feat: show AI progress and configure prompt directory

tests/test_config_services.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import unittest
+from pathlib import Path
 from unittest.mock import patch
 
 from app.config import _parse_ai_config, _parse_elevenlabs_config
@@ -65,6 +66,7 @@ class ConfigAiTests(unittest.TestCase):
             "DEEPSEEK_MODEL": "env-ds-model",
             "AI_WEB_PAGE_TIMEOUT_SECONDS": "30",
             "AI_WEB_PAGE_MAX_CHARS": "54321",
+            "AI_PROMPT_DIR": "alternate-prompts",
         }
         with patch.dict("os.environ", env, clear=True):
             config = _parse_ai_config({})
@@ -75,6 +77,7 @@ class ConfigAiTests(unittest.TestCase):
         self.assertEqual(config.deepseek.model, "env-ds-model")
         self.assertEqual(config.web_page_timeout_seconds, 30)
         self.assertEqual(config.web_page_max_chars, 54321)
+        self.assertEqual(config.prompt_dir, Path("alternate-prompts"))
 
 
 if __name__ == "__main__":