docs: add phase 32 SEO foundation to the roadmap

.planning/STATE.md

@@ -5,12 +5,12 @@ current_phase: "19.7"
 current_phase_name: Generic MCP module (INSERTED)
 status: verifying
 stopped_at: "Phase 19.7 verified human_needed (5 UAT items); next: /msd-verify-work 19.7"
-last_updated: "2026-10-23T20:05:29.470Z"
+last_updated: "2026-10-24T14:06:46.399Z"
 last_activity: 2026-10-23
 last_activity_desc: "Completed 19.7-08: plugin gap closure, E-1 logo, E-2 member token scopes; paused before 19.7-09"
-state_head: 85a137df246fc218ab5f463af21881d7659f7ce2
+state_head: 223f87e0f17721c37ac7150f3daa32e4c913ea7c
 progress:
-  total_phases: 45
+  total_phases: 46
   completed_phases: 37
   total_plans: 242
   completed_plans: 238
@@ -314,6 +314,7 @@ Progress: [████████░░] 82%
 - Phase 19.4.1 inserted after Phase 19.4: Early public demo on demo.summercms.io: today's 16 shared plugins on rome, demo accounts, journal/presentations/quizzes/OIDC pages, backend by request; Phase 20 narrows to the chat family (URGENT)
 - Phase 32 added: Console commands overhaul: diary logging module, bonfire global flags and Artisan-grade help, sweep of all commands, tests
 - Phase 19.6.1 inserted after Phase 19.6: Backend Administrators screen: admins and roles CRUD in cabana (gap found while planning 19.7: no screen to manage backend users or set the frontend link) (URGENT)
+- Phase 32 added: SEO foundation: per-record and global SEO, structured data per page type, sitemap boost and HTML sitemap, pagination, redirects, robots.txt, canonical, meta robots, social tags, headings, hreflang, noindex policy, SSR for headless frontends
 
 ### Decisions