Add unit API and article unitamount/unitSi patch.

Units use the selected company; article PATCH accepts name/unitamount/unitSi.

docs/api/README.md

@@ -53,6 +53,9 @@ Generated from `@openapi` annotations in [`src/api/routes/`](../../src/api/route
 | [`routes/health.md`](routes/health.md) | `GET /health` |
 | [`routes/image/get.md`](routes/image/get.md) | `GET /image/{fullHash}` |
 | [`routes/thumb/get.md`](routes/thumb/get.md) | `GET /thumb/{fullHash}` |
+| [`routes/unit/delete.md`](routes/unit/delete.md) | `DELETE /unit` |
+| [`routes/unit/list.md`](routes/unit/list.md) | `GET /unit` |
+| [`routes/unit/upsert.md`](routes/unit/upsert.md) | `PUT /unit` |
 
 Machine-readable spec: [`openapi.json`](openapi.json).
 

docs/api/openapi.json

@@ -32,12 +32,280 @@
       "name": "Company",
       "description": "Company CRUD"
     },
+    {
+      "name": "Unit",
+      "description": "Company-scoped units of measure"
+    },
     {
       "name": "Image",
       "description": "Content-addressed AVIF by fullHash"
     }
   ],
   "paths": {
+    "/unit": {
+      "get": {
+        "tags": [
+          "Unit"
+        ],
+        "summary": "List units",
+        "description": "Lists units for the authenticated user's selected company (default-language symbol/name).",
+        "security": [
+          {
+            "cookieAuth": []
+          }
+        ],
+        "x-markdown": "unit/list.md",
+        "responses": {
+          "200": {
+            "description": "Unit list",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "units": {
+                      "type": "array",
+                      "items": {
+                        "$ref": "#/components/schemas/Unit"
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "No company selected",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Not authorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Company not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "Unit"
+        ],
+        "summary": "Upsert unit",
+        "description": "Insert or update unit by `si` for the selected company. Upserts `unittext` for the company language.\n`basesifactor` must be finite and `> 0`.\n",
+        "security": [
+          {
+            "cookieAuth": []
+          }
+        ],
+        "x-markdown": "unit/upsert.md",
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "object",
+                "required": [
+                  "si",
+                  "basesi",
+                  "basesifactor",
+                  "symbol",
+                  "name"
+                ],
+                "properties": {
+                  "si": {
+                    "type": "string"
+                  },
+                  "basesi": {
+                    "type": "string"
+                  },
+                  "basesifactor": {
+                    "type": "number"
+                  },
+                  "symbol": {
+                    "type": "string"
+                  },
+                  "name": {
+                    "type": "string"
+                  }
+                },
+                "example": {
+                  "si": "l",
+                  "basesi": "l",
+                  "basesifactor": 1,
+                  "symbol": "L",
+                  "name": "Liter"
+                }
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Upserted unit",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "unit": {
+                      "$ref": "#/components/schemas/Unit"
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid unit or no company selected",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Not authorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Company not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "Unit"
+        ],
+        "summary": "Delete unit",
+        "description": "Deletes `si` for the selected company. Fails with `Unit in use` if articles still reference it.",
+        "security": [
+          {
+            "cookieAuth": []
+          }
+        ],
+        "x-markdown": "unit/delete.md",
+        "parameters": [
+          {
+            "in": "query",
+            "name": "si",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "204": {
+            "description": "Deleted"
+          },
+          "400": {
+            "description": "Missing si or no company selected",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Not authorized",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Company or unit not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          },
+          "409": {
+            "description": "Unit in use",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/image/{fullHash}": {
       "get": {
         "tags": [
@@ -1110,7 +1378,7 @@
           "Article"
         ],
         "summary": "Update article by SKU",
-        "description": "Updates an article name by SKU; returns the same detail shape as GET.",
+        "description": "Patches article fields. At least one of `name`, `unitamount`, `unitSi` required.\n`unitSi` must already exist for the company. Returns the same detail shape as GET.\n",
         "security": [
           {
             "cookieAuth": []
@@ -1134,16 +1402,22 @@
             "application/json": {
               "schema": {
                 "type": "object",
-                "required": [
-                  "name"
-                ],
                 "properties": {
                   "name": {
                     "type": "string"
+                  },
+                  "unitamount": {
+                    "type": "number",
+                    "description": "Must be finite and `> 0`"
+                  },
+                  "unitSi": {
+                    "type": "string",
+                    "description": "Existing company unit `si`"
                   }
                 },
                 "example": {
-                  "name": "Updated name"
+                  "unitamount": 0.24,
+                  "unitSi": "l"
                 }
               }
             }
@@ -1166,7 +1440,7 @@
             }
           },
           "400": {
-            "description": "Validation error",
+            "description": "Validation error (Name required / Invalid unitamount)",
             "content": {
               "application/json": {
                 "schema": {
@@ -1196,7 +1470,7 @@
             }
           },
           "404": {
-            "description": "Article not found",
+            "description": "Article or unit not found",
             "content": {
               "application/json": {
                 "schema": {
@@ -1283,7 +1557,7 @@
           "Article"
         ],
         "summary": "Replace POS prices by SKU",
-        "description": "Replace-all prices for the company POS customer group.\nEach entry: `price` (gross), `tax` (rate %, ensured via tax.ensure), optional `minmultiplier` (default 1).\nStored as net = gross / (1 + tax/100). Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.\n",
+        "description": "Replace-all prices for the company POS customer group.\nEach entry: `price` (net), `tax` (rate, ensured via tax.ensure), optional `minmultiplier` (default 1).\nEmpty `prices` clears all POS prices. Returns the same shape as GET by SKU.\n",
         "security": [
           {
             "cookieAuth": []
@@ -1321,11 +1595,11 @@
                       "properties": {
                         "price": {
                           "type": "number",
-                          "description": "Gross price (Brutto)"
+                          "description": "Net price"
                         },
                         "tax": {
                           "type": "number",
-                          "description": "Tax rate percent (e.g. 19)"
+                          "description": "Tax rate (e.g. 19)"
                         },
                         "minmultiplier": {
                           "type": "number",
@@ -1338,11 +1612,11 @@
                 "example": {
                   "prices": [
                     {
-                      "price": 11.9,
+                      "price": 10.5,
                       "tax": 19
                     },
                     {
-                      "price": 99,
+                      "price": 9.9,
                       "tax": 19,
                       "minmultiplier": 10
                     }
@@ -2042,6 +2316,33 @@
           }
         }
       },
+      "Unit": {
+        "type": "object",
+        "required": [
+          "si",
+          "basesi",
+          "basesifactor"
+        ],
+        "properties": {
+          "si": {
+            "type": "string"
+          },
+          "basesi": {
+            "type": "string"
+          },
+          "basesifactor": {
+            "type": "number"
+          },
+          "symbol": {
+            "type": "string",
+            "nullable": true
+          },
+          "name": {
+            "type": "string",
+            "nullable": true
+          }
+        }
+      },
       "ArticleSummary": {
         "type": "object",
         "properties": {

docs/api/routes/article/set-prices.md

@@ -5,8 +5,8 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 Replace POS prices by SKU
 
 Replace-all prices for the company POS customer group.
-Each entry: `price` (gross), `tax` (rate %, ensured via tax.ensure), optional `minmultiplier` (default 1).
+Each entry: `price` (net), `tax` (rate, ensured via tax.ensure), optional `minmultiplier` (default 1).
-Stored as net = gross / (1 + tax/100). Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.
+Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.
 
 
 ## Path parameters
@@ -21,11 +21,11 @@ Stored as net = gross / (1 + tax/100). Empty `prices` clears all POS prices. Ret
 {
   "prices": [
     {
-      "price": 11.9,
+      "price": 10.5,
       "tax": 19
     },
     {
-      "price": 99,
+      "price": 9.9,
       "tax": 19,
       "minmultiplier": 10
     }

docs/api/routes/article/update.md

@@ -4,7 +4,9 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 
 Update article by SKU
 
-Updates an article name by SKU; returns the same detail shape as GET.
+Patches article fields. At least one of `name`, `unitamount`, `unitSi` required.
+`unitSi` must already exist for the company. Returns the same detail shape as GET.
+
 
 ## Path parameters
 
@@ -16,7 +18,8 @@ Updates an article name by SKU; returns the same detail shape as GET.
 
 ```json
 {
-  "name": "Updated name"
+  "unitamount": 0.24,
+  "unitSi": "l"
 }
 ```
 
@@ -34,10 +37,10 @@ Updated article detail
 
 | Status | Description |
 |--------|-------------|
-| 400 | Validation error — `{"error":"…"}` |
+| 400 | Validation error (Name required / Invalid unitamount) — `{"error":"…"}` |
 | 401 | Unauthorized — `{"error":"…"}` |
 | 403 | Not authorized — `{"error":"…"}` |
-| 404 | Article not found — `{"error":"…"}` |
+| 404 | Article or unit not found — `{"error":"…"}` |
 
 ---
 

docs/api/routes/unit/delete.md

@@ -0,0 +1,33 @@
+# `DELETE /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Delete unit
+
+Deletes `si` for the selected company. Fails with `Unit in use` if articles still reference it.
+
+## Query parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `si` | yes | string |  |
+
+## Response `204`
+
+Deleted
+
+_No content_
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Missing si or no company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company or unit not found — `{"error":"…"}` |
+| 409 | Unit in use — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._

docs/api/routes/unit/list.md

@@ -0,0 +1,30 @@
+# `GET /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+List units
+
+Lists units for the authenticated user's selected company (default-language symbol/name).
+
+## Response `200`
+
+Unit list
+
+```json
+{
+  "units": []
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | No company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company not found — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._

docs/api/routes/unit/upsert.md

@@ -0,0 +1,44 @@
+# `PUT /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Upsert unit
+
+Insert or update unit by `si` for the selected company. Upserts `unittext` for the company language.
+`basesifactor` must be finite and `> 0`.
+
+
+## Body (JSON)
+
+```json
+{
+  "si": "l",
+  "basesi": "l",
+  "basesifactor": 1,
+  "symbol": "L",
+  "name": "Liter"
+}
+```
+
+## Response `200`
+
+Upserted unit
+
+```json
+{
+  "unit": { … }
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Invalid unit or no company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company not found — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._

scripts/generateApiDocs.js

@@ -33,6 +33,7 @@ const options = {
             { name: 'Article', description: 'Articles under categories' },
             { name: 'Category', description: 'Category tree and membership' },
             { name: 'Company', description: 'Company CRUD' },
+            { name: 'Unit', description: 'Company-scoped units of measure' },
             { name: 'Image', description: 'Content-addressed AVIF by fullHash' },
         ],
     },

src/api/openapi.js

@@ -57,6 +57,22 @@
  *           type: integer
  *         name:
  *           type: string
+ *     Unit:
+ *       type: object
+ *       required: [si, basesi, basesifactor]
+ *       properties:
+ *         si:
+ *           type: string
+ *         basesi:
+ *           type: string
+ *         basesifactor:
+ *           type: number
+ *         symbol:
+ *           type: string
+ *           nullable: true
+ *         name:
+ *           type: string
+ *           nullable: true
  *     ArticleSummary:
  *       type: object
  *       properties:

src/api/routes/article.js

@@ -36,6 +36,8 @@ function articleErrorStatus(error) {
     if (error.message === 'Article has children') return 400;
     if (error.message === 'Invalid prices') return 400;
     if (error.message === 'POS customer group required') return 400;
+    if (error.message === 'Invalid unitamount') return 400;
+    if (error.message === 'Unit not found') return 404;
     return 500;
 }
 
@@ -185,7 +187,9 @@ export function register(app, basePath = '') {
      *   patch:
      *     tags: [Article]
      *     summary: Update article by SKU
-     *     description: Updates an article name by SKU; returns the same detail shape as GET.
+     *     description: |
+     *       Patches article fields. At least one of `name`, `unitamount`, `unitSi` required.
+     *       `unitSi` must already exist for the company. Returns the same detail shape as GET.
      *     security:
      *       - cookieAuth: []
      *     x-markdown: article/update.md
@@ -202,12 +206,18 @@ export function register(app, basePath = '') {
      *         application/json:
      *           schema:
      *             type: object
-     *             required: [name]
      *             properties:
      *               name:
      *                 type: string
+     *               unitamount:
+     *                 type: number
+     *                 description: Must be finite and `> 0`
+     *               unitSi:
+     *                 type: string
+     *                 description: Existing company unit `si`
      *             example:
-     *               name: Updated name
+     *               unitamount: 0.24
+     *               unitSi: l
      *     responses:
      *       200:
      *         description: Updated article detail
@@ -219,7 +229,7 @@ export function register(app, basePath = '') {
      *                 article:
      *                   $ref: '#/components/schemas/ArticleDetail'
      *       400:
-     *         description: Validation error
+     *         description: Validation error (Name required / Invalid unitamount)
      *         content:
      *           application/json:
      *             schema:
@@ -237,7 +247,7 @@ export function register(app, basePath = '') {
      *             schema:
      *               $ref: '#/components/schemas/Error'
      *       404:
-     *         description: Article not found
+     *         description: Article or unit not found
      *         content:
      *           application/json:
      *             schema:
@@ -309,13 +319,24 @@ export function register(app, basePath = '') {
             return res.status(400).json({ error: 'sku is required' });
         }
 
-        const name = typeof req.body?.name === 'string' ? req.body.name.trim() : '';
+        const body = req.body ?? {};
-        if (!name) {
+        const patch = {};
-            return res.status(400).json({ error: 'name is required' });
+        if (Object.prototype.hasOwnProperty.call(body, 'name')) {
+            patch.name = body.name;
+        }
+        if (Object.prototype.hasOwnProperty.call(body, 'unitamount')) {
+            patch.unitamount = body.unitamount;
+        }
+        if (Object.prototype.hasOwnProperty.call(body, 'unitSi')) {
+            patch.unitSi = body.unitSi;
+        }
+
+        if (!('name' in patch) && !('unitamount' in patch) && !('unitSi' in patch)) {
+            return res.status(400).json({ error: 'name, unitamount, or unitSi is required' });
         }
 
         try {
-            const article = await db.updateBySku(req.user.id, decodeURIComponent(sku), { name });
+            const article = await db.updateBySku(req.user.id, decodeURIComponent(sku), patch);
             res.status(200).json({ article });
         } catch (error) {
             const status = articleErrorStatus(error);

src/api/routes/unit.js

@@ -0,0 +1,246 @@
+import * as db from '../../db/unit.js';
+
+function requireSelectedCompany(req) {
+    const companyId = req.user.selectedCompanyId;
+    if (companyId == null) {
+        return { error: 'No company selected' };
+    }
+    return { companyId };
+}
+
+function unitErrorStatus(error) {
+    if (error.message === 'Not authorized') return 403;
+    if (error.message === 'Company not found') return 404;
+    if (error.message === 'Unit not found') return 404;
+    if (error.message === 'Invalid unit') return 400;
+    if (error.message === 'Unit in use') return 409;
+    return 500;
+}
+
+/**
+ * Registers unit routes for the authenticated user's selected company.
+ * @param {import('express').Application} app
+ * @param {string} [basePath='']
+ */
+export function register(app, basePath = '') {
+    /**
+     * @openapi
+     * /unit:
+     *   get:
+     *     tags: [Unit]
+     *     summary: List units
+     *     description: Lists units for the authenticated user's selected company (default-language symbol/name).
+     *     security:
+     *       - cookieAuth: []
+     *     x-markdown: unit/list.md
+     *     responses:
+     *       200:
+     *         description: Unit list
+     *         content:
+     *           application/json:
+     *             schema:
+     *               type: object
+     *               properties:
+     *                 units:
+     *                   type: array
+     *                   items:
+     *                     $ref: '#/components/schemas/Unit'
+     *       400:
+     *         description: No company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       403:
+     *         description: Not authorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       404:
+     *         description: Company not found
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *   put:
+     *     tags: [Unit]
+     *     summary: Upsert unit
+     *     description: |
+     *       Insert or update unit by `si` for the selected company. Upserts `unittext` for the company language.
+     *       `basesifactor` must be finite and `> 0`.
+     *     security:
+     *       - cookieAuth: []
+     *     x-markdown: unit/upsert.md
+     *     requestBody:
+     *       required: true
+     *       content:
+     *         application/json:
+     *           schema:
+     *             type: object
+     *             required: [si, basesi, basesifactor, symbol, name]
+     *             properties:
+     *               si:
+     *                 type: string
+     *               basesi:
+     *                 type: string
+     *               basesifactor:
+     *                 type: number
+     *               symbol:
+     *                 type: string
+     *               name:
+     *                 type: string
+     *             example:
+     *               si: l
+     *               basesi: l
+     *               basesifactor: 1
+     *               symbol: L
+     *               name: Liter
+     *     responses:
+     *       200:
+     *         description: Upserted unit
+     *         content:
+     *           application/json:
+     *             schema:
+     *               type: object
+     *               properties:
+     *                 unit:
+     *                   $ref: '#/components/schemas/Unit'
+     *       400:
+     *         description: Invalid unit or no company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       403:
+     *         description: Not authorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       404:
+     *         description: Company not found
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *   delete:
+     *     tags: [Unit]
+     *     summary: Delete unit
+     *     description: Deletes `si` for the selected company. Fails with `Unit in use` if articles still reference it.
+     *     security:
+     *       - cookieAuth: []
+     *     x-markdown: unit/delete.md
+     *     parameters:
+     *       - in: query
+     *         name: si
+     *         required: true
+     *         schema:
+     *           type: string
+     *     responses:
+     *       204:
+     *         description: Deleted
+     *       400:
+     *         description: Missing si or no company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       403:
+     *         description: Not authorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       404:
+     *         description: Company or unit not found
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       409:
+     *         description: Unit in use
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     */
+    app.get(`${basePath}/unit`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        try {
+            const units = await db.list(req.user.id, selected.companyId);
+            res.status(200).json({ units });
+        } catch (error) {
+            const status = unitErrorStatus(error);
+            if (status === 500) console.error('List units failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+
+    app.put(`${basePath}/unit`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        const { si, basesi, basesifactor, symbol, name } = req.body ?? {};
+
+        try {
+            const unit = await db.upsert(req.user.id, selected.companyId, {
+                si,
+                basesi,
+                basesifactor,
+                symbol,
+                name,
+            });
+            res.status(200).json({ unit });
+        } catch (error) {
+            const status = unitErrorStatus(error);
+            if (status === 500) console.error('Upsert unit failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+
+    app.delete(`${basePath}/unit`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        const si = typeof req.query.si === 'string' ? req.query.si.trim() : '';
+        if (!si) {
+            return res.status(400).json({ error: 'si is required' });
+        }
+
+        try {
+            await db.remove(req.user.id, selected.companyId, si);
+            res.sendStatus(204);
+        } catch (error) {
+            const status = unitErrorStatus(error);
+            if (status === 500) console.error('Delete unit failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+}

src/db/store.js

@@ -13,6 +13,7 @@ const STORE_NAMESPACES = [
     'category',
     'article',
     'pic',
+    'unit',
     'lang',
     'tax',
     'google_auth',

src/db/unit.js

@@ -0,0 +1,16 @@
+import { getStore } from './store.js';
+
+export async function list(googleAuthId, companyId) {
+    const store = await getStore();
+    return store.unit.list(googleAuthId, companyId);
+}
+
+export async function upsert(googleAuthId, companyId, data) {
+    const store = await getStore();
+    return store.unit.upsert(googleAuthId, companyId, data);
+}
+
+export async function remove(googleAuthId, companyId, si) {
+    const store = await getStore();
+    return store.unit.delete(googleAuthId, companyId, si);
+}