initial: novel-app snapshot

services/__init__.py

@@ -0,0 +1,7 @@
+"""Service layer for the novel app.
+
+Pure functions — no Flask imports. LLM access, book deconstruction (拆书),
+and chapter writing with context assembly. All DB access goes through
+explicit sqlite3 connections (row_factory=sqlite3.Row) and repository
+functions. SSE framing helpers live here for use by routes/.
+"""