feat(dees-tile): unify tile metadata into a consistent bottom info bar and add PDF file-size display

ts_web/elements/00group-media/dees-tile-pdf/demo.ts

@@ -1,4 +1,4 @@
-import { html } from '@design.estate/dees-element';
+import { html, cssManager } from '@design.estate/dees-element';
 
 export const demo = () => {
   const samplePdfs = [
@@ -29,7 +29,7 @@ export const demo = () => {
     <style>
       .demo-container {
         padding: 40px;
-        background: #f5f5f5;
+        background: ${cssManager.bdTheme('#f5f5f5', '#0a0a0a')};
       }
 
       .demo-section {
@@ -40,6 +40,7 @@ export const demo = () => {
         margin-bottom: 20px;
         font-size: 18px;
         font-weight: 600;
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
       }
 
       .preview-grid {
@@ -59,6 +60,7 @@ export const demo = () => {
         font-size: 14px;
         font-weight: 500;
         min-width: 100px;
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
       }
     </style>