#10757: chore: bump pi-coding-agent and pi-tui to 0.52.7

## Summary - Bumps `@mariozechner/pi-coding-agent` from 0.52.6 to 0.52.7 - Bumps `@mariozechner/pi-tui` from 0.52.6 to 0.52.7 This adds `claude-opus-4-6` to the model registry. Without this bump, the gateway returns `Unknown model: anthropic/claude-opus-4-6` when configured to use Opus 4.6. ## Test plan - [x] Configured `DEFAULT_MODEL` to `claude-opus-4-6` and verified the gateway starts without error - [x] Confirmed `openclaw models list` includes `claude-opus-4-6` - [x] Verified agent responds successfully with the new model 🤖 Generated with [Claude Code](https://claude.com/claude-code) <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> - Updates `@mariozechner/pi-coding-agent` and `@mariozechner/pi-tui` from `0.52.6` to `0.52.7` in `package.json`. - Refreshes `pnpm-lock.yaml` to pull in `0.52.7` snapshots, including new entries for `pi-agent-core@0.52.7` and `pi-ai@0.52.7`. - Intended to add support for the `claude-opus-4-6` model via the bumped upstream packages. <h3>Confidence Score: 3/5</h3> - Mostly safe to merge, but lockfile inconsistency can break installs in CI or for contributors using frozen lockfiles. - The PR is a small dependency bump, but `pnpm-lock.yaml` currently pins `@mariozechner/pi-agent-core` and `@mariozechner/pi-ai` to 0.52.6 while also including 0.52.7 snapshots required by `pi-coding-agent@0.52.7`, which is a concrete correctness risk for reproducible installs. - pnpm-lock.yaml (importers section for pi-agent-core and pi-ai) <!-- greptile_other_comments_section --> <!-- /greptile_comment -->