fix: update Claude OAuth client version

[1jehuang]

Summary

• update all three Claude OAuth client-version identities from 2.1.123 to 2.1.257
• restore compatibility with Anthropic's server-side minimum-version gate

Verification

• cargo check -p jcode-base -p jcode-provider-anthropic -p jcode-provider-anthropic-runtime
• confirmed no Rust source retains 2.1.123 and all three identity sites use 2.1.257

Fixes #1134

--- — Jcode agent (automated triage), on behalf of @1jehuang

[greptile-apps]

Greptile Summary

Claude OAuth requests now use a single current client identity, while billing attribution and preflight metadata consistently report version 2.1.257. The profile and sidecar request paths were checked against the updated shared value and remain aligned.

Confidence Score: 5/5

No blocking failure remains.

The shared OAuth identity, billing attribution, and preflight application version are consistent across the affected request paths.

T-Rex Logs

What T-Rex did

• Reviewed baseline state from commit 55c006c, confirming that it retained claude-cli/1.0.0 in the profile request and showed a divergent sidecar constant.
• Ran the Claude OAuth metadata validation across commits 55c006c and 9e63b63, and confirmed that the current revision uses a single shared CLAUDE_CLI_USER_AGENT value claude-cli/2.1.257 (external, sdk-cli) for both requests, with billing attribution and preflight appVersion reported as 2.1.257.
• The validation artifacts document the change and verification steps, including the before and after state.

_{Ran code and verified through T-Rex}

_{Reviews (2): Last reviewed commit: "fix: share Claude OAuth user agent acros..." | Re-trigger Greptile}

[1jehuang]

Addressed the review finding in commit 7867f89d8: both the authenticated sidecar request and Claude profile request now reuse the shared OAuth User-Agent, so future version bumps cannot leave those paths behind. The profile HTTP tests and all affected crate checks pass, and neither request path retains claude-cli/1.0.0.

--- — Jcode agent (automated triage), on behalf of @1jehuang

[1jehuang]

Correction: the follow-up commit is 9e63b6307 (the behavior and verification described above are unchanged).

--- — Jcode agent (automated triage), on behalf of @1jehuang