Add Tauri launcher with Svelte UI

- Accounts: panel login/sign-up, Microsoft device-code sign-in, offline
  play; tokens encrypted with a key kept in the OS credential store
- Home: instance rail, live server status, news feed, social links,
  Play button with download progress, speed and ETA
- Full settings: accounts, memory/resolution/after-launch behaviour,
  Java and GC presets, Minecraft keybind editor applied to options.txt,
  theme overrides, storage manager, self-update via GitHub releases
- Game console, crash dialog with hints, per-instance overrides
- Live admin branding (colours, fonts, backgrounds, custom CSS)
- Online install tests for vanilla/Fabric/Quilt/Forge/NeoForge (CI)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011ARcGWxLx21FwXJ3yfGriS

launcher/src-tauri/tauri.conf.json

@@ -0,0 +1,50 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "ScopeNet Launcher",
+  "version": "0.1.0",
+  "identifier": "net.scopenet.launcher",
+  "build": {
+    "beforeDevCommand": "npm run dev",
+    "devUrl": "http://localhost:1420",
+    "beforeBuildCommand": "npm run build",
+    "frontendDist": "../dist"
+  },
+  "app": {
+    "withGlobalTauri": false,
+    "windows": [
+      {
+        "label": "main",
+        "title": "ScopeNet Launcher",
+        "width": 1120,
+        "height": 700,
+        "minWidth": 960,
+        "minHeight": 600,
+        "decorations": false,
+        "shadow": true,
+        "center": true,
+        "visible": false,
+        "backgroundColor": "#0b0d17"
+      }
+    ],
+    "security": {
+      "csp": "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' https: http: data: blob:; media-src 'self' https: http: blob:; font-src 'self' data:; connect-src 'self' ipc: http://ipc.localhost"
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": ["nsis"],
+    "publisher": "ScopeNet",
+    "category": "Game",
+    "shortDescription": "Minecraft launcher",
+    "longDescription": "A fast, customisable Minecraft launcher connected to your community's admin panel.",
+    "icon": ["icons/32x32.png", "icons/128x128.png", "icons/128x128@2x.png", "icons/icon.icns", "icons/icon.ico"],
+    "windows": {
+      "webviewInstallMode": { "type": "downloadBootstrapper", "silent": true },
+      "nsis": {
+        "installMode": "currentUser",
+        "displayLanguageSelector": false,
+        "installerIcon": "icons/icon.ico"
+      }
+    }
+  }
+}