Small model naming

[DOsinga]

Summary

This is probably going to take more effort than this, but we had some weird responses from smaller models. "the real result" was a common pattern.

[Copilot]

Pull request overview

This PR addresses issues with smaller language models that include reasoning in session name responses (e.g., "the real result" patterns) instead of returning only the title as requested. The solution combines a more explicit prompt instruction with a post-processing function that extracts the actual title from model output that may contain reasoning.

Changes:

• Updated session naming prompt to explicitly instruct "Do not show your reasoning"
• Added extract_short_title() function to extract titles from model outputs containing reasoning
• Added comprehensive test coverage for the title extraction logic

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
crates/goose/src/providers/base.rs	Implements extract_short_title() function to extract titles from quoted text or last line when model includes reasoning; integrates function into session name generation
crates/goose/src/prompts/session_name.md	Adds explicit instruction to prevent models from showing reasoning in their responses