docs: GPLv2 license, README, attribution

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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+# hyprsunset-qt
+
+A Qt6 GUI to edit `~/.config/hypr/hyprsunset.conf`, fetch sunrise/sunset times for your location, and restart the hyprsunset daemon.
+
+## Features
+
+- Profile manager: add, remove, and edit day/night profiles
+- Auto or manual geolocation
+- Fetch sunrise -> day / sunset -> night times
+- Live preview via `hyprctl`
+- Save + restart daemon
+
+## Requirements
+
+- Python 3.11+
+- PyQt6
+- A running hyprsunset (v0.3.3+) under Hyprland
+
+## Install
+
+```
+pip install .
+```
+
+Or run directly without installing:
+
+```
+python3 -m hyprsunset_qt
+```
+
+Once installed, the app is also available via the `hyprsunset-qt` entry point.
+
+## Configuration
+
+hyprsunset-qt reads and writes two files:
+
+- `~/.config/hypr/hyprsunset.conf` — the hyprsunset daemon config. This file is rewritten on save; comments in it are regenerated by the app.
+- `~/.config/hyprsunset-qt/config` — the app's own settings, in INI format. Stores location (`lat`/`lon`/`auto_detect`), the sunrise/sunset cache path, and the daemon command.
+
+The sunrise/sunset JSON cache lives under `~/.config` (not `~/.cache`), and is only refreshed when you press Fetch manually.
+
+## Credits
+
+- Sunrise/sunset times provided by the free [sunrise-sunset.org](https://sunrise-sunset.org/) API.
+- IP geolocation by [ip-api.com](https://ip-api.com/).
+
+## License
+
+GPLv2-only. Copyright (C) 2026 Danilo M. <danix@danix.xyz>. See [LICENSE](LICENSE).
+
+## Development Approach
+
+This project is developed using AI-assisted tools. Code is generated with the help of AI based on human-provided specifications, design decisions, and iterative feedback.
+
+All contributions are reviewed, tested, and curated by the maintainer before being included in the codebase. AI is used as a productivity and exploration tool, while human oversight remains central to all decisions.
+
+The goal is to combine the flexibility of AI-assisted development with standard open-source practices such as transparency, review, and accountability.