feat: rebuild AI commands and migrate config to TOML

tests/test_config_toml.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+from app.config import load_app_config
+
+
+class TomlConfigTests(unittest.TestCase):
+    def test_loads_default_toml_config(self) -> None:
+        with tempfile.TemporaryDirectory() as temp_dir:
+            root = Path(temp_dir)
+            (root / "config.toml").write_text(
+                """
+api_id = 123456
+api_hash = "hash"
+session_dir = "sessions"
+
+[[accounts]]
+name = "personal"
+session = "personal"
+
+[elevenlabs]
+api_key = "test-key"
+model_id = "scribe_v2"
+""".strip(),
+                encoding="utf-8",
+            )
+
+            with patch.dict("os.environ", {}, clear=True):
+                config = load_app_config(root)
+
+        self.assertEqual(config.api_id, 123456)
+        self.assertEqual(config.accounts[0].session, "personal")
+        self.assertEqual(config.elevenlabs.api_key, "test-key")
+        self.assertEqual(config.session_dir, root / "sessions")
+        self.assertEqual(config.ai.prompt_dir, root / "prompts")
+        self.assertEqual(config.ai.base_dir, root)
+
+
+if __name__ == "__main__":
+    unittest.main()