Initial scaffolding: PS_Launcher v0.2

Client (C# / .NET 8 / WPF, MVVM via CommunityToolkit.Mvvm):
- PSLauncher.App: WPF UI dark theme (Epic-style sidebar + hero + big play button)
  with UpdateAvailableDialog rendering Markdown release notes via Markdig.Wpf.
- PSLauncher.Core: services for installation registry (scans Proserve v{X.Y.Z}/),
  process launcher, manifest fetch, SHA-256 integrity, HTTP download with
  progress, ZIP install via .tmp + atomic rename, update orchestrator.
- PSLauncher.Models: RemoteManifest, InstalledVersion, LocalConfig DTOs.

Server (PHP 8 for OVH mutualisé, deployed under www/PS_Launcher/):
- Front controller + routes /manifest and /releasenotes/{version}.
- Static signed-manifest workflow with tools/sign-manifest.php CLI to
  recompute SHA-256 and sizeBytes after each ZIP upload.
- .htaccess: HTTPS redirect, rewrite, security headers.
- config.example.php template; real config.php is gitignored.

Cohabiting versions: each release lives in its own Proserve v{version}/ folder
under installRoot. Old versions are never deleted automatically.

Roadmap: v0.3 = HTTP Range resume + Polly retry + state.json,
v0.4 = MySQL license + Ed25519 signatures + DPAPI, v0.5 = settings/UX polish.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -0,0 +1,54 @@
+# PS_Launcher
+
+Launcher Windows pour l'application UE5 **PROSERVE** : gère plusieurs versions cohabitantes,
+téléchargement et installation de nouvelles versions depuis un serveur, validation de license,
+release notes.
+
+## Composants
+
+- **`src/`** — Solution C# / .NET 8 / WPF (Visual Studio 2022 + SDK .NET 8 requis)
+  - `PSLauncher.App` : UI WPF (style Epic Games Launcher)
+  - `PSLauncher.Core` : services (Manifest, Download, Install, Process…)
+  - `PSLauncher.Models` : DTOs partagés
+- **`server/`** — Code serveur PHP 8 (à déployer sous `www/PS_Launcher/` sur OVH mutualisé)
+
+## Démarrage rapide (dev)
+
+```
+dotnet build PS_Launcher.sln
+dotnet run --project src/PSLauncher.App
+```
+
+Pour produire un binaire autonome distribuable (un seul .exe ~70 Mo) :
+
+```
+dotnet publish src/PSLauncher.App -c Release
+# Sortie : src/PSLauncher.App/bin/Release/net8.0-windows/win-x64/publish/PSLauncher.exe
+```
+
+## Configuration locale
+
+Le launcher écrit sa config dans `%LocalAppData%\PSLauncher\config.json` au premier lancement.
+Édite `serverBaseUrl` pour pointer vers ton serveur :
+
+```json
+{
+  "serverBaseUrl": "https://ton-domaine.com/PS_Launcher/api",
+  "installRoot": "C:\\ASTERION\\GIT\\PS_Launcher\\ASTERION_VR"
+}
+```
+
+## État (roadmap)
+
+- ✅ **v0.1** — Scan + lancement de versions installées
+- ✅ **v0.2** — Manifest distant, download ZIP, install cohabitante, release notes Markdown
+- ⏳ **v0.3** — Reprise (HTTP Range), retry Polly, state.json
+- ⏳ **v0.4** — License (MySQL + Ed25519 + DPAPI)
+- ⏳ **v0.5** — Settings, suppression manuelle versions, toasts
+- ⏳ **v1.0** — Auto-update launcher, MSI installer
+
+Voir le plan détaillé pour la roadmap complète.
+
+## Licence / interne
+
+Repo interne ASTERION. Ne pas distribuer.