🔥 refactor(region): drop input defaults from the cn profile

- 🔥 keep this change to the regional build architecture; Chinese input gets its own proposal instead of fixing one engine here
- ✅ assert the shipped profile adds only its repository keyring

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K3Jna1ogUUviYLJzhsG6Vr

default/regions/cn/packages

@@ -1,5 +1,2 @@
 # Installed from the ISO's offline repository before enabling ArchLinuxCN.
 archlinuxcn-keyring
-# Reuse the base Fcitx5 service and toolkit integration. libime supplies the
-# offline Pinyin dictionary/model through this package's dependencies.
-fcitx5-chinese-addons

default/regions/cn/skel/.config/fcitx5/config

@@ -1,14 +0,0 @@
-[Hotkey]
-EnumerateWithTriggerKeys=False
-# Keep lone Shift and Ctrl+Shift available to applications and CapsLock.
-AltTriggerKeys=
-EnumerateForwardKeys=
-EnumerateBackwardKeys=
-
-[Hotkey/TriggerKeys]
-# Ctrl+Space belongs to tmux/Herdr; CapsLock remains the Compose key.
-0=Alt+space
-
-[Behavior]
-# Start in direct input; Alt+Space activates offline Simplified Chinese Pinyin.
-ActiveByDefault=False

default/regions/cn/skel/.config/fcitx5/profile

@@ -1,12 +0,0 @@
-[Groups/0]
-Name=Default
-# Fcitx requires a nonempty group layout. Leave item layouts unset so it uses
-# the compositor's keymap; the base xcb.conf also disables XKB overrides.
-Default Layout=us
-DefaultIM=pinyin
-
-[Groups/0/Items/0]
-Name=keyboard-us
-
-[Groups/0/Items/1]
-Name=pinyin