v1.0.7: updater, website button, timer sync indicator, server flow fix

- App: manual update checker (GitHub API, Play Store redirect)
- App: website button in sidebar
- App: timer_box shows Connecting/Syncing spinner during handshake
- App: synced app_config.example.dart with app_config.dart
- Sidebar: 6 rows (added Website, Check for updates)
- Server: add_vless_client now includes flow xtls-rprx-vision
- Deps: added package_info_plus
- Version bump: 1.0.6+10 → 1.0.7+11
- CHANGELOG.md created

CHANGELOG.md

@@ -0,0 +1,33 @@
+# Changelog
+
+All notable changes to the ReVoltVPN Flutter app.
+Versions follow [semver](https://semver.org/): MAJOR.MINOR.PATCH
+
+---
+
+## [1.0.7] — Unreleased
+
+### Added
+- **Manual update checker** — "Check for updates" button in sidebar
+  - Uses GitHub Releases API to find the latest version
+  - Up to date → snackbar "✓ Up to date (v1.0.7)"
+  - Update available → opens Play Store or GitHub releases page immediately (no dialogs)
+- **Website button** in sidebar → opens `https://getrevolt.app`
+
+### Changed
+- Sidebar now has 6 rows: Ad Consent, Privacy Policy, About, Discord, Website, Check for updates
+
+### Dependencies
+- `package_info_plus` added to pubspec — for reading the local version from the app bundle
+
+---
+
+## [1.0.6] — Previous release
+
+- VLESS + Xray Reality tunnel with XTLS-Vision
+- 60 min session, 4 GB throttle
+- Support top-up: +30 min +2 GB via rewarded ad
+- Server health dot, speed display, countdown timer
+- Persistent Android notification
+- Glass-morphism dark UI with yellow accent
+- Right-edge sidebar with Ad Consent, Privacy, About, Discord