Add POS terminal category visibility system

Add posterminal and posterminalcategory tables to control which categories
are visible on each POS terminal. The existence of a row in
posterminalcategory means the category is visible on that terminal.

Store methods:
- posterminal.list/upsert/delete - CRUD for terminals
- posterminal.setOn/setOff - toggle single category on a terminal
- posterminal.setOnAll/setOffAll - toggle all categories on a terminal
- posterminal.getCategoryPosterminalIds - internal, used by category tree

The category tree (getTreeForCompany) now includes a posterminalIds array
on each node listing which terminals have that category enabled.

src/sql/company.js

@@ -10,6 +10,10 @@ FROM company
 WHERE id = @id
 `;
 
+export const GET_COMPANY_ROOT_CATEGORY = `
+SELECT root_category_id AS rootCategoryId FROM company WHERE id = @companyId
+`;
+
 export const CREATE = `
 INSERT INTO company (
     name,

src/sql/posterminal.js

@@ -0,0 +1,89 @@
+export const LIST_BY_COMPANY = `
+SELECT
+    id,
+    token,
+    pairingpin
+FROM posterminal
+WHERE company_id = @companyId
+ORDER BY id
+`;
+
+export const GET_BY_ID = `
+SELECT
+    id,
+    company_id AS companyId,
+    token,
+    pairingpin
+FROM posterminal
+WHERE id = @id
+`;
+
+export const CREATE = `
+INSERT INTO posterminal (company_id, token, pairingpin)
+OUTPUT INSERTED.id, INSERTED.token, INSERTED.pairingpin
+VALUES (@companyId, @token, @pairingpin)
+`;
+
+export const UPDATE = `
+UPDATE posterminal
+SET token = @token, pairingpin = @pairingpin
+WHERE id = @id AND company_id = @companyId
+`;
+
+export const DELETE_BY_COMPANY_AND_ID = `
+DELETE FROM posterminal
+WHERE id = @id AND company_id = @companyId
+`;
+
+export const LIST_CATEGORY_IDS = `
+SELECT category_id AS categoryId
+FROM posterminalcategory
+WHERE posterminal_id = @posterminalId
+`;
+
+/** setOn: insert if not exists (single terminal + single category). */
+export const SET_ON = `
+IF NOT EXISTS (
+    SELECT 1 FROM posterminalcategory
+    WHERE posterminal_id = @posterminalId AND category_id = @categoryId
+)
+INSERT INTO posterminalcategory (posterminal_id, category_id)
+VALUES (@posterminalId, @categoryId)
+`;
+
+/** setOff: remove a single category from a single terminal. */
+export const SET_OFF = `
+DELETE FROM posterminalcategory
+WHERE posterminal_id = @posterminalId AND category_id = @categoryId
+`;
+
+/** setOnAll: enable ALL company categories on one terminal. */
+export const SET_ON_ALL = `
+;WITH cats AS (
+    SELECT id FROM category WHERE id = @rootCategoryId
+    UNION ALL
+    SELECT c.id FROM category c INNER JOIN cats ON c.parent_id = cats.id
+)
+INSERT INTO posterminalcategory (posterminal_id, category_id)
+SELECT @posterminalId, cats.id
+FROM cats
+WHERE NOT EXISTS (
+    SELECT 1 FROM posterminalcategory pc
+    WHERE pc.posterminal_id = @posterminalId AND pc.category_id = cats.id
+)
+`;
+
+/** setOffAll: remove ALL category links from one terminal. */
+export const SET_OFF_ALL = `
+DELETE FROM posterminalcategory WHERE posterminal_id = @posterminalId
+`;
+
+/** For category tree: map category -> posterminal ids (company-scoped). */
+export const POSTERMINAL_IDS_BY_COMPANY = `
+SELECT
+    pc.category_id AS categoryId,
+    pc.posterminal_id AS posterminalId
+FROM posterminalcategory pc
+INNER JOIN posterminal pt ON pt.id = pc.posterminal_id
+WHERE pt.company_id = @companyId
+`;

src/sql/purge.js

@@ -3,6 +3,8 @@ export const TABLES = [
   'companyuser',
   'syncpos',
   'companysetting',
+  'posterminalcategory',
+  'posterminal',
   'numbers',
   'manifestarticle',
   'manifest',