feat(claude): add effort setting parity with model across stack (#353)

Co-authored-by: Xiaoyi <xiaoyizhang@microsoft.com>

cli/src/claude/effort.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest'
+import { normalizeClaudeSessionEffort } from './effort'
+
+describe('normalizeClaudeSessionEffort', () => {
+    it('returns null when effort is missing', () => {
+        expect(normalizeClaudeSessionEffort()).toBeNull()
+    })
+
+    it('returns null for auto-like values', () => {
+        expect(normalizeClaudeSessionEffort('')).toBeNull()
+        expect(normalizeClaudeSessionEffort('auto')).toBeNull()
+        expect(normalizeClaudeSessionEffort('default')).toBeNull()
+        expect(normalizeClaudeSessionEffort('  AUTO  ')).toBeNull()
+    })
+
+    it('normalizes supported effort values', () => {
+        expect(normalizeClaudeSessionEffort('medium')).toBe('medium')
+        expect(normalizeClaudeSessionEffort('high')).toBe('high')
+        expect(normalizeClaudeSessionEffort('max')).toBe('max')
+        expect(normalizeClaudeSessionEffort('  High ')).toBe('high')
+    })
+})