feat(web): add copyright notice + footer/toolbar polish (#1639)

- Add a grey CopyrightBadge ("Copyright © Model Context Protocol a Series of LF
  Projects, LLC.") to the footer. Version (bottom-left) and copyright
  (bottom-right) share the bottom `xl` margin band: vertically centered in it
  and inset by `xl` to line up with the content's left/right margins.
- Move the list expand/collapse toggle to the right of the "Add Servers" button
  in ServerListControls.
- Make the monitoring column's close-sidebar control match the open-sidebar
  PinColumnButton theme (Button size sm / variant subtle) instead of a gray
  ActionIcon, so the open/close affordances read as a pair.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BrihGWcrM9JGRyu41nzZYw

clients/web/src/components/groups/MonitoringControls/MonitoringControls.tsx

@@ -1,4 +1,4 @@
-import { ActionIcon, Group, SegmentedControl, TextInput } from "@mantine/core";
+import { Button, Group, SegmentedControl, TextInput } from "@mantine/core";
 import { TbLayoutSidebarRightCollapse } from "react-icons/tb";
 import { ClearButton } from "../../elements/ClearButton/ClearButton";
 
@@ -69,15 +69,14 @@ export function MonitoringControls({
           ) : null
         }
       />
-      <ActionIcon
+      <Button
+        size="sm"
         variant="subtle"
-        color="gray"
-        size="lg"
         aria-label="Close monitoring column"
         onClick={onClose}
       >
         <TbLayoutSidebarRightCollapse size={20} />
-      </ActionIcon>
+      </Button>
     </ControlsBar>
   );
 }

clients/web/src/components/groups/ServerListControls/ServerListControls.test.tsx

@@ -39,8 +39,9 @@ describe("ServerListControls", () => {
         onToggleList={onToggleList}
       />,
     );
-    const buttons = screen.getAllByRole("button");
-    await user.click(buttons[0]);
+    await user.click(
+      screen.getByRole("button", { name: /Expand all|Collapse all/ }),
+    );
     expect(onToggleList).toHaveBeenCalledTimes(1);
   });
 

clients/web/src/components/groups/ServerListControls/ServerListControls.tsx

@@ -27,9 +27,6 @@ export function ServerListControls({
 }: ServerListControlsProps) {
   return (
     <Group justify="flex-end">
-      {serverCount > 0 && (
-        <ListToggle compact={compact} onToggle={onToggleList} />
-      )}
       <Button variant="default" onClick={onExport} disabled={serverCount === 0}>
         Export
       </Button>
@@ -40,6 +37,9 @@ export function ServerListControls({
           onImportServerJson={onImportServerJson}
         />
       )}
+      {serverCount > 0 && (
+        <ListToggle compact={compact} onToggle={onToggleList} />
+      )}
     </Group>
   );
 }