fix(objectstack): clean SDK client logger (no ANSI in RN/web)

[os-zhuang]

What

Found during a full browser flow-test of the AI assistant: a red dev error toast showing raw ANSI escape codes — [31m…ERROR[0m HTTP request failed.

The @objectstack/client SDK's default logger formats messages with terminal ANSI colour codes + timestamps. In React Native / web those escapes leak as literal [31m… text into the console and trip the dev error overlay (here, off a benign notifications 404 the example server doesn't implement).

Fix

Pass a clean logger (the SDK's ClientConfig.logger hook) to every ObjectStackClient:

• plain console output, no ANSI;
• debug/info silenced outside __DEV__;
• SDK error → console.warn (a benign HTTP failure no longer pops the red error overlay), fatal → console.error.

Verified

• In the browser against a live server: the ANSI error toast is gone (Dashboard + AI screen clean).
• npm run lint 0 errors; jest 1266/1266.

Found while testing the complete AI flow (login → connect → chat → tool call → markdown answer → conversation saved + auto-titled) end-to-end against a framework server — everything else worked well; this was the one real issue.

🤖 Generated with Claude Code