Improve error messaging when agent exits unexpectedly #116
Description
Description
When the underlying agent exits unexpectedly (e.g., due to no API credits remaining), Gigacode should provide a clear error message indicating that the session has finished and why. Currently, the exit reason is not communicated well to the user.
Examples
- Agent exits due to no credits: should display something like "Session finished: agent exited due to insufficient API credits"
- Agent crashes or exits with an error code: should display the reason and explicitly state the session is over
Expected Behavior
When the agent process exits, Gigacode should:
- Clearly state that the session has finished
- Include the reason for the exit when available
- Distinguish between normal completion and error exits
Actual Behavior
The agent exits without a clear message, leaving the user unsure about what happened.