docs(phase-08): complete phase execution

.planning/STATE.md

@@ -2,9 +2,9 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: verifying
-stopped_at: Completed 08-10-PLAN.md (Phase 8 closed; Playwright UI matrix gap carried forward)
-last_updated: "2026-09-23T23:03:36.043Z"
+status: ready_to_plan
+stopped_at: Phase 08 complete (10/10) — ready to discuss Phase 09
+last_updated: 2026-09-23T23:13:48.826Z
 last_activity: 2026-09-23
 progress:
   total_phases: 15
@@ -21,13 +21,13 @@ progress:
 See: .planning/PROJECT.md (updated 2026-09-16)
 
 **Core value:** An existing WinterCMS-shaped app can be ported plugin by plugin to a single Go binary without its frontend noticing: the PHP version's API contract is the acceptance test.
-**Current focus:** Phase 08 — oauth2-1-authorization-server
+**Current focus:** Phase 09 — backend admin authentication and schema pipeline
 
 ## Current Position
 
-Phase: 08 (oauth2-1-authorization-server) — EXECUTING
-Plan: 10 of 10
-Status: Phase complete — ready for verification
+Phase: 09
+Plan: Not started
+Status: Ready to plan
 Last activity: 2026-09-23
 
 Progress: [██████████] 100%
@@ -36,7 +36,7 @@ Progress: [██████████] 100%
 
 **Velocity:**
 
-- Total plans completed: 56
+- Total plans completed: 66
 - Average duration: 21 min
 - Total execution time: 104 min
 
@@ -51,6 +51,7 @@ Progress: [██████████] 100%
 | 05 | 6 | - | - |
 | 06 | 14 | - | - |
 | 7 | 8 | - | - |
+| 08 | 10 | - | - |
 
 **Recent Trend:**