fix(hub,web): query Codex models via machine RPC instead of session cwd (#1186)

SessionChat fetched Codex models through the session-scoped endpoint,
so the CLI listed models in the session process cwd, where a missing
directory or project-level Codex config could skew or break the result.
Use the machine-scoped endpoint (already used by NewSession) and drop
the now-unused session route and RPC plumbing.

Fixes #1072

web/src/api/client.ts

@@ -653,12 +653,6 @@ export class ApiClient {
         )
     }
 
-    async getSessionCodexModels(sessionId: string): Promise<CodexModelsResponse> {
-        return await this.request<CodexModelsResponse>(
-            `/api/sessions/${encodeURIComponent(sessionId)}/codex-models`
-        )
-    }
-
     async getSessionOpencodeModels(sessionId: string): Promise<OpencodeModelsResponse> {
         return await this.request<OpencodeModelsResponse>(
             `/api/sessions/${encodeURIComponent(sessionId)}/opencode-models`

web/src/components/SessionChat.tsx

@@ -544,7 +544,7 @@ function SessionChatInner(props: SessionChatProps) {
     const codexCollaborationModeSupported = agentFlavor === 'codex' && !controlledByUser
     const codexModelsState = useCodexModels({
         api: props.api,
-        sessionId: props.session.id,
+        machineId: props.session.metadata?.machineId ?? null,
         enabled: agentFlavor === 'codex' && props.session.active && !controlledByUser
     })
     const effectiveCodexServiceTier = agentFlavor === 'codex'

web/src/hooks/queries/useCodexModels.ts

@@ -5,7 +5,6 @@ import { queryKeys } from '@/lib/query-keys'
 
 export function useCodexModels(args: {
     api: ApiClient | null
-    sessionId?: string | null
     machineId?: string | null
     enabled?: boolean
 }): {
@@ -13,11 +12,9 @@ export function useCodexModels(args: {
     isLoading: boolean
     error: string | null
 } {
-    const { api, sessionId, machineId } = args
-    const enabled = Boolean(args.enabled && api && (sessionId || machineId))
-    const queryKey = sessionId
-        ? queryKeys.sessionCodexModels(sessionId)
-        : queryKeys.machineCodexModels(machineId ?? 'unknown')
+    const { api, machineId } = args
+    const enabled = Boolean(args.enabled && api && machineId)
+    const queryKey = queryKeys.machineCodexModels(machineId ?? 'unknown')
 
     const query = useQuery({
         queryKey,
@@ -25,9 +22,6 @@ export function useCodexModels(args: {
             if (!api) {
                 throw new Error('API unavailable')
             }
-            if (sessionId) {
-                return await api.getSessionCodexModels(sessionId)
-            }
             if (machineId) {
                 return await api.getMachineCodexModels(machineId)
             }

web/src/lib/query-keys.ts

@@ -15,7 +15,6 @@ export const queryKeys = {
         staged ? 'staged' : 'unstaged'
     ] as const,
     slashCommands: (sessionId: string) => ['slash-commands', sessionId] as const,
-    sessionCodexModels: (sessionId: string) => ['session-codex-models', sessionId] as const,
     sessionCursorModels: (sessionId: string) => ['session-cursor-models', sessionId] as const,
     sessionCursorChatStore: (sessionId: string) => ['session-cursor-chat-store', sessionId] as const,
     sessionPiModels: (sessionId: string) => ['session-pi-models', sessionId] as const,