Initial commit — TANINUX (camel): management app + distro packaging

- app: GTK System Settings (tsettings) + Software Hub (thub) + TUI
- distro/: camel.toml manifest + MANIFEST.md (Arch + [tanin] repo model)
- packaging/: taninux, tanin-desktop (niri metapackage), tanin-greet,
  tanin-libadwaita, tanin-setup
- docs/, data/, LICENSE (GPL-3.0-or-later)

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

packaging/tanin-greet/README.md

@@ -0,0 +1,47 @@
+# tanin-greet
+
+TANINUX's custom **GTK4 greeter** for greetd. Built because ReGreet's layout is
+fixed — this gives full control to match the design:
+
+- a **black top bar** like the eww topbar (`TANINUX` · clock · power)
+- a **wallpaper** background under a dark scrim
+- **user + password** centered as pills (Fuji violet focus ring, Enter submits)
+- the **session selector** tucked tiny in the **bottom-right corner**
+
+It speaks the greetd IPC directly (create_session → auth → start_session) and is
+hosted by `cage`.
+
+## Files
+- `tanin-greet`      → `/usr/bin/tanin-greet` — the GTK4 app (PyGObject)
+- `tanin-greet.css`  → `/etc/greetd/tanin-greet.css` — the look (mirrors `eww.scss`)
+- `config.toml`      → `/etc/greetd/config.toml` — greetd; `cage -s -- tanin-greet`
+- `dev/`             → preview helper + greetd mock (not packaged)
+
+## Preview (no logout, no real auth)
+```sh
+./dev/preview.sh                 # uses your current wallpaper path
+./dev/preview.sh /path/to/wall.jpg
+# screenshot lands at /tmp/tanin-greet.png ; override output with GREET_OUTPUT=HDMI-A-1
+```
+The greeter renders even without greetd; `dev/mockgreetd.py` provides a fake
+socket so the password prompt and login flow work for a full dry-run.
+
+## Env overrides (used by the preview)
+- `TANIN_GREET_CSS`       stylesheet path (default `/etc/greetd/tanin-greet.css`)
+- `TANIN_GREET_BG`        wallpaper path  (default `/usr/share/backgrounds/tanin/login.jpg`)
+- `TANIN_GREET_SESSIONS`  sessions dir    (default `/usr/share/wayland-sessions`)
+- `TANIN_GREET_BRAND`     top-bar text    (default `TANINUX`)
+
+## Install (on the distro)
+```sh
+makepkg -si
+sudo systemctl enable greetd     # disable any other DM first
+```
+Drop a login wallpaper at `/usr/share/backgrounds/tanin/login.jpg` (or ship a
+`tanin-backgrounds` package). Without one, the greeter shows a dark scrim.
+
+## Notes
+- Sessions are read from `/usr/share/wayland-sessions/*.desktop`; Niri is the
+  default selection. Users are read from `/etc/passwd` (uid 1000–65533, real shell).
+- Icons (`avatar-default-symbolic`, `system-shutdown-symbolic`) come from
+  `adwaita-icon-theme`.