feat(tests): add comprehensive tests for ProxyHosts and Uptime components

- Introduced isolated coverage tests for ProxyHosts with various scenarios including rendering, bulk apply, and link behavior.
- Enhanced existing ProxyHosts coverage tests to include additional assertions and error handling.
- Added tests for Uptime component to verify rendering and monitoring toggling functionality.
- Created utility functions for setting labels and help texts related to proxy host settings.
- Implemented bulk settings application logic with progress tracking and error handling.
- Added toast utility tests to ensure callback functionality and ID incrementing.
- Improved type safety in test files by using appropriate TypeScript types.

frontend/src/utils/__tests__/compareHosts.test.ts

@@ -46,7 +46,8 @@ const hostB: ProxyHost = {
 
 describe('compareHosts', () => {
   it('returns 0 for unknown sort column (default case)', () => {
-    const res = compareHosts(hostA, hostB, 'unknown' as any, 'asc')
+    const compareAny = compareHosts as unknown as (a: ProxyHost, b: ProxyHost, sortColumn: string, sortDirection: 'asc' | 'desc') => number
+    const res = compareAny(hostA, hostB, 'unknown', 'asc')
     expect(res).toBe(0)
   })