stock", "itemId": raw_item, "qtyPerBatch": 2}],
                 "outputs": [{"key": "tmp-cushion", "name": "Cushion set", "uomId": uom, "qtyPerBatch": 1}],
             },
             {
                 "key": "tmp-asm", "name": "Assemble & QA", "roleLabel": "QA",
                 "estimatedMinutes": 45, "posX": 560, "posY": 200, "fieldDefs": [],
                 "inputs": [
-                    {"source": "Upstream", "fromOutputKey": "tmp-frame", "uomId": uom, "qtyPerBatch": 1},
-                    {"source": "Upstream", "fromOutputKey": "tmp-cushion", "uomId": uom, "qtyPerBatch": 1},
+                    {"source": "Upstream", "fromOutputKey": "tmp-frame", "qtyPerBatch": 1},
+                    {"source": "Upstream", "fromOutputKey": "tmp-cushion", "qtyPerBatch": 1},
                 ],
-                # Terminal output must name the finished item (FR-MFG-05).
+                # Terminal output must name the finished item (FR-MFG-05), and takes its unit
+                # from that item — sending a uomId as well is rejected.
                 "outputs": [{"key": "tmp-chair", "name": "Chair", "itemId": finished_item,
-                             "uomId": uom, "qtyPerBatch": 1}],
+                             "qtyPerBatch": 1}],
             },
         ],
         "edges": [
@@ -243,7 +244,7 @@ def main():
     grandparent["stages"].append({
         "key": "tmp-mid", "name": "Middle", "estimatedMinutes": 5, "posX": 320, "posY": 120,
         "fieldDefs": [],
-        "inputs": [{"source": "Upstream", "fromOutputKey": cut_output_key, "uomId": uom, "qtyPerBatch": 1}],
+        "inputs": [{"source": "Upstream", "fromOutputKey": cut_output_key, "qtyPerBatch": 1}],
         "outputs": [{"key": "tmp-mid-out", "name": "Mid part", "uomId": uom, "qtyPerBatch": 1}],
     })
     grandparent["edges"] = [e for e in grandparent["edges"] if e["parentKey"] != cut_key]
@@ -320,9 +321,11 @@ def rebuild_from_get(g: dict) -> dict:
                 "inputs": [
                     {"source": i["source"], "itemId": i.get("itemId"),
                      "fromOutputKey": i.get("fromOutputKey"),
-                     "uomId": i["uomId"], "qtyPerBatch": i["qtyPerBatch"]}
+                     "qtyUnit": i["qtyUnit"], "qtyPerBatch": i["qtyPerBatch"]}
                     for i in s["inputs"]
                 ],
+                # uomId round-trips as null on an item-bearing output and as the WIP label
+                # otherwise, so echoing it back verbatim is correct either way.
                 "outputs": [
                     {"key": o["key"], "itemId": o.get("itemId"), "name": o["name"],
                      "uomId": o["uomId"], "qtyPerBatch": o["qtyPerBatch"]}