feat(v0.1.4): Fix i18n imports + Default open registration

## Changes

### i18n Module Fixes
- Fix import paths in service.ts, languageSelector.tsx, header.tsx, base.tsx, results.tsx
- Change from '../i18n' to '../i18n/index' or './index' for proper module resolution

### Registration (Breaking Change)
- Change ACCOUNT_REGISTRATION default from false to true (out-of-box ready)
- Login and Register pages now both visible by default

### Version Bump
- Update package.json to v0.1.4
- Update CHANGELOG.md with v0.1.4 release notes
- Update README.md and docs with new version numbers

### Build Verification
- bun run build: PASSED
- Docker build: PASSED
- TypeScript compilation: PASSED (no errors)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "convertx-frontend",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "scripts": {
     "dev": "bun run --watch src/index.tsx",
     "hot": "bun run --hot src/index.tsx",