Initial implementation of TriggerShell

A Python CLI (typer) that bootstraps Node/pnpm and launches a Next.js 16 web
app for running configured shell scripts: YAML config validated by a shared
Zod schema, dynamic per-script forms mapped to shadcn controls, argv-safe
execa execution with live WebSocket streaming, SQLite/Drizzle run history,
and optional argon2 session + API token auth.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/test_config.py

@@ -0,0 +1,70 @@
+from pathlib import Path
+
+import pytest
+
+from triggershell.config import ConfigError, preflight_check
+
+
+def write(tmp_path: Path, content: str) -> Path:
+    path = tmp_path / "triggershell.config.yaml"
+    path.write_text(content)
+    return path
+
+
+def test_missing_file_raises(tmp_path: Path) -> None:
+    with pytest.raises(ConfigError, match="not found"):
+        preflight_check(tmp_path / "missing.yaml")
+
+
+def test_invalid_yaml_raises(tmp_path: Path) -> None:
+    path = write(tmp_path, "scripts: [this is not: valid: yaml")
+    with pytest.raises(ConfigError, match="parse YAML"):
+        preflight_check(path)
+
+
+def test_non_mapping_root_raises(tmp_path: Path) -> None:
+    path = write(tmp_path, "- just\n- a\n- list\n")
+    with pytest.raises(ConfigError, match="mapping"):
+        preflight_check(path)
+
+
+def test_empty_file_is_ok(tmp_path: Path) -> None:
+    path = write(tmp_path, "")
+    data = preflight_check(path)
+    assert data == {}
+
+
+def test_script_missing_id_raises(tmp_path: Path) -> None:
+    path = write(tmp_path, "scripts:\n  - name: no id here\n")
+    with pytest.raises(ConfigError, match="missing a non-empty 'id'"):
+        preflight_check(path)
+
+
+def test_duplicate_script_id_raises(tmp_path: Path) -> None:
+    path = write(
+        tmp_path,
+        """
+scripts:
+  - id: dup
+    name: One
+  - id: dup
+    name: Two
+""",
+    )
+    with pytest.raises(ConfigError, match="duplicate script id"):
+        preflight_check(path)
+
+
+def test_valid_minimal_config_passes(tmp_path: Path) -> None:
+    path = write(
+        tmp_path,
+        """
+scripts:
+  - id: hello
+    name: Hello
+    command: echo
+""",
+    )
+    data = preflight_check(path)
+    assert len(data["scripts"]) == 1
+    assert data["scripts"][0]["id"] == "hello"