WIP: Electron asset path and renderer build fixes

- Configure Vite renderer build for relative asset paths and explicit asset directory
- Remove baseURLForDataURL (caused Electron crash)
- Add debug logging for asset/network requests
- App now loads and assets are found, but some stylesheets may still be missing

Next: investigate CSS chunking/code splitting for Electron reliability.

vite.config.electron.renderer.mts

@@ -4,6 +4,7 @@ import path from 'path';
 
 export default defineConfig({
   plugins: [vue()],
+  base: './',
   resolve: {
     alias: {
       '@': path.resolve(__dirname, 'src'),
@@ -12,10 +13,13 @@ export default defineConfig({
   build: {
     outDir: 'dist-electron/www',
     emptyOutDir: false,
+    assetsDir: 'assets',
     rollupOptions: {
       input: path.resolve(__dirname, 'src/main.electron.ts'),
       output: {
-        entryFileNames: 'main.electron.js'
+        entryFileNames: 'main.electron.js',
+        assetFileNames: 'assets/[name]-[hash][extname]',
+        chunkFileNames: 'assets/[name]-[hash].js'
       }
     },
     commonjsOptions: {