build-cache: package groups in config + installer local fork (Phase 3)

- config/redbear-full.toml: 9 package groups defined (graphics-core,
  input-stack, dbus-services, firmware-stack, qt6-core, qt6-extras,
  kf6-frameworks, desktop-session, kde-desktop)
- Cargo.toml: switch redox_installer from upstream git to local fork
  (path = "local/sources/installer") to use package group support
- Cargo.lock: remove installer git source entry
- local/sources/installer: bump to package groups commit

Groups are resolved transparently by Config::from_file() — the cookbook
repo binary sees expanded packages automatically.

Cargo.lock

@@ -895,7 +895,6 @@ dependencies = [
 [[package]]
 name = "redox_installer"
 version = "0.2.42"
-source = "git+https://gitlab.redox-os.org/redox-os/installer.git#1c2534e44c68ace0a21db2a1bc9503945a38c809"
 dependencies = [
  "anyhow",
  "arg_parser",

Cargo.toml

@@ -40,7 +40,7 @@ pkgar = { git = "https://gitlab.redox-os.org/redox-os/pkgar.git" }
 pkgar-core = { git = "https://gitlab.redox-os.org/redox-os/pkgar.git" }
 pkgar-keys = { git = "https://gitlab.redox-os.org/redox-os/pkgar.git" }
 redox-pkg = { git = "https://gitlab.redox-os.org/redox-os/pkgutils.git", default-features = false }
-redox_installer = { git = "https://gitlab.redox-os.org/redox-os/installer.git", default-features = false }
+redox_installer = { path = "local/sources/installer", default-features = false }
 redoxer = { git = "https://gitlab.redox-os.org/redox-os/redoxer.git", default-features = false }
 regex = "1.11"
 serde = { version = "=1.0.197", features = ["derive"] }

config/redbear-full.toml

@@ -12,6 +12,66 @@ include = ["redbear-mini.toml"]
 [general]
 filesystem_size = 4096
 
+# Package groups — meta-package definitions for logical grouping of the
+# desktop stack. Reference a group in [packages] with `group-name = {}`
+# to include all its packages. Groups can reference other groups.
+# The installer resolves all group references before building/installing.
+
+[package_groups.graphics-core]
+description = "Core graphics stack (DRM, Mesa, Wayland compositor)"
+packages = ["redox-drm", "mesa", "libdrm", "libwayland", "wayland-protocols", "redbear-compositor"]
+
+[package_groups.input-stack]
+description = "Input device support (evdev, libinput, keymaps, IME, accessibility)"
+packages = ["libevdev", "libinput", "redbear-keymapd", "redbear-ime", "redbear-accessibility"]
+
+[package_groups.dbus-services]
+description = "D-Bus system bus and session broker"
+packages = ["expat", "dbus"]
+
+[package_groups.firmware-stack]
+description = "Firmware loading infrastructure"
+packages = ["redbear-firmware", "firmware-loader"]
+
+[package_groups.qt6-core]
+description = "Qt 6 core modules"
+packages = ["qtbase", "qtdeclarative", "qtsvg"]
+
+[package_groups.qt6-extras]
+description = "Qt 6 additional modules (Wayland, sensors)"
+packages = ["qtwayland", "qt6-wayland-smoke", "qt6-sensors"]
+
+[package_groups.kf6-frameworks]
+description = "KDE Frameworks 6 (all 38 frameworks)"
+packages = [
+    "kf6-attica", "kf6-karchive", "kf6-kauth", "kf6-kbookmarks",
+    "kf6-kcmutils", "kf6-kcodecs", "kf6-kcolorscheme", "kf6-kcompletion",
+    "kf6-kconfig", "kf6-kconfigwidgets", "kf6-kcoreaddons", "kf6-kcrash",
+    "kf6-kdbusaddons", "kf6-kdeclarative", "kf6-kded6", "kf6-kguiaddons",
+    "kf6-ki18n", "kf6-kiconthemes", "kf6-kidletime", "kf6-kitemmodels",
+    "kf6-kitemviews", "kf6-kjobwidgets", "kf6-knotifications", "kf6-kpackage",
+    "kf6-kservice", "kf6-ktextwidgets", "kf6-kwayland", "kf6-kwidgetsaddons",
+    "kf6-kxmlgui", "kf6-prison", "kf6-solid", "kf6-sonnet",
+    "kf6-knewstuff", "kf6-kwallet", "kf6-kglobalaccel", "kf6-pty",
+    "kf6-notifyconfig", "kf6-parts", "kf6-kio",
+]
+
+[package_groups.desktop-session]
+description = "Display manager, greeter, auth, and session bootstrap"
+packages = [
+    "kwin", "kdecoration", "sddm",
+    "redbear-authd", "redbear-session-launch", "seatd",
+    "redbear-greeter", "pam-redbear",
+]
+
+[package_groups.kde-desktop]
+description = "Complete KDE Plasma desktop stack (all groups combined)"
+packages = [
+    "graphics-core", "input-stack", "dbus-services", "firmware-stack",
+    "qt6-core", "qt6-extras", "kf6-frameworks", "desktop-session",
+    "icu", "konsole", "kglobalacceld", "amdgpu",
+]
+
 [users.messagebus]
 uid = 100
 gid = 100