Add FTP credentials management and UI enhancements

- Implement migration script to add ftp_username and ftp_password columns to nl43_config table.
- Create set_ftp_credentials.py script for updating FTP credentials in the database.
- Update requirements.txt to include aioftp for FTP functionality.
- Enhance index.html with FTP controls including enable, disable, check status, and list files features.
- Add JavaScript functions for handling FTP operations and displaying file lists.

migrate_add_ftp_credentials.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+"""
+Migration script to add FTP username and password columns to nl43_config table.
+Run this once to update existing database schema.
+"""
+
+import sqlite3
+import sys
+from pathlib import Path
+
+DB_PATH = Path(__file__).parent / "data" / "slmm.db"
+
+
+def migrate():
+    """Add ftp_username and ftp_password columns to nl43_config table."""
+
+    if not DB_PATH.exists():
+        print(f"Database not found at {DB_PATH}")
+        print("No migration needed - database will be created with new schema")
+        return
+
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+
+    try:
+        # Check if columns already exist
+        cursor.execute("PRAGMA table_info(nl43_config)")
+        columns = [row[1] for row in cursor.fetchall()]
+
+        if "ftp_username" in columns and "ftp_password" in columns:
+            print("✓ FTP credential columns already exist, no migration needed")
+            return
+
+        # Add ftp_username column if it doesn't exist
+        if "ftp_username" not in columns:
+            print("Adding ftp_username column...")
+            cursor.execute("ALTER TABLE nl43_config ADD COLUMN ftp_username TEXT")
+            print("✓ Added ftp_username column")
+
+        # Add ftp_password column if it doesn't exist
+        if "ftp_password" not in columns:
+            print("Adding ftp_password column...")
+            cursor.execute("ALTER TABLE nl43_config ADD COLUMN ftp_password TEXT")
+            print("✓ Added ftp_password column")
+
+        conn.commit()
+        print("\n✓ Migration completed successfully!")
+        print("\nYou can now set FTP credentials via the web UI or database.")
+
+    except Exception as e:
+        conn.rollback()
+        print(f"✗ Migration failed: {e}", file=sys.stderr)
+        sys.exit(1)
+    finally:
+        conn.close()
+
+
+if __name__ == "__main__":
+    migrate()