fix: unify compact navigation breakpoint

frontend/app.html

@@ -4941,7 +4941,7 @@
       color: var(--text-secondary);
     }
 
-    @media (min-width: 769px) {
+    @media (min-width: 901px) {
       .mobile-file-sheet-overlay {
         display: none !important;
       }

frontend/app.js

@@ -22,7 +22,7 @@ createApp({
         console.warn('[视图] 无法读取文件视图偏好:', error);
       }
 
-      return window.matchMedia('(max-width: 768px)').matches ? 'list' : 'grid';
+      return window.matchMedia('(max-width: 900px)').matches ? 'list' : 'grid';
     })();
 
     return {
@@ -2251,7 +2251,7 @@ handleDragLeave(e) {
     },
 
     isMobileViewport() {
-      return window.matchMedia('(max-width: 768px)').matches;
+      return window.matchMedia('(max-width: 900px)').matches;
     },
 
     setMobileSheetScrollLock(locked) {

frontend/workspace.css

@@ -2709,7 +2709,7 @@ body.enterprise-netdisk .mobile-file-create-trigger {
   }
 }
 
-@media (max-width: 768px) {
+@media (max-width: 900px) {
   body.enterprise-netdisk {
     min-width: 0;
     min-height: 100vh;
@@ -3159,12 +3159,16 @@ body.enterprise-netdisk .mobile-file-create-trigger {
   body.enterprise-netdisk .file-list-action-col {
     width: 48px;
     padding-left: 4px !important;
+    display: table-cell !important;
   }
 
   body.enterprise-netdisk .file-row-mobile-more {
     width: 42px;
     min-width: 42px;
     min-height: 42px;
+    display: inline-flex !important;
+    align-items: center;
+    justify-content: center;
     border-radius: 11px;
   }