feat: Refactor model handling & reasoning effort across navigation, typeahead, OpenAI/Codex providers, API shim, configs, and UI (adds EffortPicker, new mappings/options, unique suggestion IDs, effort utilities; removes deprecated aliases; defaults Codex to gpt-5.4; improves selection logic and status display)

src/utils/model/providers.ts

@@ -9,6 +9,7 @@ export type APIProvider =
   | 'openai'
   | 'gemini'
   | 'github'
+  | 'codex'
 
 export function getAPIProvider(): APIProvider {
   return isEnvTruthy(process.env.CLAUDE_CODE_USE_GEMINI)
@@ -16,7 +17,9 @@ export function getAPIProvider(): APIProvider {
     : isEnvTruthy(process.env.CLAUDE_CODE_USE_GITHUB)
       ? 'github'
       : isEnvTruthy(process.env.CLAUDE_CODE_USE_OPENAI)
-        ? 'openai'
+        ? isCodexModel()
+          ? 'codex'
+          : 'openai'
         : isEnvTruthy(process.env.CLAUDE_CODE_USE_BEDROCK)
           ? 'bedrock'
           : isEnvTruthy(process.env.CLAUDE_CODE_USE_VERTEX)
@@ -29,6 +32,19 @@ export function getAPIProvider(): APIProvider {
 export function usesAnthropicAccountFlow(): boolean {
   return getAPIProvider() === 'firstParty'
 }
+function isCodexModel(): boolean {
+  const model = (process.env.OPENAI_MODEL || '').toLowerCase()
+  return (
+    model === 'codexplan' ||
+    model === 'codexspark' ||
+    model === 'gpt-5.4' ||
+    model === 'gpt-5.3-codex' ||
+    model === 'gpt-5.3-codex-spark' ||
+    model === 'gpt-5.2-codex' ||
+    model === 'gpt-5.1-codex-max' ||
+    model === 'gpt-5.1-codex-mini'
+  )
+}
 
 export function getAPIProviderForStatsig(): AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS {
   return getAPIProvider() as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS