Fix context menu positioning and remove unnecessary width

webui/html/base.css

@@ -907,7 +907,11 @@ button:disabled {
 
 .context-menu {
   position: fixed;
-  min-width: 220px;
+  display: inline-flex;
+  flex-direction: column;
+  align-items: stretch;
+  width: max-content;
+  max-width: min(196px, calc(100vw - 24px));
   padding: 8px;
   border: 1px solid var(--color-border);
   border-radius: var(--radius-sm);
@@ -924,24 +928,16 @@ button:disabled {
   color: var(--color-text-muted);
 }
 
-.context-menu-target {
-  margin-top: 4px;
-  font-size: 12px;
-  color: var(--color-text-primary);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-}
-
 .context-menu-separator {
   height: 1px;
-  margin: 8px 0;
+  margin: 6px 0 8px;
   background: var(--color-border);
 }
 
 .context-menu button {
-  width: 100%;
+  width: auto;
   justify-content: flex-start;
+  white-space: nowrap;
 }
 
 #upload-modal .popup-card {