FG Scan form validation improvements with warehouse module updates

- Fixed 3 JavaScript syntax errors in fg_scan.html (lines 951, 840-950, 1175-1215)
- Restored form field validation with proper null safety checks
- Re-enabled auto-advance between form fields
- Re-enabled CP code auto-complete with hyphen detection
- Updated validation error messages with clear format specifications and examples
- Added autocomplete='off' to all input fields
- Removed auto-prefix correction feature
- Updated warehouse routes and modules for box assignment workflow
- Added/improved database initialization scripts
- Updated requirements.txt dependencies

Format specifications implemented:
- Operator Code: OP + 2 digits (example: OP01, OP99)
- CP Code: CP + 8 digits + hyphen + 4 digits (example: CP00000000-0001)
- OC1/OC2 Codes: OC + 2 digits (example: OC01, OC99)
- Defect Code: 3 digits only

app/__init__.py

@@ -3,6 +3,7 @@ Quality App v2 - Flask Application Factory
 Robust, modular application with login, dashboard, and multiple modules
 """
 from flask import Flask
+from flask_session import Session
 from datetime import datetime, timedelta
 import os
 import logging
@@ -35,6 +36,18 @@ def create_app(config=None):
     app.config['SESSION_COOKIE_SECURE'] = False  # Set True in production with HTTPS
     app.config['SESSION_COOKIE_HTTPONLY'] = True
     app.config['SESSION_COOKIE_SAMESITE'] = 'Lax'
+    app.config['SESSION_COOKIE_NAME'] = 'quality_app_session'
+    app.config['SESSION_REFRESH_EACH_REQUEST'] = True
+    
+    # Use filesystem for session storage (works with multiple gunicorn workers)
+    sessions_dir = os.path.join(app.config.get('LOG_DIR', '/app/data/logs'), '..', 'sessions')
+    os.makedirs(sessions_dir, exist_ok=True)
+    app.config['SESSION_TYPE'] = 'filesystem'
+    app.config['SESSION_FILE_DIR'] = sessions_dir
+    app.config['SESSION_FILE_THRESHOLD'] = 500
+    
+    # Initialize Flask-Session
+    Session(app)
     
     # Initialize database connection
     logger.info("Initializing database connection...")