docs: add v2.0.1 release notes to CHANGELOG

Documents image upload pipeline, OneDrive integration, full personal
info profile form, demo→coming-soon label sweep, and Android build
version fix (versionCode/versionName now sourced from pubspec).

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

CHANGELOG.md

@@ -6,6 +6,41 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ---
 
+## [2.0.1] - 2026-04-10
+
+Version 2.0 — public release milestone. Full backend integration, real image upload pipeline, complete personal profile system, and production Android build infrastructure.
+
+### Added
+- **Real image upload pipeline** (`lib/core/api/api_client.dart`): `uploadFile()` method uses `http.MultipartRequest` with explicit MIME type detection from file extension. Supports JPEG, PNG, WebP, MP4, MOV. Files upload to Node.js `/api/v1/upload/file` → OneDrive via Microsoft Graph API, returning a shareable anonymous link.
+- **Contribute image upload to OneDrive** (`lib/features/gamification/services/gamification_service.dart`): `submitContribution()` now uploads all selected images before submitting the event form. Uploaded file metadata (including OneDrive share URL) is passed as `media` array in the contribution payload — replacing the broken device-path-as-string approach.
+- **Upload endpoint constant** (`lib/core/api/api_endpoints.dart`): `ApiEndpoints.uploadFile` pointing to `$_nodeBase/v1/upload/file`.
+- **Full personal info form in Edit Profile sheet** (`lib/screens/profile_screen.dart`):
+  - First Name, Last Name fields
+  - Email (read-only, locked from direct edit)
+  - Phone number field
+  - District picker with 183-day change cooldown — shows next-change date when locked
+  - Place, Pincode, State, Country fields
+  - All fields loaded from SharedPreferences cache and API on open; saved via `PATCH /api/user/update-profile/`
+
+### Changed
+- **App version** displayed in Settings → About updated to `2.0.1(b)` (`lib/screens/settings_screen.dart`).
+- **All "(demo)" labels replaced with "(coming soon)"** across the app:
+  - `settings_screen.dart`: Help button snackbar, Edit Profile snackbar, Privacy Policy subtitle
+  - `booking_screen.dart`: Tickets booked, Scanner, Chat, Call snackbars
+  - `tickets_booked_screen.dart`: Scanner, Chat/WhatsApp, Call snackbars
+  - `calendar_screen.dart`: Notifications snackbar
+- **`pubspec.yaml` version bumped** to `2.0.1+21` (version name `2.0.1`, build code `21`).
+
+### Fixed
+- **Android build version override** (`android/app/build.gradle.kts`): Removed hardcoded `versionCode = 17` and `versionName = "1.6.1(p)"` — both now read from `flutter.versionCode` / `flutter.versionName` (sourced from `pubspec.yaml`). This was causing Play Store rejections ("version code 17 already used") on every release build.
+- **`http_parser` dependency added** (`pubspec.yaml`): Required for explicit `MediaType` MIME typing in `MultipartRequest`. Without it, file uploads defaulted to `application/octet-stream` and were rejected by the Node.js multer middleware.
+
+### Infrastructure
+- **Production AAB built and signed** with `upload-keystore-new.jks` — build 20, version name `2.0` — submitted to Google Play Console.
+- **`build.gradle.kts` signing config** reads `KEYSTORE_PASSWORD`, `KEY_ALIAS`, `KEY_PASSWORD` from `gradle.properties` or environment variables (no secrets in source).
+
+---
+
 ## [1.6.1] - 2026-04-04
 
 Phase 4 — animation polish and final feature gaps. Flutter app reaches full feature parity with Consumer Web App v1.4.9.