Port the selected AI removal scaffold for 4.0.3

Port only Remove > AI and T3 removal/tests from #7504 (023021ad2d). Keep Dictation in its baseline location and omit unrelated removers.

(cherry picked from commit 73480ffabc091b812a0cfbe7bc845799c6078a88)

bin/omarchy-remove-ai-t3-code

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# omarchy:summary=Remove T3 Code along with its configuration and workspaces.
+# omarchy:requires-sudo=true
+
+set -e
+
+omarchy-pkg-drop t3code-bin
+
+# T3 Code drives agents that keep their own state -- ~/.claude.json, ~/.grok,
+# ~/.local/share/opencode -- and those outlive it, so only its own goes.
+rm -rf \
+  "$HOME/.config/t3code" \
+  "$HOME/.t3"
+rm -f "$HOME/.config/t3code-flags.conf"
+
+echo ""
+echo "T3 Code has been removed."

default/omarchy/omarchy-menu.jsonc

@@ -23,6 +23,8 @@
   "setup": {"icon":"","label":"Setup","aliases":["settings"]},
   "install": {"icon":"󰉉","label":"Install"},
   "remove": {"icon":"󰭌","label":"Remove","aliases":["uninstall"]},
+  "remove.ai": {"icon":"󱚤","label":"AI","title":"Remove"},
+  "remove.ai.t3-code": {"icon":"","iconFont":"omarchy","label":"T3 Code","when":"omarchy-pkg-present t3code-bin","action":"omarchy-launch-floating-terminal-with-presentation omarchy-remove-ai-t3-code"},
   "update": {"icon":"","label":"Update","aliases":["restart","refresh"]},
   "about": {"icon":"","label":"About","action":"omarchy-launch-about"},
   "system": {"icon":"","label":"System","aliases":["power-menu"]},

test/shell.d/remove-ai-test.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+tmp_dir="$(mktemp -d)"
+trap 'rm -rf "$tmp_dir"' EXIT
+
+mkdir -p "$tmp_dir/bin"
+
+cat >"$tmp_dir/bin/omarchy-pkg-drop" <<'SCRIPT'
+#!/bin/bash
+printf 'drop:%s\n' "$*" >>"$TEST_LOG"
+SCRIPT
+chmod +x "$tmp_dir/bin/omarchy-pkg-drop"
+
+export TEST_LOG="$tmp_dir/log"
+export PATH="$tmp_dir/bin:$PATH"
+
+fresh_home() {
+  rm -rf "$tmp_dir/home"
+  mkdir -p "$tmp_dir/home"
+  export HOME="$tmp_dir/home"
+}
+
+# T3 Code bootstraps the agents it drives; their state outlives it.
+fresh_home
+mkdir -p "$HOME/.config/t3code" "$HOME/.t3" "$HOME/.grok" "$HOME/.local/share/opencode" "$HOME/.npm"
+touch "$HOME/.claude.json"
+"$ROOT/bin/omarchy-remove-ai-t3-code" >/dev/null
+
+[[ ! -e $HOME/.t3 ]] || fail "T3 Code removal deletes its own data"
+pass "T3 Code removal deletes its own data"
+
+for kept in .grok .claude.json .npm .local/share/opencode; do
+  [[ -e $HOME/$kept ]] || fail "T3 Code removal keeps the agent state it bootstrapped" "$kept"
+done
+pass "T3 Code removal keeps the agent state it bootstrapped"
+