Add Gitea PR automation script

- Create automation/gitea-pr.sh for auto-creating PRs via Gitea API
- Update CLAUDE.md with git workflow using the new script
- Deprecate redundant git instructions in PA general-instructions.json
- Token stored securely at ~/.config/gitea-token

Usage: gitea-pr.sh "PR Title" "Description"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -80,6 +80,25 @@ All agents MUST read and follow the processes defined in these files:
 - Session overrides in `state/sysadmin/session-autonomy.json`
 - See `state/autonomy-levels.json` for level definitions
 
+### Git Workflow
+This repo uses Gitea (not GitHub). Follow this workflow:
+
+1. **Create feature branch**: `git checkout -b feature/descriptive-name`
+2. **Commit work**: Make atomic commits with clear messages
+3. **Rebase onto main**: `git rebase origin/main`
+4. **Push branch**: `git push -u origin feature/branch-name`
+5. **Create PR**: `~/.claude/automation/gitea-pr.sh "PR Title" "Description"`
+6. **Merge with rebase** (after user approval):
+   ```bash
+   git checkout main && git rebase feature/branch-name && git push
+   ```
+
+Notes:
+- Use rebase, not merge commits
+- Stash uncommitted state files before switching branches
+- Delete feature branches after merge
+- Gitea token stored at `~/.config/gitea-token`
+
 ## Component Formats
 
 | Component | Format | Location |