feat(projman): add visual output requirements to agents and commands

Add Visual Output sections to all projman files:
- 4 agent files with phase-specific headers (PLANNING, EXECUTION, CLOSING)
- 16 command files with appropriate headers

Headers use double-line box characters for projman branding:
- Planning phase: TARGET PLANNING
- Execution phase: LIGHTNING EXECUTION (+ progress block for orchestrator)
- Closing phase: FLAG CLOSING
- Setup commands: GEAR SETUP

Closes #273, #274

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/commands/labels-sync.md

@@ -158,6 +158,19 @@ When creating missing labels, match the format used by existing labels in the re
 - Ensure you're running in a directory with a git repository
 - Check that the `origin` remote is configured
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+╔══════════════════════════════════════════════════════════════════╗
+║  📋 PROJMAN                                                      ║
+║  Labels Sync                                                     ║
+╚══════════════════════════════════════════════════════════════════╝
+```
+
+Then proceed with the sync workflow.
+
 ## When to Run
 
 Run `/labels-sync` when: