fix: remove vite.config.ts and postcss.config.js conflicting with Nuxt

These are legacy configs from the Vue SPA. Nuxt manages Vite and
PostCSS internally — external configs cause IPC connection errors.

postcss.config.js

@@ -1,6 +0,0 @@
-export default {
-  plugins: {
-    '@tailwindcss/postcss': {},
-    autoprefixer: {},
-  },
-}

vite.config.ts

@@ -1,54 +0,0 @@
-import { fileURLToPath, URL } from 'node:url'
-
-import { defineConfig } from 'vite'
-import vue from '@vitejs/plugin-vue'
-import vueDevTools from 'vite-plugin-vue-devtools'
-
-// https://vite.dev/config/
-export default defineConfig({
-  plugins: [
-    vue(),
-    vueDevTools(),
-  ],
-  resolve: {
-    alias: {
-      '@': fileURLToPath(new URL('./src', import.meta.url))
-    },
-  },
-  build: {
-    // Optimize for SEO and performance
-    cssCodeSplit: true,
-    minify: 'terser',
-    terserOptions: {
-      compress: {
-        drop_console: true,
-        drop_debugger: true
-      }
-    },
-    rollupOptions: {
-      output: {
-        // Optimize chunk splitting for better caching
-        manualChunks: {
-          'vue-vendor': ['vue', 'vue-router'],
-          'ui-components': [
-            './src/components/ProjectCard.vue',
-            './src/components/TechBadge.vue',
-            './src/components/ContactMethod.vue'
-          ]
-        },
-        // Use content hash for better caching
-        chunkFileNames: 'assets/js/[name]-[hash].js',
-        entryFileNames: 'assets/js/[name]-[hash].js',
-        assetFileNames: 'assets/[ext]/[name]-[hash].[ext]'
-      }
-    },
-    // Enable source maps for better debugging
-    sourcemap: false,
-    // Increase chunk size warning limit
-    chunkSizeWarningLimit: 1000
-  },
-  // Optimize dependencies
-  optimizeDeps: {
-    include: ['vue', 'vue-router']
-  }
-})