style(fe): enforce global design tokens for grid density, font scale and component heights in tokens.css and base.css

frontend/src/design-system/tokens.css

@@ -181,17 +181,18 @@
 }
 
 /* AG Grid Global Theme & Density Standardization Rule (AG Grid 통일 규격) */
-.ag-theme-quartz, .ag-theme-alpine {
+.ag-theme-quartz, .ag-theme-alpine, [class*="ag-theme-"], .ag-root-wrapper {
   --ag-grid-size: 3px !important;
   --ag-list-item-height: 28px !important;
   --ag-header-height: 30px !important;
   --ag-row-height: 28px !important;
   --ag-font-size: var(--ks-font-grid) !important;
-  --ag-font-family: var(--ks-font-family-base) !important;
+  --ag-font-family: Inter, Pretendard, system-ui, -apple-system, sans-serif !important;
   --ag-border-color: var(--ks-color-border) !important;
   --ag-header-background-color: var(--ks-color-canvas) !important;
   --ag-row-hover-color: var(--ks-color-neutral-100) !important;
   --ag-selected-row-background-color: rgba(59, 130, 246, 0.1) !important;
+  font-size: var(--ks-font-grid) !important;
 }
 
 /* Raw Table Standard Grid Class for legacy fallback tables */