fix: invoke print hooks before console output check

[KJyang-0114]

Summary

This fixes issue #1149 where set_console_output_enabled(False) also disabled AgentScope Studio forwarding.

Root Cause

The print() method in AgentBase checked _disable_console_output and returned early before any hooks were invoked. This meant the Studio pre_print hook never ran when console output was disabled.

Fix

Invoke pre_print and post_print hooks before the console output check. This decouples Studio/tracing from console output:

• set_console_output_enabled(False) now only disables console printing
• Studio continues to receive messages, metadata, and traces

Changes

• src/agentscope/agent/_agent_base.py:
  • Added invocation of pre_print hooks before the early return
  • Added invocation of post_print hooks after console output (but before cleanup)

Testing

• Syntax validation passed
• Manual test: Enable Studio, disable console output, verify messages still appear in Studio

Risk

• Low: Only adds hook invocations, no behavior changes to existing console output logic

Rollback

Simply revert this commit to restore previous behavior.

[cla-assistant]

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