Humanize admin user guide and archive scratch plans

Rewrite the admin USER_GUIDE opening, strip emoji decoration from live
guides, and keep historical PHOTO_VIEWER/FIX plans under docs/archive.

docs/DEPLOYMENT.md

@@ -1,12 +1,11 @@
-# PunimTag Deployment Guide
+# Deployment
 
-**Last Updated:** January 6, 2026
+Deploy PunimTag to development or production. Homelab host and Caddy details
+live in the private ansible repo.
 
-This guide covers deployment of PunimTag to development and production environments.
+Last reviewed: January 6, 2026.
 
----
-
-## Table of Contents
+## Table of contents
 
 1. [Prerequisites](#prerequisites)
 2. [Development Server Deployment](#development-server-deployment)
@@ -44,7 +43,7 @@ This guide covers deployment of PunimTag to development and production environme
 
 ---
 
-## Development Server Deployment
+## Development server deployment
 
 ### Step 1: Build Applications
 
@@ -277,7 +276,7 @@ sudo systemctl status punimtag-worker
 
 ---
 
-## Production Deployment
+## Production deployment
 
 ### Additional Production Considerations
 
@@ -361,7 +360,7 @@ server {
 
 ---
 
-## Environment Configuration
+## Environment configuration
 
 ### Required Environment Variables
 
@@ -402,7 +401,7 @@ NEXTAUTH_SECRET=your-nextauth-secret
 
 ---
 
-## Service Management
+## Service management
 
 ### Systemd Commands