- Add step to check current branch and create feature branch if on
main/master
- Add task tracking requirement using TaskCreate/TaskUpdate tools
- Renumber steps and update summary to report new branch creation

#skip-bb

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Updates the pr-push skill to block pushes to main/master and auto-create
a PR, and adds required task tracking across pr-push and pr-fix so work
happens on feature branches with clear progress and a ready review link.

- **New Features**
- Check current branch; if on main/master, create and switch to a
descriptive feature branch and report its name.
- Require TaskCreate/TaskUpdate across pr-push and pr-fix to track each
step (create tasks, mark in_progress/completed).
- Auto-create a PR if none exists (no manual URL prompts), avoid
duplicates, and include the PR URL in the final summary; steps
renumbered to reflect the new flow.

<sup>Written for commit 81f38c98e48bf915a553dac23d1ec41474c27d0b.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>