Document full-stack setup; fix dev proxy; drop stray temp script

- README rewritten for the completed frontend: full setup/run instructions
  (Docker Compose, local dev with hot reload, prod build), pages/routes,
  API endpoints, and a consolidated environment-variable reference
- Vite dev proxy now targets 127.0.0.1 (avoids the Windows IPv6-localhost
  pitfall where the SPA could not reach the IPv4-bound API)
- Remove server/_setup.ps1 (a scratch script accidentally committed in the
  previous frontend commit) and gitignore _*.ps1 scratch files

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/_setup.ps1

@@ -1,38 +0,0 @@
-$ErrorActionPreference = 'Stop'
-$base = 'http://127.0.0.1:3000'
-$session = New-Object Microsoft.PowerShell.Commands.WebRequestSession
-
-function Req($method, $path, $bodyObj) {
-  $p = @{ Method = $method; Uri = "$base$path"; UseBasicParsing = $true; WebSession = $session; ErrorAction = 'Stop' }
-  if ($null -ne $bodyObj) { $p.Body = ($bodyObj | ConvertTo-Json -Depth 6 -Compress); $p.ContentType = 'application/json' }
-  Invoke-WebRequest @p
-}
-
-Write-Output 'waiting for health...'
-$up = $false
-for ($i = 0; $i -lt 40; $i++) {
-  try { if ((Invoke-WebRequest "$base/api/health" -UseBasicParsing).StatusCode -eq 200) { $up = $true; break } } catch {}
-  Start-Sleep -Seconds 2
-}
-if (-not $up) { Write-Output 'server never came up'; return }
-
-Req POST '/api/v1/auth/login' @{ username = 'admin'; password = 'adminpass123' } | Out-Null
-Req PUT '/api/v1/admin/site-mode' @{ mode = 'live' } | Out-Null
-
-# News
-Req POST '/api/v1/admin/posts' @{ category='news'; title='The world map enters closed testing'; excerpt='The Mysticmoon overworld is feature-complete enough for a small group to wander.'; body='<p>Travel between the three starting towns is live, moongates are seeded, and the first dungeon level is open for stress-testing.</p>'; published=$true } | Out-Null
-Req POST '/api/v1/admin/posts' @{ category='news'; title='Crafting trees and resource gathering'; excerpt='Mining, lumberjacking, and the first tier of smithing and tailoring are in.'; body='<p>Resource respawn timers are tuned for a small population.</p>'; published=$true } | Out-Null
-
-# Five on Friday
-Req POST '/api/v1/admin/posts' @{ category='five-on-friday'; title='Five on Friday #07'; body='<ol><li>Moongates now route correctly between all three regions.</li><li>The blacksmith UI got a readability pass.</li><li>Something large now lurks in the Hollow Deeps.</li><li>Next week: player housing placement rules.</li><li>The full-moon lighting in town looks lovely.</li></ol>'; published=$true } | Out-Null
-
-# Newsletter
-Req POST '/api/v1/admin/posts' @{ category='newsletter'; slug='june-2026'; title='A world you can walk across'; excerpt='The longest month of building yet - here is everything that landed.'; body='<p>June was the month Mysticmoon stopped being a set of disconnected systems and started feeling like a place.</p><h2>The overworld opens</h2><p>For the first time, testers walked the road from Mistholme to the eastern moongate.</p><h2>Crafting takes root</h2><p>Mining, lumberjacking, smithing, and tailoring all came online.</p>'; published=$true } | Out-Null
-
-# Screenshot (uses the hero image already served at /assets)
-Req POST '/api/v1/admin/posts' @{ category='screenshots'; title='Mistholme at dusk'; excerpt='The square at Mistholme, lanterns lit at dusk.'; image_url='/assets/img/uomysticmoon-main-hero.png'; published=$true } | Out-Null
-
-# Wiki body with H2 sections so the article TOC renders
-Req PUT '/api/v1/admin/wiki/new-player-guide' @{ title='New Player Guide'; body='<p>Everything you need to find your feet in your first hour on Mysticmoon.</p><h2>When you arrive</h2><p>New characters wake in <strong>Mistholme</strong>, the central starting town.</p><h2>Choosing your first skills</h2><p>You do not pick a class - you grow into one by using skills.</p><h2>Staying alive</h2><ul><li>Towns are safe. The wilderness is not.</li><li>Bank your gold and reagents often.</li><li>Keep bandages and a spare weapon.</li></ul>' } | Out-Null
-
-Write-Output 'SETUP DONE - site is live with sample content'