Added

• HLS and MPEG-DASH Streaming Engine (hya-stream, crates/hydra-stream): Introduced hya-stream, a standalone media streaming engine and manifest parser designed for high-performance chunk assembly and live stream capture:
• HLS Protocol Support: Full parser for Master and Media playlists (#EXTM3U, #EXT-X-STREAM-INF, #EXT-X-MEDIA, #EXT-X-MAP, #EXT-X-KEY, #EXT-X-BYTERANGE, #EXT-X-DISCONTINUITY), audio/video/subtitle rendition grouping, live sliding windows, and AES-128-CBC encrypted segment decryption.
• MPEG-DASH Support: Complete MPD XML parser supporting multi-period manifests, AdaptationSets, Representations, SegmentTemplates (dynamic variable substitution for $Number$, $Time$, $RepresentationID$, SegmentTimeline, SegmentList, SegmentBase), initialization segments, and multi-track demuxing.
• Segment Assembly Pipeline: High-throughput asynchronous segment fetching with connection pooling, in-order segment sequencing, live stream recording with duration limits, and automated container packaging/muxing (MP4, MKV, TS, AAC, MP3) using FFmpeg.
• CLI Media Streaming & Inspection Commands (hydra-cli): Added stream downloading and inspection capabilities to the CLI:
• --stream / --stream-quality <QUALITY>: Select target stream resolution and quality (e.g. best, 1080p, 720p, 480p, 360p, worst, audio_only, or custom bitrate).
• --stream-container <CONTAINER>: Specify output media container format (mp4, mkv, ts, aac, mp3).
• --stream-inspect / -i: Probe remote HLS/DASH streams and display formatted tables of available video/audio streams, bitrates, resolutions, codecs, and durations without downloading.
• --stream-duration <DURATION>: Set maximum recording duration for live streams (e.g., 30m, 2h).
• --stream-live: Force live stream capture mode.
• --stream-audio-track <TRACK> / --stream-video-track <TRACK>: Explicitly select target audio and video track IDs.
• hya Command Shorthand & Unified Symlinks (hydra-cli, packaging targets): Added hya as an official first-class binary command and symlink alias across all installation methods and package formats (Arch Linux AUR, Debian/Ubuntu .deb, Fedora .rpm, Linux AppImage, macOS .dmg/.pkg, Homebrew formula, Windows NSIS installer, and shell/PowerShell install scripts). Generated native shell completion scripts for both hydra and hya aliases (Bash, Zsh, Fish, PowerShell, Elvish) and added the hya.1 man page.
• GUI Stream Probing & Media Track Selection (hydra-gui):
• Integrated automated stream probing into the *Add URL* dialog when pasting HLS (.m3u8) or DASH (.mpd) links, presenting stream variant details (resolutions, bitrates, codecs), audio track selection dropdowns, and recording duration limit inputs.
• Added stream quality and container format preference controls directly in the *Batch Download* window.
• Added stream progress tracking in the *Download Progress* window, displaying live stream indicators, elapsed recording duration, segment counts, and active FFmpeg muxing status.
• Browser Extension Stream Sniffing & Floating Video Bar (extensions/, Chrome, Firefox, Safari, Edge, Brave):
• Bumped browser extensions to v0.3.0 with live HLS (.m3u8) and MPEG-DASH (.mpd) request sniffing and media stream capture.
• Added an in-page floating video download bar overlaid on HTML5 video elements for instant one-click downloading.
• Upgraded popup UI with media filter tabs (All, Videos, Audio, Documents, Images), live stream badges, quality selector dropdowns, and copy link actions.
• Redesigned onboarding welcome page (welcome.html) with real-time native messaging host connection testing and troubleshooting guides.
• Added support for Flatpak and Snap browser profile locations on Linux.
• Linux AppImage Packaging & In-App Self-Updates (scripts/package-appimage.sh, hydra-updater, CI):
• Added official multi-architecture Linux AppImage releases (x86_64 and aarch64) bundling all required dependencies, desktop integration, icons, and native messaging host manifests.
• Added in-app AppImage self-updating via hydra-updater with zsync differential binary updating, atomic single-file replacement, and privilege elevation support (pkexec / sudo) for system installations.
• Integrated AppImage autostart registration and desktop launcher creation.
• Structured GUI Logging & In-App Log Viewer (hydra-gui):
• Added high-performance asynchronous structured logging with diagnostic startup banners (OS version, architecture, Hydra build, graphics/desktop environment).
• Added automatic real-time sensitive data redaction to sanitize authentication tokens, authorization headers, passwords, and private query parameters.
• Added an interactive in-app Log Viewer modal accessible via *Help → View Logs* and the native macOS menu bar, featuring log level filtering (Trace, Debug, Info, Warn, Error), text search, and clipboard export.
• Added a direct *Help → Report Issue* action to streamline bug reporting with environment context.
• Close to System Tray Option (hydra-gui): Added a *Close to system tray instead of exiting* option under *Options → General*, enabling users to minimize the application to the system tray upon closing the main window without interrupting active downloads.
• Automatic Native Messaging Host Installer (hydra-gui): Added automated browser native messaging host manifest registration on GUI startup for Chrome, Chromium, Firefox, Microsoft Edge, Brave, Vivaldi, Opera, and Tor, with connectivity status in *Options → Extensions*.
• Turkish Localization (hydra-gui): Added full Turkish (tr) language translation catalog across all menus, dialogs, settings, and notifications, expanding total supported GUI locales to 15.
• Documentation & Man Pages: Added hydra-host.1 man page for the native messaging host protocol, crates/hydra-stream/README.md for stream engine architecture, and updated Linux AppImage guides.

Fixed

• Remote File Modification Timestamp Preservation (hydra-gui): Fixed timestamp loss on completed downloads by extracting the Last-Modified HTTP header independently of cache validators and applying the exact remote modification timestamp to downloaded files (set_mtime) after final renaming when the *Preserve file date/time* setting is enabled.
• Fedora Copr Dynamic Version Rendering (scripts/render-rpm-spec.sh, CI): Fixed Fedora Copr SRPM build failures by dynamically rendering the version macro from Cargo manifests into hydra.spec before generating source RPMs.
• Cryptographic Key Safety in Test Suites (hydra-stream): Eliminated hard-coded cryptographic test keys and constant initialization vectors in unit tests.
• Crates.io Publishing Pipeline for Stream Engine (.github/workflows/publish-crates.yml, CI): Added hya-stream to the crates.io publishing workflow, dependency verification, and index synchronizers.

Changed & Refactored

• Pooled Object Fetching & Typed Redirects (hya-net): Added fetch_object to hydra-net for efficient pooled HTTP connection reuse during single-object and playlist fetches, along with typed RedirectError for explicit hop limit and redirect loop handling.
• Multi-Language Localization Updates (hydra-gui, extensions/): Comprehensively updated and synchronized translation strings across all 15 supported locales (ar, de, en, es, fa, fr, he, ja, ko, nl, pt-BR, ru, tr, zh, zh-Hant), including a French translation overhaul and new strings for stream downloads, FFmpeg status, log viewer, close-to-tray, and extension diagnostics.