Trigger Dosu from PR triage comments

The PR triage workflow mentioned Dosu inside inline-code formatting and before the final footer, which did not reliably wake the bot. Move the handoff so the last non-empty comment line is a plain-text @dosubot request, matching the working PR template pattern.

Constraint: GitHub bot mentions can be sensitive to markdown formatting and comment placement.

Rejected: Leave the mention as a copy-paste hint | it does not satisfy the maintainer need for automatic bot triggering.

Confidence: high

Scope-risk: narrow

Directive: Keep the generated triage comment's final non-empty line as a plain-text @dosubot request.

Tested: bun run check:policy

Tested: git diff --check

Tested: bun run check:pr

scripts/pr/pr-triage-workflow.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, test } from 'bun:test'
+import { readFileSync } from 'node:fs'
+
+const DOSU_PROMPT = '@dosubot review this PR for changed-area risk, missing tests, docs impact, desktop startup risk, and CLI core impact.'
+
+function extractCommentBodyEntries(workflow: string) {
+  const match = workflow.match(/const body = \[([\s\S]*?)\n\s*\]\.join\('\\n'\)/)
+  if (!match) {
+    throw new Error('Could not find PR triage comment body array')
+  }
+
+  return match[1]
+    .split('\n')
+    .map((line) => line.trim())
+    .filter((line) => line.startsWith("'") || line.startsWith('`'))
+}
+
+describe('PR triage workflow comment', () => {
+  test('ends with a plain-text Dosu mention so the bot is triggered', () => {
+    const workflow = readFileSync('.github/workflows/pr-triage.yml', 'utf8')
+    const entries = extractCommentBodyEntries(workflow)
+    const nonEmptyEntries = entries.filter((entry) => !/^['`]['`],?$/.test(entry))
+    const lastEntry = nonEmptyEntries.at(-1)
+
+    expect(lastEntry).toBe(`'${DOSU_PROMPT}',`)
+    expect(workflow).not.toContain(`\`${DOSU_PROMPT}\``)
+  })
+})