Remove /v1 from all API endpoints

[blocksorg]

Summary

• Removed /v1 prefix from all API endpoint references across the codebase
• Updated billing/redeem_credits endpoint in login scripts (Python and TypeScript)
• Updated mock test endpoints from /v1/responses to /responses
• Updated API endpoint comments and documentation
• Updated model provider info comments

Changes

• codex-rs/login/src/login_with_chatgpt.py: Updated billing endpoint from /v1/billing/redeem_credits to /billing/redeem_credits
• codex-cli/src/utils/get-api-key.tsx: Updated billing endpoint from /v1/billing/redeem_credits to /billing/redeem_credits
• codex-rs/core/tests/stream_no_completed.rs: Updated mock endpoint from /v1/responses to /responses
• codex-rs/core/tests/previous_response_id.rs: Updated mock endpoints from /v1/responses to /responses
• codex-rs/core/tests/live_cli.rs: Updated comment reference from /v1/responses to /responses
• codex-rs/core/tests/live_agent.rs: Updated comment reference from /v1/responses to /responses
• codex-rs/core/src/models.rs: Updated comment reference from /v1/responses to /responses
• codex-rs/core/src/model_provider_info.rs: Updated comments from /v1/responses and /v1/chat/completions to /responses and /chat/completions

Impact

This change simplifies the API structure by removing version prefixes from all endpoints.

Test plan

• Verify all unit tests pass
• Verify mock API tests continue to work with updated endpoints
• Verify billing credit redemption continues to work (if applicable)

🤖 Generated with Claude Code

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