feat: settings screen, haptic toggle, rain/lightning toggles, review docs

lib/screens/settings/settings_screen.dart

@@ -0,0 +1,56 @@
+import 'package:flutter/material.dart';
+import 'package:revoltvpn/logic/app_colors.dart';
+import 'package:revoltvpn/screens/settings/in_settings/haptic.dart';
+import 'package:revoltvpn/screens/settings/in_settings/rain.dart';
+import 'package:revoltvpn/screens/settings/in_settings/lightning.dart';
+
+// ── lib/screens/settings/settings_screen.dart ────────────────────────────────
+// Settings shell — full-screen page reached from the sidebar.
+//
+// Folder layout:
+//   lib/screens/settings/       ← this folder: settings family
+//     settings_screen.dart      ← shell: Scaffold + AppBar + ListView (this file)
+//     *_tile.dart               ← one file per setting feature (add below)
+//   lib/components/sidebar_contents/
+//     settings.dart             ← thin sidebar row that navigates here
+//
+// To add a setting:
+//   1. Create a new file in this folder, e.g. appearance_tile.dart
+//   2. Import it below
+//   3. Append it to the children list
+
+class SettingsScreen extends StatelessWidget {
+  const SettingsScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: AppColors.bgDeep,
+      appBar: AppBar(
+        backgroundColor: AppColors.bgSurface,
+        elevation: 0,
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back, color: AppColors.textWhite),
+          onPressed: () => Navigator.of(context).pop(),
+        ),
+        title: const Text(
+          'Settings',
+          style: TextStyle(
+            color: AppColors.textWhite,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+      ),
+      body: ListView(
+        padding: const EdgeInsets.symmetric(vertical: 8),
+        children: const [
+          HapticFeedbackTile(),
+          RainToggleTile(),
+          LightningToggleTile(),
+          // ── Add setting tiles here ────────────────────────────────────────
+          // Each tile imports from its own file in this folder.
+        ],
+      ),
+    );
+  }
+}