Bump version to 0.1.13 and remove unused mobile.rs

- Update version in tauri.conf.json to 0.1.13
- Remove incomplete and unused mobile.rs file

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "haex-hub",
-  "version": "0.1.4",
+  "version": "0.1.13",
   "identifier": "space.haex.hub",
   "build": {
     "beforeDevCommand": "pnpm dev",