refactor(editor): improve type safety and optimize build chunks

Refactor the Editor component to replace `any` types with explicit interfaces for Excalidraw props, library items, and elements, improving type safety and developer experience.

Additionally, update the Vite configuration to implement manual chunking for large dependencies like Excalidraw, React, and Zustand to optimize bundle loading and improve build performance.

frontend/vite.config.ts

@@ -27,5 +27,17 @@ export default defineConfig({
   build: {
     outDir: 'dist',
     sourcemap: true,
+    rollupOptions: {
+      output: {
+        manualChunks: {
+          'excalidraw': ['@excalidraw/excalidraw'],
+          'react-vendor': ['react', 'react-dom', 'react-router-dom'],
+          'ui-vendor': ['lucide-react', 'clsx'],
+          'i18n': ['i18next', 'react-i18next', 'i18next-browser-languagedetector'],
+          'state': ['zustand'],
+        },
+      },
+    },
+    chunkSizeWarningLimit: 1000,
   },
 })