DEVX-142: fix: tea CLI login failure handling, error messages, release retry

AGENTS.md

@@ -71,7 +71,7 @@ src/devx/
 ├── translations.json    # Translation strings (en, bg, de, pl, ru, zh)
 ├── ci/                  # CI/CD automation modules (run by workflows)
 │   ├── release.py       # Automated versioning, tagging, changelog
-│   ├── publish.py       # Build and publish to Gitea PyPI registry (--skip-build for non-Python repos)
+│   ├── publish.py       # Build, publish to Gitea PyPI registry, create Gitea release (with retry)
 │   ├── auto_merge.py    # Squash-merge PRs with task ID validation
 │   ├── check_auto_merge_ready.py  # Pre-merge validation gate (branch, PR title, Vikunja, behind-master)
 │   ├── _shared.py      # Shared utilities (get_latest_tag)
@@ -310,6 +310,20 @@ by `python -m devx.tools.install_tools` and configured by
 - `create_pr()` / `merge_pr()` / `review_pr()` — Pull request operations
 - `create_release()` / `list_releases()` — Release management
 
+**`devx.gitea_cli.configure_tea_login()`** — Configures tea login in
+containerized CI environments where `make setup` was not called. Used by
+`publish.py` (`--auto-login`) and `notify_failure.py` (`--auto-login`).
+Raises `TeaCLIError` if login configuration fails — this prevents cryptic
+"no available login" errors from subsequent tea commands.
+
+**Error handling**: `TeaCLI._run()` includes both stdout and stderr in
+`TeaCLIError` messages, because `tea` writes some errors (for example,
+"no available login") to stdout, not stderr.
+
+**Release creation retry**: `publish.py` retries Gitea release creation
+up to 3 times with exponential backoff (2s, 4s) on transient failures.
+"Already exists" errors are treated as success (idempotent).
+
 ### git-cliff Commit Preprocessing
 
 Merge commits on master have the format `DEVX-N: <conventional commit>`. The