Add backend launcher scripts and refresh cleanup utility

Introduce claude-glm and claude-tk wrappers with secure keychain token lookup and backend model defaults, and replace cleanup.sh with the updated cleanup script entrypoint.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

claude-tk

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+# claude-gpt — Run Claude Code with GPT backend
+#
+# Usage:
+#   claude-gpt [args...]
+#
+# Setup API key (reuse existing):
+#   macOS:
+#     security add-generic-password -a "$USER" -s TK_AI_API_TOKEN -w "YOUR_KEY"
+#   Linux:
+#     echo "YOUR_KEY" | secret-tool store --label "AI API Token" service TK_AI_API_TOKEN
+
+KEY_NAME="TK_AI_API_TOKEN"
+
+get_token() {
+  if command -v security >/dev/null 2>&1; then
+    security find-generic-password -s "$KEY_NAME" -w 2>/dev/null && return
+  fi
+  if command -v secret-tool >/dev/null 2>&1; then
+    secret-tool lookup service "$KEY_NAME" 2>/dev/null && return
+  fi
+  return 1
+}
+
+TOKEN=$(get_token)
+
+if [ -z "$TOKEN" ]; then
+  echo "❌ Missing GPT token ($KEY_NAME)"
+  exit 1
+fi
+
+export ANTHROPIC_BASE_URL="https://ai.acbpro.com"
+export ANTHROPIC_AUTH_TOKEN="$TOKEN"
+export ANTHROPIC_DEFAULT_OPUS_MODEL="gpt-5.3-codex(high)"
+export ANTHROPIC_DEFAULT_SONNET_MODEL="gpt-5.3-codex(medium)"
+export ANTHROPIC_DEFAULT_HAIKU_MODEL="gpt-5.3-codex(medium)"
+
+echo "→ Backend: GPT"
+
+exec claude "$@"