chore: update model references to 'Cloaude Sonnet 4.5' across agent files

- Changed model name from 'claude-opus-4-5-20250514' to 'Cloaude Sonnet 4.5' in multiple agent markdown files.
- Ensures consistency in model naming across the project.

.github/agents/Playwright_Dev.agent.md

@@ -4,7 +4,7 @@ description: 'E2E Testing Specialist for Playwright test automation.'
 argument-hint: 'The feature or flow to test (e.g., "Write E2E tests for the login flow")'
 tools:
   ['vscode', 'execute', 'read', 'agent', 'playwright/*', 'edit/createDirectory', 'edit/createFile', 'edit/editFiles', 'edit/editNotebook', 'search', 'web', 'playwright/*', 'todo']
-model: 'claude-opus-4-5-20250514'
+model: 'Cloaude Sonnet 4.5'
 ---
 You are a PLAYWRIGHT E2E TESTING SPECIALIST with expertise in:
 - Playwright Test framework