docs(gsd): update post-milestone next-step guidance

.planning/ROADMAP.md

@@ -79,4 +79,5 @@ Plans:
 - [x] 07-02-PLAN.md — gap closure：修复 ContextMenu 自动引用、提示前缀唯一化、Skill 使用 id 拼接
 
 ---
-*Next command:* `/gsd-verify-work`
+*Milestone status:* `complete`
+*Next command:* `/gsd-new-milestone`

.planning/STATE.md

@@ -20,13 +20,13 @@ progress:
 See: .planning/PROJECT.md (updated 2026-04-07)
 
 **Core value:** Keep the frontend visually familiar while preserving and hardening new-system behavior end to end.
-**Current focus:** Phase 07 — phase-06-mention-upload
+**Current focus:** Milestone v1.0 completed
 
 ## Workflow State
 
-- Current workflow: execute-phase completed (phase 07)
-- Next workflow: verify-work
-- Next command: /gsd-verify-work 7
+- Current workflow: milestone complete (v1.0)
+- Next workflow: new-milestone
+- Next command: /gsd-new-milestone
 
 ## Artifacts
 

.planning/milestones/v1.0-ROADMAP.md

@@ -79,4 +79,5 @@ Plans:
 - [x] 07-02-PLAN.md — gap closure：修复 ContextMenu 自动引用、提示前缀唯一化、Skill 使用 id 拼接
 
 ---
-*Next command:* `/gsd-verify-work`
+*Milestone status:* `complete`
+*Next command:* `/gsd-new-milestone`