Provider loading fix (#623)

* add mistral and gemini provider type for profile provider field

* load latest locally selected

* env variables take precedence over json save

* add gemini context windows and fix gemini defaulting for env

* load on startup fix

* fix failing tests

* clarify test message

* fix variable mismatches

* fix failing test

* delete keys and set profile.apiKey for mistral and gemini

* switch model as well when switching provider

* set model when adding a new model

src/components/ProviderManager.tsx

@@ -3,6 +3,7 @@ import * as React from 'react'
 import { DEFAULT_CODEX_BASE_URL } from '../services/api/providerConfig.js'
 import { Box, Text } from '../ink.js'
 import { useKeybinding } from '../keybindings/useKeybinding.js'
+import { useSetAppState } from '../state/AppState.js'
 import type { ProviderProfile } from '../utils/config.js'
 import {
   clearCodexCredentials,
@@ -581,6 +582,11 @@ export function ProviderManager({ mode, onDone }: Props): React.ReactNode {
           return
         }
 
+        setAppState(prev => ({
+          ...prev,
+          mainLoopModel: GITHUB_PROVIDER_DEFAULT_MODEL,
+          mainLoopModelForSession: null,
+        }))
         refreshProfiles()
         setAppState(prev => ({
           ...prev,
@@ -609,6 +615,11 @@ export function ProviderManager({ mode, onDone }: Props): React.ReactNode {
       }))
 
       providerLabel = active.name
+      setAppState(prev => ({
+        ...prev,
+        mainLoopModel: active.model,
+        mainLoopModelForSession: null,
+      }))
       const settingsOverrideError =
         clearStartupProviderOverrideFromUserSettings()
       const isActiveCodexOAuth = isCodexOAuthProfile(
@@ -801,6 +812,13 @@ export function ProviderManager({ mode, onDone }: Props): React.ReactNode {
     }
 
     const isActiveSavedProfile = getActiveProviderProfile()?.id === saved.id
+    if (isActiveSavedProfile) {
+      setAppState(prev => ({
+        ...prev,
+        mainLoopModel: saved.model,
+        mainLoopModelForSession: null,
+      }))
+    }
     const settingsOverrideError = isActiveSavedProfile
       ? clearStartupProviderOverrideFromUserSettings()
       : null