fix: fix broken images from CSP, remove dead code, upgrade React types

- Add ciphera.net and *.gstatic.com to CSP img-src (fixes app switcher
  icons and site favicons blocked by Content Security Policy)
- Delete 6 unused component/utility files and orphaned test
- Upgrade @types/react and @types/react-dom to v19 (matches React 19 runtime)
- Fix logger test to use vi.stubEnv for React 19 type compatibility

lib/utils/__tests__/logger.test.ts

@@ -7,23 +7,25 @@ describe('logger', () => {
 
   it('calls console.error in development', async () => {
     const spy = vi.spyOn(console, 'error').mockImplementation(() => {})
-    process.env.NODE_ENV = 'development'
+    vi.stubEnv('NODE_ENV', 'development')
 
     const { logger } = await import('../logger')
     logger.error('test error')
 
     expect(spy).toHaveBeenCalledWith('test error')
     spy.mockRestore()
+    vi.unstubAllEnvs()
   })
 
   it('calls console.warn in development', async () => {
     const spy = vi.spyOn(console, 'warn').mockImplementation(() => {})
-    process.env.NODE_ENV = 'development'
+    vi.stubEnv('NODE_ENV', 'development')
 
     const { logger } = await import('../logger')
     logger.warn('test warning')
 
     expect(spy).toHaveBeenCalledWith('test warning')
     spy.mockRestore()
+    vi.unstubAllEnvs()
   })
 })