Stability fixes and cross-platform consistency

Pinned @anthropic-ai/claude-agent-sdk to bundled 0.2.29, reducing compatibility risks from dependency changes
Fixed session permission mode inconsistency after reload, ensuring stable and predictable permission behavior
Resolved Windows installer restart conflict and improved error handling for higher install success and recoverability
Improved schema assignment logic in model settings to reduce misconfiguration and errors during setup

Improved overall version stability, reducing anomalies caused by dependency and configuration boundary issues