feat: v1.3.0 — Steam path override, game folder scanner

- electron/settings.ts: persist steamPath + gameFolders in settings.json
- electron/scanner.ts: scan folders 2 levels deep for .exe files,
  filter out known non-game binaries (uninstall/setup/redist/crash handlers)
- electron/steam.ts: detectSteamGames(customPath?) — uses user path when set
- electron/main.ts: new IPC handlers — dialog:pick-folder, settings:get/set-steam-path/
  add-folder/remove-folder, scanner:scan/import
- src/components/SettingsPanel.tsx: drawer UI — Steam path picker with auto-resolved
  path display, game folders list, per-folder scan with checkbox selection,
  one-click import of selected executables
- src/App.tsx: SlidersHorizontal button opens SettingsPanel, reload on import

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "club-launcher",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Game launcher for computer club",
   "author": "houseassassin",
   "main": "out/main/main.js",