fix(fe): remove duplicate shell breadcrumb and align grid width to parent container

frontend/src/shared/shell/KsAppShell.vue

@@ -72,10 +72,6 @@ onMounted(() => {
         tabindex="-1"
         :class="['ks-app-shell__main', { 'ks-app-shell__main--collapsed': layoutStore.sidebarCollapsed }]"
       >
-        <nav class="ks-breadcrumb" aria-label="현재 위치">
-          <span>K-ArtSell</span> &gt; <span>{{ route.meta.title || route.path }}</span>
-          <span class="ks-env-badge">RESEARCH_CANDIDATE_NOT_PRODUCTION</span>
-        </nav>
         <slot />
       </main>
     </div>

frontend/src/shared/ui/components/KsDataGrid.vue

@@ -24,7 +24,7 @@ function onRowClicked(event: RowClickedEvent): void {
 }
 </script>
 <template>
-  <div class="ks-grid" :style="{ height: props.height }" :aria-busy="props.loading">
+  <div class="ks-grid" :aria-busy="props.loading">
     <AgGridVue
       style="height: 100%; width: 100%"
       :theme="themeQuartz"
@@ -39,5 +39,5 @@ function onRowClicked(event: RowClickedEvent): void {
 </template>
 
 <style scoped>
-.ks-grid { flex: 1; min-height: 0; border: 1px solid var(--ks-color-neutral-200); border-radius: var(--ks-radius-md); overflow: hidden; background: #fff; }
+.ks-grid { flex: 1; height: 100%; width: 100%; min-height: 0; border: 1px solid var(--ks-color-neutral-200); border-radius: var(--ks-radius-md); overflow: hidden; background: #fff; }
 </style>