Fix missing bible import in study guides routes

The bible module was only imported inside get_books() but was
referenced in study_guide_detail() for verse lookups, causing
all verse texts to fail silently.

Also excludes .venv from Docker volume mount to prevent
local/container environment conflicts.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docker-compose.yml

@@ -5,6 +5,7 @@ services:
       - "8000:8000"
     volumes:
       - .:/app
+      - /app/.venv
     environment:
       - PYTHONUNBUFFERED=1
       - PRELOAD_INTERLINEAR=true

kjvstudy_org/routes/study_guides.py

@@ -4,6 +4,7 @@ This module contains the study guides routes and content.
 """
 from fastapi import APIRouter, Request, HTTPException
 from fastapi.responses import HTMLResponse
+from ..kjv import bible
 
 router = APIRouter(tags=["Study Guides"])
 
@@ -19,7 +20,6 @@ def init_templates(app_templates):
 
 def get_books():
     """Get list of Bible books."""
-    from ..kjv import bible
     return list(bible.iter_books())