test(smoke): dossier page smoke guard — assert HTTP 200 + #prab-dossier + no fatal (v1.2.0)

Adds dossier smoke test to 03-admin-plugins.spec.ts (describe block:
'WP Admin — PRAutoBlogger Article Dossier').

Guards:
- Menu-ordering regression: wrong hookname -> wp_die 404 (same class as v0.19.1 board bug)
- PHP fatal on dossier load
- Missing #prab-dossier container (template regression)
- Stage-section regression (conditional on run data existing)

Defensive strategy:
- Tries canonical staging posts 925/930 via REST API first
- Falls back to most recent post via /wp-json/wp/v2/posts
- Falls back to post_id=0 (graceful empty state) with loud test.info() annotation
- Stage-section assertions conditional: if stages present they must render; if absent
  the pre-substrate graceful state is expected (no failure)

npx playwright test --list shows 24 tests (was 23).
New test at 03-admin-plugins.spec.ts:185.
TypeScript compiles without errors.

Part of PRAutoBlogger v0.19.2 M2 milestone. Companion PR: peptiderepo/prautoblogger#158.

Agent-Session: claude-sonnet-4-6

package.json

@@ -1,6 +1,6 @@
 {
   "name": "peptide-e2e",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Playwright smoke tests for peptiderepo.com (staging + production)",
   "private": true,
   "scripts": {