chore: remove dead code and tune frontend chunks

Remove unused production symbols, starter assets, and stale browser tooling; reduce frontend chunk fragmentation.

apps/server/src/entities/jinshuju-match-rule.entity.ts

@@ -16,11 +16,6 @@ export interface JinshujuFieldMapping {
   studentNo?: string;
 }
 
-export const DEFAULT_MAPPING: JinshujuFieldMapping = {
-  name: 'field_1',
-  phone: 'field_2',
-};
-
 const mappingTransformer = {
   to(value: JinshujuFieldMapping): string {
     return JSON.stringify(value);