fix: update DEFAULT_MISTRAL_MODEL and add drift guard test

The /provider interactive setup still defaulted to devstral-latest via
DEFAULT_MISTRAL_MODEL, even though the gateway descriptor points at
mistral-vibe-cli-latest. Update the constant and add a test that
asserts DEFAULT_MISTRAL_MODEL matches the gateway defaultModel to
prevent future drift.

Co-Authored-By: OpenClaude (mimo-v2.5-pro) <openclaude@gitlawb.com>

Author: currentsuspect

src/utils/providerProfile.ts

@@ -44,7 +44,7 @@ export const DEFAULT_GEMINI_BASE_URL =
   'https://generativelanguage.googleapis.com/v1beta/openai'
 export const DEFAULT_GEMINI_MODEL = 'gemini-3-flash-preview'
 export const DEFAULT_MISTRAL_BASE_URL = 'https://api.mistral.ai/v1'
-export const DEFAULT_MISTRAL_MODEL = 'devstral-latest'
+export const DEFAULT_MISTRAL_MODEL = 'mistral-vibe-cli-latest'
 
 const PROFILE_ENV_KEYS = [
   'CLAUDE_CODE_USE_OPENAI',

src/utils/providerProfiles.test.ts

@@ -2041,3 +2041,9 @@ describe('setActiveProviderProfile model cache', () => {
     ])
   })
 })
+
+test('DEFAULT_MISTRAL_MODEL matches the mistral gateway defaultModel', async () => {
+  const { DEFAULT_MISTRAL_MODEL } = await import('./providerProfile.js')
+  const { default: mistralGateway } = await import('../integrations/gateways/mistral.js')
+  expect(DEFAULT_MISTRAL_MODEL).toBe(mistralGateway.defaultModel)
+})