feat: click-drag drawing, layer tree, settings modal, UI improvements

- interaction: click-drag drawing for 2-point tools (line, rect, circle, dimension, leader)
- interaction: preview rendering during drag with setPreviewElement
- interaction: handleDrawDown only sets phase=drawing on first point
- CanvasArea: sync activeLayerId to LayerManager
- CanvasArea: callback refresh useEffect prevents stale closures
- App.tsx: functional setElements updates for handleElementCreated/Deleted/Modified
- LayerPanel: tree structure with sub-layers (onReorder, onAddSubLayer)
- TreeView: drag-and-drop reordering support
- RightSidebar: onReorder, onAddSubLayer, onUpdateElement props
- PropertiesPanel: onUpdateElement prop
- SettingsModal: personal/password/language/theme/users/plugins/AI tabs
- styles.css: extensive UI styling additions
- types: updated RightSidebarProps, CanvasAreaProps, LayerPanelProps

deploy.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+cd /data/web-cad-neu
+echo "[$(date)] Pulling latest code..."
+git pull origin main
+echo "[$(date)] Building backend image..."
+docker build -t web-cad-neu-backend:latest ./backend
+echo "[$(date)] Building frontend image..."
+docker build -t web-cad-neu-frontend:latest ./frontend
+echo "[$(date)] Redeploying containers..."
+cd /data/coolify/services/cnuavrh33goa3zs0upi6hgif
+docker compose up -d --force-recreate
+echo "[$(date)] Health check..."
+sleep 5
+docker exec backend-cnuavrh33goa3zs0upi6hgif wget -qO- http://localhost:3001/api/health
+echo
+echo "[$(date)] Frontend check..."
+curl -sk -o /dev/null -w "%{http_code}" https://web-cad-neu.server.media-on.de
+echo
+echo "[$(date)] Deploy complete!"