fix: prevent frontend typecheck source emit (AEG-X-002)

evidence/AEG-X-002/frontend-build-noemit_20260808.log

@@ -0,0 +1,19 @@
+
+> kartsell-frontend@0.1.0 build D:\JobRoomz\KArtSell.Aegis\frontend
+> vue-tsc --noEmit && vite build
+
+vite v8.2.0 building client environment for production...
+
+transforming...✓ 538 modules transformed.
+rendering chunks...
+computing gzip size...
+dist/index.html                     0.39 kB │ gzip:   0.26 kB
+dist/assets/index-Btzeda_z.css     28.11 kB │ gzip:   5.46 kB
+dist/assets/index-ViDeaTMv.js   1,837.78 kB │ gzip: 501.14 kB
+
+✓ built in 1.54s
+[plugin builtin:vite-reporter] 
+(!) Some chunks are larger than 500 kB after minification. Consider:
+- Using dynamic import() to code-split the application
+- Use build.rolldownOptions.output.codeSplitting to improve chunking: https://rolldown.rs/reference/OutputOptions.codeSplitting
+- Adjust chunk size limit for this warning via build.chunkSizeWarningLimit.