feat: sync pane workspace overhaul from private repo

- ship the expanded left-nav and pane header workspace updates
- add dimension-driven browse flow, map view upgrades, and delete-node tooling
- expand eval coverage and refresh the public UI docs for the new layout

Generated with Codex

src/components/panes/TablePane.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { useState } from 'react';
 import PaneHeader from './PaneHeader';
 import DatabaseTableView from '../views/DatabaseTableView';
 import type { BasePaneProps } from './types';
@@ -19,6 +20,7 @@ export default function TablePane({
   onNodeClick,
   refreshToken
 }: TablePaneProps) {
+  const [toolbarHost, setToolbarHost] = useState<HTMLDivElement | null>(null);
   return (
     <div style={{
       display: 'flex',
@@ -27,11 +29,18 @@ export default function TablePane({
       background: 'transparent',
       overflow: 'hidden'
     }}>
-      <PaneHeader slot={slot} onCollapse={onCollapse} onSwapPanes={onSwapPanes} tabBar={tabBar} />
+      <PaneHeader
+        slot={slot}
+        onCollapse={onCollapse}
+        onSwapPanes={onSwapPanes}
+        tabBar={tabBar}
+        toolbarHostRef={setToolbarHost}
+      />
       <div style={{ flex: 1, overflow: 'hidden' }}>
         <DatabaseTableView
           onNodeClick={onNodeClick}
           refreshToken={refreshToken}
+          toolbarHost={toolbarHost}
         />
       </div>
     </div>