docs: Version 0.7.0 and CHANGELOG

- VERSION in the entry point, shown in the menu header and the bundle.
- CHANGELOG.md with every commit per version (older versions numbered per merged PR).
- README and AGENTS.md updated for the cachyos-vapor theme, the SteamOS extras and the LED driver.

CHANGELOG.md

@@ -0,0 +1,79 @@
+# Changelog
+
+All notable changes, per version and per commit. Versions follow
+[Semantic Versioning](https://semver.org/); the current one is `VERSION` in
+`setup-gamescope-boot.sh`. Versions before 0.7.0 were numbered afterwards,
+one per merged pull request.
+
+## 0.7.0 - 2026-09-24
+
+The SteamOS theme comes from CachyOS's `cachyos-vapor` package, applied with
+Vapor's own desktop layout, and gains the SteamOS desktop extras. The Steam
+Machine LED driver works on every installed kernel and survives kernel updates.
+
+- `978f5a1` **feat: SteamOS theme from cachyos-vapor with its desktop layout, plus SteamOS desktop extras**
+  - Installs `cachyos-vapor` instead of extracting Valve's `steamdeck-kde-presets`
+    into `~/.local/share`; removes it on disable if the wizard installed it.
+  - Applies the Vapor global theme with "Desktop and window layout": Steam Deck
+    wallpaper, SteamOS panel and launcher icon. Layout files are backed up and
+    restored; every key from Vapor's defaults goes through the undo journal.
+  - Restores the real previous color scheme on disable (CachyOS's BreezeDark
+    colors have no scheme name), instead of falling back to light Breeze.
+  - Registers Vapor as the dark theme, so Plasma's Dark Mode toggle shows on.
+  - Drops the extra SteamOS desktop defaults (GTK, Konsole, gsettings, panel tweaks).
+  - New SteamOS desktop extras, downloaded from Valve's newest
+    `steamdeck-kde-presets` (checksum verified) into `/usr/local`: Add to Steam,
+    Nested Desktop, the SteamOS Return to Gaming Mode icon, the Steam Keyboard
+    window rule and an empty KWallet (only when there is no wallet yet).
+  - Single user mode's launcher settings are re-applied after the layout reset.
+- `7802d90` **fix: LED driver for every kernel, kernel headers at boot, console power button, kernel overview**
+  - DKMS override (`/etc/dkms/leds-valve-dkms.conf`) so the LED driver builds
+    for every installed kernel (the LTS kernel failed) and on kernel updates.
+  - `ensure-kernel-headers.service` installs missing kernel headers at boot, so
+    a newly added kernel gets the LED driver too.
+  - Power button sleeps and no automatic suspend on mains power (Steam Machine).
+  - Menu shows every kernel with its headers, Steam controller driver and LED
+    driver, plus whether the LEDs are loaded.
+  - The selected menu row is highlighted in full.
+- **docs: Version 0.7.0 and CHANGELOG** (this release's docs)
+  - `VERSION` in the entry point, shown in the menu header and the bundle.
+  - README and AGENTS.md updated for the theme, the extras and the LED driver.
+
+## 0.6.2 - 2026-09-23
+
+- `a501df2` **Update steam-machine.sh**: install and enable `inputplumber`
+  next to `steamos-manager`.
+
+## 0.6.1 - 2026-09-23 (#5)
+
+- `c0bd16e` **fix: Use curl | bash in the docs**: `bash <(...)` doesn't work in fish.
+
+## 0.6.0 - 2026-09-23 (#4)
+
+- `d654d44` **fix: Single-file build for curl, published by GitHub Actions**:
+  `tools/bundle.sh` inlines `lib/*.sh`; CI publishes it to the `latest` release.
+
+## 0.5.0 - 2026-09-23 (#3)
+
+- `b91fa4b` **fix: Replace the question flow with a menu that turns components on and off**
+- `3d7f376` **fix: Interactive checkbox menu**: arrow keys to move, Space to select, Enter to run.
+
+## 0.4.0 - 2026-09-23 (#2)
+
+- `a0bc385` **fix: Add single user no password option with SDDM, fetch newest Vapor presets**
+
+## 0.3.0 - 2026-09-23 (#1)
+
+- `4ad6c2c` **fix: Fix setup bugs, add SteamOS desktop look and LED driver, split into modules**
+
+## 0.2.0 - 2026-09-07
+
+- `151a3bf` **add steam keyboard to desktop**
+- `1999b6e` **Automatically change theme**
+
+## 0.1.0 - 2026-09-06
+
+First version of the script.
+
+- `16a7739`, `97ee6f3`, `6be1051` **commit the script**
+- `e1aee45`, `25bc8c0` **change return to gaming mode logo to original logo**