refactor: step 2 - extract domain services (tasks, prompts, snapshots, knowledge)

services/prompts/service.py

@@ -0,0 +1,37 @@
+"""
+===============================================================================
+FILE: services/prompts/service.py
+PROJECT: SCUD Orion AI (Unified Architecture)
+MODULE: services / prompts
+ROLE: Единый доменный сервис управления системным промптом.
+===============================================================================
+"""
+
+from typing import Tuple, Dict, Any
+from .repository import repo_get_active_prompt, repo_apply_prompt_action, repo_save_full_prompt
+from .diff_engine import build_prompt_diff
+
+
+def get_active_system_prompt() -> str:
+    """Получить текущий активный системный промпт."""
+    return repo_get_active_prompt()
+
+
+def apply_prompt_action(action: str, section_id: int, item_id: int, content: str = "") -> None:
+    """Применить точечное изменение к узлу промпта."""
+    repo_apply_prompt_action(action, section_id, item_id, content)
+
+
+def save_full_prompt_draft(draft_text: str) -> None:
+    """Сохранить полный черновик промпта."""
+    repo_save_full_prompt(draft_text)
+
+
+def create_prompt_preview(action: str, section_id: int, item_id: int, content: str = "") -> Tuple[str, str, str]:
+    """
+    Формирует черновик и diff.
+    Возвращает (merged_draft, diff_html, baseline_prompt).
+    """
+    baseline = repo_get_active_prompt()
+    draft, diff_html = build_prompt_diff(action, section_id, item_id, content)
+    return draft, diff_html, baseline