Localize update confirmation and first-run notifications

The update prompt speaks Chinese and points What's new at the
OmarchyCN releases page; the Wi-Fi, update, keybindings, dictation,
and default-agent first-run notices follow.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

install/user/first-run/wifi.sh

@@ -1,10 +1,10 @@
 notify_update() {
-  omarchy-notification-send -u critical -g  "Update System" "Click to update the system." \
+  omarchy-notification-send -u critical -g  "更新系统" "点击以更新系统。" \
     --exec omarchy-launch-floating-terminal-with-presentation omarchy-update
 }
 
 notify_wifi() {
-  omarchy-notification-send -u critical -g 󰖩 "Setup Wi-Fi" "Click to configure the wireless network." \
+  omarchy-notification-send -u critical -g 󰖩 "设置 Wi-Fi" "点击以配置无线网络。" \
     --exec omarchy-shell shell toggle omarchy.network
 }