chore: establish YCode replication baseline and TODO

scripts/rea/tool-result-styles-regression.mjs

@@ -0,0 +1,36 @@
+import assert from 'node:assert/strict'
+import fs from 'node:fs'
+import crypto from 'node:crypto'
+import postcss from 'postcss'
+
+const original = fs.readFileSync('.tmp/rea-css-recovered/src-CyXHA0IC.css', 'utf8')
+assert.equal(crypto.createHash('sha256').update(original).digest('hex'),
+  'a5e26b537bb50323aefbf25abddad52e288dd3868598be8d255d70886fe77cfe')
+const output = fs.readFileSync('src/renderer/src/workbuddy/conversation/tool-result-source.css', 'utf8')
+const ancestors = node => {
+  const chain = []
+  for (let parent = node.parent; parent && parent.type !== 'root'; parent = parent.parent) {
+    if (parent.type === 'atrule') chain.unshift(`@${parent.name} ${parent.params}`)
+  }
+  return chain
+}
+const collect = css => {
+  const records = []
+  postcss.parse(css).walkRules(rule => {
+    if (!rule.selector.includes('.cr-tool-exp__content-shell') && !rule.selector.includes('.cr-tool-btn')) return
+    records.push({ selector: rule.selector, conditions: ancestors(rule),
+      declarations: rule.nodes.map(node => node.toString()) })
+  })
+  return records
+}
+const actual = collect(output)
+assert.deepEqual(actual, collect(original), 'tool motion declarations must retain their original media/support conditions and order')
+const reduced = actual.filter(rule => rule.declarations.includes('transition:none'))
+assert.equal(reduced.length, 3)
+assert.ok(reduced.every(rule => rule.conditions.includes('@media (prefers-reduced-motion:reduce)')),
+  'reduce-only motion suppression must never become a global rule')
+assert.ok(actual.some(rule => !rule.conditions.length && rule.declarations.some(value => value.includes('height .28s'))))
+assert.ok(actual.some(rule => rule.selector === '.cr-tool-btn' && rule.declarations.includes('height:20px')))
+assert.ok(actual.some(rule => rule.selector === '.cr-tool-btn--primary' && rule.declarations.some(value => value.includes('--cr-status-success'))))
+assert.ok(actual.some(rule => rule.selector === '.cr-tool-btn--danger' && rule.declarations.some(value => value.includes('--cr-status-error'))))
+console.log('Tool CSS recovery retains source approval buttons, motion declarations and media conditions.')