feat(plugins): add Visual Output headers to all other plugin commands

Add single-line visual headers to 66 command files across 10 plugins:
- clarity-assist (2 commands): 💬
- claude-config-maintainer (5 commands): ⚙️
- cmdb-assistant (11 commands): 🖥️
- code-sentinel (3 commands): 🔒
- contract-validator (5 commands): ✅
- data-platform (10 commands): 📊
- doc-guardian (5 commands): 📝
- git-flow (8 commands): 🔀
- pr-review (7 commands): 🔍
- viz-platform (10 commands): 🎨

Each command now displays a consistent header at execution start:
┌────────────────────────────────────────────────────────────────┐
│  [icon] PLUGIN-NAME · Command Description                       │
└────────────────────────────────────────────────────────────────┘

Addresses #275 (other plugin commands visual output)

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

plugins/pr-review/commands/initial-setup.md

@@ -4,6 +4,18 @@ description: Interactive setup wizard for pr-review plugin - configures Gitea MC
 
 # PR Review Setup Wizard
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Setup Wizard                                      │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the setup.
+
 This command sets up the pr-review plugin. It shares the Gitea MCP server with projman, so if you've already run `/initial-setup` for projman, most of the work is done.
 
 ## Important Context

plugins/pr-review/commands/pr-diff.md

@@ -1,5 +1,17 @@
 # /pr-diff - Annotated PR Diff Viewer
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Diff Viewer                                       │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the diff display.
+
 ## Purpose
 
 Display the PR diff with inline annotations from review comments, making it easy to see what feedback has been given alongside the code changes.

plugins/pr-review/commands/pr-findings.md

@@ -1,5 +1,17 @@
 # /pr-findings - Filter Review Findings
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Findings                                          │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the findings display.
+
 ## Purpose
 
 List and filter findings from a previous PR review by category, severity, or confidence level.

plugins/pr-review/commands/pr-review.md

@@ -1,5 +1,17 @@
 # /pr-review - Full Multi-Agent Review
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Full Review                                       │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the review.
+
 ## Purpose
 
 Conduct a comprehensive pull request review using specialized agents for security, performance, maintainability, and test coverage.

plugins/pr-review/commands/pr-summary.md

@@ -1,5 +1,17 @@
 # /pr-summary - Quick PR Summary
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Quick Summary                                     │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the summary.
+
 ## Purpose
 
 Generate a quick summary of PR changes without conducting a full multi-agent review.

plugins/pr-review/commands/project-init.md

@@ -4,6 +4,18 @@ description: Quick project setup - configures only project-level settings for PR
 
 # Project Initialization (PR Review)
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Project Setup                                     │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the setup.
+
 Fast setup for a new project when system-level configuration is already complete.
 
 **Use this when:**

plugins/pr-review/commands/project-sync.md

@@ -4,6 +4,18 @@ description: Sync project configuration with current git remote - use after chan
 
 # Project Sync (PR Review)
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  🔍 PR-REVIEW · Project Sync                                      │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the synchronization.
+
 Updates project configuration when the git remote URL has changed.
 
 **Use this when:**