Make ViewHeader and ServerStatusIndicator responsive

Header now adapts cleanly across widths instead of wrapping or clipping:

- LeftSection/RightSection are symmetric (`flex: 1, miw: 0, wrap: nowrap`),
  so the natural-width CenterSection sits visually centered between them.
  Server name truncates with ellipsis when the left slice is too narrow.
- Below `md` (992px) the SegmentedControl swaps for a Select dropdown so
  the tab labels never have to shrink or wrap.
- Below `sm` (768px) the "Disconnect" button collapses to an MdLinkOff
  ActionIcon (with `aria-label` + `title` for the tooltip).
- Below `lg` (1200px) ServerStatusIndicator hides its text label and shows
  only the colored dot (full label still available as a tooltip on hover),
  freeing space so the Disconnect button stops getting truncated at typical
  desktop widths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/web/src/components/elements/ServerStatusIndicator/ServerStatusIndicator.tsx

@@ -1,4 +1,5 @@
 import { Group, Paper, Text } from "@mantine/core";
+import { useMediaQuery } from "@mantine/hooks";
 import type { ConnectionStatus } from "@inspector/core/mcp/types.js";
 
 export interface ServerStatusIndicatorProps {
@@ -42,13 +43,16 @@ export function ServerStatusIndicator({
   latencyMs,
   retryCount,
 }: ServerStatusIndicatorProps) {
+  const showLabel = useMediaQuery("(min-width: 1200px)");
+  const label = getLabel(status, latencyMs, retryCount);
   return (
     <Group gap="xs">
       <Dot
         bg={statusColorVar[status]}
         className={status === "connecting" ? "inspector-pulse" : undefined}
+        title={showLabel ? undefined : label}
       />
-      <Text size="sm">{getLabel(status, latencyMs, retryCount)}</Text>
+      {showLabel && <Text size="sm">{label}</Text>}
     </Group>
   );
 }

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

@@ -5,12 +5,14 @@ import {
   Group,
   Image,
   SegmentedControl,
+  Select,
   Text,
   Title,
   useComputedColorScheme,
 } from "@mantine/core";
+import { useMediaQuery } from "@mantine/hooks";
 import type { Implementation } from "@modelcontextprotocol/sdk/types.js";
-import { MdLightMode, MdDarkMode } from "react-icons/md";
+import { MdLightMode, MdDarkMode, MdLinkOff } from "react-icons/md";
 import type { ConnectionStatus } from "@inspector/core/mcp/types.js";
 import { ServerStatusIndicator } from "../../elements/ServerStatusIndicator/ServerStatusIndicator";
 import mcpLogo from "../../../theme/assets/MCP.svg";
@@ -39,13 +41,13 @@ const HeaderBar = Group.withProps({
   h: "100%",
   px: "md",
   wrap: "nowrap",
-  gap: 0,
+  gap: "md",
 });
 
 const LeftSection = Group.withProps({
   gap: "md",
   wrap: "nowrap",
-  w: "33.33%",
+  flex: 1,
   miw: 0,
 });
 
@@ -66,17 +68,20 @@ const ServerName = Text.withProps({
   fw: 600,
   size: "lg",
   truncate: "end",
-  maw: "calc(100% - 40px)",
+  miw: 0,
+  flex: 1,
 });
 
 const CenterSection = Group.withProps({
-  w: "33.33%",
-  justify: "center",
+  wrap: "nowrap",
+  flex: "0 0 auto",
 });
 
 const RightSection = Group.withProps({
   gap: "sm",
-  w: "33.33%",
+  wrap: "nowrap",
+  flex: 1,
+  miw: 0,
   justify: "flex-end",
 });
 
@@ -86,6 +91,13 @@ const DisconnectButton = Button.withProps({
   size: "sm",
 });
 
+const DisconnectIcon = ActionIcon.withProps({
+  variant: "subtle",
+  c: "red",
+  size: 36,
+  "aria-label": "Disconnect",
+});
+
 const ThemeToggle = ActionIcon.withProps({
   variant: "subtle",
   size: 36,
@@ -101,6 +113,8 @@ const UnconnectedBar = Group.withProps({
 export function ViewHeader(props: ViewHeaderProps) {
   const colorScheme = useComputedColorScheme();
   const ThemeIcon = colorScheme === "dark" ? MdLightMode : MdDarkMode;
+  const showSegmented = useMediaQuery("(min-width: 992px)");
+  const showDisconnectLabel = useMediaQuery("(min-width: 768px)");
 
   if (!props.connected) {
     return (
@@ -126,12 +140,23 @@ export function ViewHeader(props: ViewHeaderProps) {
       </LeftSection>
 
       <CenterSection>
-        <SegmentedControl
-          value={props.activeTab}
-          onChange={props.onTabChange}
-          data={props.availableTabs}
-          size="sm"
-        />
+        {showSegmented ? (
+          <SegmentedControl
+            value={props.activeTab}
+            onChange={props.onTabChange}
+            data={props.availableTabs}
+            size="sm"
+          />
+        ) : (
+          <Select
+            value={props.activeTab}
+            onChange={(value) => value && props.onTabChange(value)}
+            data={props.availableTabs}
+            size="sm"
+            allowDeselect={false}
+            w={140}
+          />
+        )}
       </CenterSection>
 
       <RightSection>
@@ -139,9 +164,15 @@ export function ViewHeader(props: ViewHeaderProps) {
           status={props.status}
           latencyMs={props.latencyMs}
         />
-        <DisconnectButton onClick={props.onDisconnect}>
-          Disconnect
-        </DisconnectButton>
+        {showDisconnectLabel ? (
+          <DisconnectButton onClick={props.onDisconnect}>
+            Disconnect
+          </DisconnectButton>
+        ) : (
+          <DisconnectIcon onClick={props.onDisconnect} title="Disconnect">
+            <MdLinkOff size={20} />
+          </DisconnectIcon>
+        )}
         <ThemeToggle onClick={props.onToggleTheme}>
           <ThemeIcon size={20} />
         </ThemeToggle>