docs(19.1-02): record D-17 Render/Purify halt

- Task 1 wrote the forum policy note; forum execution waits on the D-17 module
- Do not create sm-forum-plugin until Render and Purify exist

Co-authored-by: Cursor <cursoragent@cursor.com>

.planning/STATE.md

@@ -4,11 +4,11 @@ milestone: v1.0
 current_phase: "19.1"
 current_phase_name: Chat satellites
 status: executing
-stopped_at: Completed 19.1-01-PLAN.md
-last_updated: "2026-10-18T11:21:54.803Z"
+stopped_at: 19.1-02 Task 1 done; blocked on D-17 Render/Purify
+last_updated: "2026-10-18T11:24:39.168Z"
 last_activity: 2026-10-18
 last_activity_desc: Phase 19.1 execution started
-state_head: 03591e1d6c90cc9953054214de2c4e0836c376cd
+state_head: 2740ab276cc82e0e905f115602a232ccfc136a04
 progress:
   total_phases: 41
   completed_phases: 33
@@ -879,6 +879,7 @@ Recent decisions affecting current work:
 - Phase 8 UI gate: scripts/check-phase8-ui.mjs --final-gate's real Playwright browser matrix (32 UI-SPEC scenarios) is unimplemented (deliberate fatal() at check-phase8-ui.mjs:458, never authored by 08-05); stage_ui_harness must keep failing closed until a Playwright spec is authored. User approved Phase 8 closure on 2026-09-24 with this gap carried forward -- see 08-10-SUMMARY.md and .planning/phases/08-oauth2-1-authorization-server/deferred-items.md.
 - pending: push sm-user-plugin — 12.1-05 Task 3 condition (c) failed (`git ls-remote --tags origin v0.1.3` empty). Push summercms.go master and annotated tag v0.1.3 (local on df5cace) first, then the plugin, then fonoteka.go. Recorded in 12.1-05-SUMMARY.md.
 - 16.2-05 open UAT items: re-save HTML post 1 untouched (D-03 evidence vacuous), D-19 category edit check, root vhost install (frame-src), unpublish/delete test post 105
+- D-17 Render/Purify missing: 19.1-02 halted after the D-16 forum-policy note (2740ab2). modules/ has cabana.RenderMarkdown only. Run /msd-quick in summercms.go for a markdown module exporting Render(markdown) and Purify(html) with the named forum policy, then re-run /msd-execute-phase 19.1. Do not create sm-forum-plugin until that lands.
 
 ### Quick Tasks Completed
 
@@ -933,6 +934,6 @@ Items acknowledged and carried forward from previous milestone close:
 
 ## Session Continuity
 
-Last session: 2026-10-18T11:21:54.090Z
-Stopped at: Completed 19.1-01-PLAN.md
-Resume file: None
+Last session: 2026-10-18T11:24:30.748Z
+Stopped at: 19.1-02 Task 1 done; blocked on D-17 Render/Purify
+Resume file: .planning/phases/19.1-chat-satellites/19.1-02-PLAN.md