refactor: split mcp-servers-section into modular components

Refactored 1348-line monolithic file into proper folder structure
following folder-pattern.md conventions:

Structure:
- components/ - UI components (card, header, settings, warning)
- dialogs/ - 5 dialog components (add/edit, delete, import, json edit)
- hooks/use-mcp-servers.ts - all state management & handlers
- types.ts, constants.ts, utils.tsx - shared code

Main file reduced from 1348 to 192 lines (composition only).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/components/views/settings-view/mcp-servers/utils.tsx

@@ -0,0 +1,51 @@
+import { Terminal, Globe, Loader2, CheckCircle2, XCircle } from 'lucide-react';
+import type { ServerType, ServerTestState } from './types';
+import { SENSITIVE_PARAM_PATTERNS } from './constants';
+
+/**
+ * Mask sensitive values in URLs (query params with key-like names)
+ */
+export function maskSensitiveUrl(url: string): string {
+  try {
+    const urlObj = new URL(url);
+    const params = new URLSearchParams(urlObj.search);
+    let hasSensitive = false;
+
+    for (const [key] of params.entries()) {
+      if (SENSITIVE_PARAM_PATTERNS.some((pattern) => pattern.test(key))) {
+        params.set(key, '***');
+        hasSensitive = true;
+      }
+    }
+
+    if (hasSensitive) {
+      urlObj.search = params.toString();
+      return urlObj.toString();
+    }
+    return url;
+  } catch {
+    // If URL parsing fails, try simple regex replacement for common patterns
+    return url.replace(
+      /([?&])(api[-_]?key|auth|token|secret|password|credential)=([^&]*)/gi,
+      '$1$2=***'
+    );
+  }
+}
+
+export function getServerIcon(type: ServerType = 'stdio') {
+  if (type === 'stdio') return Terminal;
+  return Globe;
+}
+
+export function getTestStatusIcon(status: ServerTestState['status']) {
+  switch (status) {
+    case 'testing':
+      return <Loader2 className="w-4 h-4 animate-spin text-brand-500" />;
+    case 'success':
+      return <CheckCircle2 className="w-4 h-4 text-green-500" />;
+    case 'error':
+      return <XCircle className="w-4 h-4 text-destructive" />;
+    default:
+      return null;
+  }
+}