v0.2.0

Added

• UI languages: Swedish and English — View → Language (choice stored in settings). All user-visible strings live in src/spectraglyph/gui/i18n.py.
• Keyboard shortcuts: Ctrl+O (open audio), Ctrl+I (choose image), Ctrl+E (export); Help → Keyboard shortcuts… lists them. Tooltips on primary actions.
• Portable user data: When running the built .exe, presets and settings default to SpectraGlyph_data\ next to the executable (with migration from legacy %APPDATA%\SpectraGlyph once). Fallback to AppData if the folder is not writable.
• Session memory: Last folders for open/save dialogs; window geometry and splitter sizes saved on exit (settings.json).
• Large / long audio: Fast metadata probe; if duration > 2 minutes or size > 40 MB, a dialog offers loading the full file, only the first N seconds, or a custom time range; partial decode reduces load time and RAM. Progress dialog during decode + spectrogram; segment shown in the audio info line when relevant.
• CI: GitHub Actions workflow runs pytest on pushes to main and pull requests.
• Releases: Workflow builds SpectraGlyph.exe with PyInstaller and attaches the versioned binary to GitHub Releases on v* tags or preview builds (see CONTRIBUTING.md).

Changed

• Release artifacts ship as a versioned .exe on GitHub Releases (no zip wrapper by default).
• README, CONTRIBUTING, and SECURITY updated for the public repo and workflows.

Fixed

• CI / releases: extract_changelog.py forces UTF-8 stdout so the Windows release job can write GitHub Release notes that contain Unicode (for example → in menu paths) without failing.