docs: add tea newline troubleshooting and runlog (#271)

workflow/issue-271-runlog.md

@@ -0,0 +1,37 @@
+# Issue #271 Workflow Run Log
+
+## 2026-02-26
+
+### Step 1: Gitea issue creation
+- Attempt 1: Succeeded, but formatting degraded
+  - Command style: `tea issues create -t ... -d "...\n..."`
+  - Symptom: Issue body rendered literal `\n` text in web UI instead of line breaks
+- Root cause
+  - `tea` does not provide `--description-file`
+  - Shell-escaped `\n` inside double quotes is passed as backslash+n text
+- Resolution
+  - Build body with heredoc and pass as variable (`-d "$ISSUE_BODY"`)
+
+### Step 2: PR description creation
+- Attempt 1: Succeeded, but same newline rendering risk detected
+- Resolution
+  - Same heredoc variable pattern applied for PR body (`--description "$PR_BODY"`)
+
+### Preventive Action
+- `docs/workflow.md` updated with "Gitea CLI Formatting Troubleshooting" section
+- Standard command templates added for issues and PRs
+
+### Reusable Safe Template
+```bash
+ISSUE_BODY=$(cat <<'EOF'
+## Summary
+- item A
+- item B
+
+## Scope
+- docs only
+EOF
+)
+
+tea issues create -t "title" -d "$ISSUE_BODY"
+```