Add optional Claude Code installation with Z.AI API support

Features:
- New install-claude-code.sh script for automated Claude Code installation
- Z.AI API integration (GLM models: glm-4.5-air, glm-4.7)
- Automated and manual installation modes
- Supercharge.sh now offers to install Claude Code if not present
- Updated README with comprehensive Claude Code installation guide

Z.AI Models:
- glm-4.5-air: Fast, efficient model (Haiku class)
- glm-4.7: Powerful model (Sonnet/Opus class)

Documentation: https://docs.z.ai/devpack/tool/claude

supercharge.sh

@@ -13,10 +13,16 @@
 # - Custom hooks for session management
 # - MCP servers integration
 # - Plugin marketplace setup
+# - Optional Claude Code installation with Z.AI API support
 #
 # Usage: ./supercharge.sh [options]
 #   --skip-deps    Skip dependency installation
 #   --dev-mode     Development mode (verbose output)
+#
+# For Claude Code installation: ./install-claude-code.sh [options]
+#   --auto         Automatic installation with API key prompt (default)
+#   --manual       Show manual installation steps only
+#   --skip-install Skip Claude Code installation, just configure API
 ################################################################################
 
 set -e
@@ -97,12 +103,48 @@ check_claude_code() {
     log_step "Checking for Claude Code installation..."
 
     if ! command -v claude &> /dev/null; then
-        log_error "Claude Code CLI not found!"
-        echo "Please install Claude Code first: https://claude.com/claude-code"
-        exit 1
+        log_warn "Claude Code CLI not found!"
+        echo ""
+        echo -e "${YELLOW}Claude Code is required to use these customizations.${NC}"
+        echo ""
+        echo "Options:"
+        echo "  1. Install Claude Code with Z.AI API support (recommended)"
+        echo "  2. Install manually later"
+        echo "  3. Exit to install first"
+        echo ""
+        read -p "Choose option [1/2/3]: " -n 1 -r choice
+        echo ""
+
+        case $choice in
+            1)
+                log_info "Running Claude Code installer..."
+                bash "$SCRIPT_DIR/install-claude-code.sh" --auto
+                if ! command -v claude &> /dev/null; then
+                    log_error "Claude Code installation failed. Please install manually."
+                    exit 1
+                fi
+                log_success "Claude Code installed successfully"
+                ;;
+            2)
+                log_warn "Skipping Claude Code installation"
+                log_info "You can install it later with: ./install-claude-code.sh"
+                return 1
+                ;;
+            3)
+                log_info "Please install Claude Code first:"
+                echo "  npm install -g @anthropic-ai/claude-code"
+                echo "  Or run: ./install-claude-code.sh"
+                exit 1
+                ;;
+            *)
+                log_error "Invalid choice"
+                exit 1
+                ;;
+        esac
     fi
 
     log_success "Claude Code found: $(claude --version 2>/dev/null || echo 'installed')"
+    return 0
 }
 
 backup_existing_config() {
@@ -420,7 +462,15 @@ main() {
     done
 
     # Run installation steps
-    check_claude_code
+    if ! check_claude_code; then
+        log_info "Customizations installed. Install Claude Code to use them."
+        echo ""
+        echo -e "${CYAN}Install Claude Code:${NC}"
+        echo "  npm install -g @anthropic-ai/claude-code"
+        echo "  Or run: ./install-claude-code.sh"
+        echo ""
+        exit 0
+    fi
     backup_existing_config
     install_dependencies
     install_skills