docs: split Structure into six linked department pages

scripts/department-pages.test.mjs

@@ -0,0 +1,26 @@
+import {test} from 'node:test';
+import assert from 'node:assert/strict';
+import {readFileSync} from 'node:fs';
+import {createHash} from 'node:crypto';
+const read=p=>readFileSync(p,'utf8');
+const slugs=['product','technology','operations','marketing','finance-accounting','hr-administration'];
+test('all six department bodies are preserved exactly and absent from overview',()=>{
+ const manifest=JSON.parse(read('research/organization/department-migration.json'));
+ assert.deepEqual(manifest.departments.map(d=>d.slug),slugs);
+ const overview=read('docs/organization/structure.mdx');
+ for(const d of manifest.departments){
+  const page=read(`docs/organization/structure/${d.slug}.mdx`);
+  const body=page.replace(/^---\n[\s\S]*?\n---\n/, '').split('[Return to Structure overview]')[0].trim();
+  assert.equal(createHash('sha256').update(body).digest('hex'),d.bodySha256,d.slug);
+  assert(!overview.includes(body));
+  assert(overview.includes(`./structure/${d.slug}.mdx`));
+  assert(page.includes('(../structure.mdx)'));
+ }
+ assert.deepEqual(manifest.departments.map(d=>d.rows),[2,5,4,6,3,3]);
+});
+test('Structure is a linked category with six direct children and preserved peers',()=>{
+ const sidebar=read('sidebars/organization.ts');
+ assert(sidebar.includes("link: {type: 'doc', id: 'structure'}"));
+ assert.deepEqual([...sidebar.matchAll(/'structure\/([^']+)'/g)].map(m=>m[1]),slugs);
+ assert(sidebar.includes("'collaboration', 'sdlc'"));
+});