Address PR #1221 code review feedback

- Fix getCapabilityEntries to iterate fixed key sets so unsupported
  capabilities render red X (was only showing present/supported ones)
- Merge duplicate @mantine/core import in ViewHeader
- Move ConnectionState from ServerCard to core/mcp/types.ts
- Narrow onConnectionModeChange to "proxy" | "direct" instead of string

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/groups/ServerCard/ServerCard.stories.tsx

@@ -1,7 +1,9 @@
-import type { MCPServerConfig } from "@inspector/core/mcp/types.js";
+import type {
+  ConnectionState,
+  MCPServerConfig,
+} from "@inspector/core/mcp/types.js";
 import type { Meta, StoryObj } from "@storybook/react-vite";
 import { fn } from "storybook/test";
-import type { ConnectionState } from "./ServerCard";
 import { ServerCard } from "./ServerCard";
 
 const stdioConfig: MCPServerConfig = {

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

@@ -1,7 +1,7 @@
 import { Badge, Button, Card, Group, Menu, Stack, Text } from "@mantine/core";
 import type { Implementation } from "@modelcontextprotocol/sdk/types.js";
 import type {
-  ConnectionStatus,
+  ConnectionState,
   MCPServerConfig,
   ServerType,
 } from "@inspector/core/mcp/types.js";
@@ -11,12 +11,6 @@ import { ConnectionToggle } from "../../elements/ConnectionToggle/ConnectionTogg
 import { ContentViewer } from "../../elements/ContentViewer/ContentViewer";
 import { InlineError } from "../../elements/InlineError/InlineError";
 
-export interface ConnectionState {
-  status: ConnectionStatus;
-  retryCount?: number;
-  error?: { message: string; details?: string };
-}
-
 export interface ServerCardProps {
   name: string;
   config: MCPServerConfig;