feat(linkedin-thought-leadership): onboarding improvements for new users

- Session-start hook: welcome message with getting-started steps on first run
- Session-start hook: prominent personalization score section when score is 0
- Router: condensed 4-option menu for users who haven't posted yet
- Post/quick commands: non-blocking readiness check for unpersonalized state
- Post-creation hook: inline 5x5x5 engagement ritual explanation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/hooks/prompts/post-creation-automation.md

@@ -16,7 +16,14 @@ Based on the day of the week, suggest the next optimal posting window:
 - Weekend: 10-11 AM CET (lower reach but less competition)
 
 **3. 5x5x5 Engagement Reminder**
-Remind: 'Before posting, spend 15-20 minutes on 5x5x5 pre-engagement: find 5 people with overlapping audiences, comment thoughtfully on their recent posts.'
+Remind the user about the 5x5x5 engagement ritual:
+
+> **5x5x5 Engagement Ritual** (15-20 min before AND in the first hour after posting):
+> - **5 comments** — find 5 people with overlapping audiences and leave thoughtful comments on their recent posts
+> - **5 connection requests** — send personalized requests to people who engaged with your niche today
+> - **5 replies** — reply to every comment on YOUR post within the first hour
+>
+> This signals active participation to LinkedIn's algorithm and boosts your post's initial distribution.
 
 **4. Content Logging**
 Note: The post topic and hook should be logged to the state file when the session ends (handled by Stop hook).