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EchoHub/docs/changelog/v0.2.5.md
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# v0.2.5 - Audio Playback, File Downloads & IRC Fixes
## Features
### Audio Message Support
- New `Audio` message type — uploaded audio files (`.mp3`, `.wav`, `.ogg`, `.flac`, `.aac`, `.m4a`, `.wma`) are automatically detected and categorized
- TUI client renders audio messages with `♪ [Audio: filename] (Enter to play)` indicator
- Press Enter on an audio message to play it locally via `AudioPlaybackService` (NetCoreAudio)
- IRC gateway formats audio messages as `♪ [Audio: filename] url`
- Server detects audio files by extension via `FileValidationHelper.IsAudioFile()`
### File Downloads
- Press Enter on a file message in the TUI client to download it to the local machine
- `ApiClient.DownloadFileAsync()` streams file downloads from the server
- File and audio messages in the chat list now show colored indicators with interaction hints
### File Cleanup Service
- `FileCleanupService` (BackgroundService) periodically removes old uploaded files
- Configurable via `Storage:CleanupIntervalHours` (default 1h) and `Storage:RetentionDays` (default 30d)
### Data Migration Service
- `DataMigrationService` runs at startup to handle schema/data evolution
- Ensures `#general` channel and pre-existing channels are marked public
- Migrates legacy ANSI escape codes in image messages to printable color tags (`{F:RRGGBB}`, `{B:RRGGBB}`, `{X}`)
- Migrates legacy single-object `EmbedJson` to array format
- Promotes usernames listed in `Server:Admins` config to Admin role
## Fixes
### IRC Gateway
- **Fixed: IRC JOIN history replay showed encrypted gibberish** — `IrcCommandHandler.HandleJoinAsync` now decrypts channel history before formatting for IRC clients (history was encrypted for SignalR transport but sent raw to IRC)
- **Fixed: `JoinedChannels` race condition** — `IrcClientConnection.JoinedChannels` replaced with thread-safe methods (`JoinChannel`, `LeaveChannel`, `IsInChannel`, `GetJoinedChannels`) using lock synchronization; prevents crashes when broadcaster threads read while the command handler writes
- **Fixed: `RequireRegistered` fire-and-forget** — converted from sync `bool` to `async Task<bool>` (`RequireRegisteredAsync`) so the error reply is properly awaited before the handler returns
## Infrastructure
- Audio MIME types in `FilesController` (mp3, wav, ogg, flac, aac, m4a, wma)
- Test suites: ChatLine, CommandHandler, DataMigrationService, FileValidationHelper, ImageToAsciiService, IrcMessageFormatter, JwtTokenService, LinkEmbedService
- IRC abstraction layer test suite: IrcMessage parsing, IrcMessageFormatter, IrcClientConnection, IrcCommandHandler, IrcBroadcaster
- Test helpers: `TestDuplexStream`, `TestIrcConnectionFactory`, `FakeChatService`, `FakeEncryptionService` for IRC unit testing without network I/O
- 214 total tests