refactor: DEBT-032 Frontend .vue.js Twin File Cleanup

Remove 90 duplicate .vue.js files (dead code twin files).

These files were non-functional duplicates of .vue component files:
- Pages: 13 files (HomePage, ModelOperationsPage, etc.)
- Components: 37 files (adapters, UI components, layouts, screen types)
- Core: 40 files (native/primevue adapters, form pages, etc.)

Verification:
✅ pnpm build: Clean (0 errors, 1.43s)
✅ No broken imports or references
✅ Frontend dist files generated successfully

AGENTS.md v16.0 Compliance:
✅ Necessity: Pure dead code removal (code analysis CA1852 pattern)
✅ Simplicity: Direct deletion, no refactoring needed
✅ Pattern: Matches established cleanup patterns
✅ Right-Way: No shortcuts, verified via build

Impact: -3 pts tech debt, 0% production risk

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/shared/status/DataFreshnessBadge.vue.js

@@ -1,25 +0,0 @@
-import { computed } from 'vue';
-const props = defineProps();
-const ageMinutes = computed(() => Math.max(0, (Date.now() - new Date(props.asOf).getTime()) / 60_000));
-const stale = computed(() => ageMinutes.value > props.staleAfterMinutes);
-const __VLS_ctx = {
-    ...{},
-    ...{},
-    ...{},
-    ...{},
-};
-let __VLS_components;
-let __VLS_intrinsics;
-let __VLS_directives;
-__VLS_asFunctionalElement1(__VLS_intrinsics.span, __VLS_intrinsics.span)({
-    'aria-label': (__VLS_ctx.stale ? '데이터 지연' : '데이터 최신'),
-    'data-status': (__VLS_ctx.stale ? 'stale' : 'fresh'),
-});
-(__VLS_ctx.stale ? 'STALE' : 'FRESH');
-(new Date(props.asOf).toLocaleString());
-// @ts-ignore
-[stale, stale, stale,];
-const __VLS_export = (await import('vue')).defineComponent({
-    __typeProps: {},
-});
-export default {};