Initial commit — MarineInvoice v1.0

Multi-tenant marine invoicing system: Stripe payments, PDF generation,
digital signatures, QR codes, SMTP email, bilingual templates.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

fix_db.py

@@ -0,0 +1,30 @@
+"""
+Ejecutar UNA SOLA VEZ para agregar las columnas nuevas a la DB existente.
+Comando: python fix_db.py
+"""
+import sqlite3, os
+
+DB_PATH = os.path.join('instance', 'marineinvoice.db')
+
+columns_to_add = [
+    ("document",  "payment_token",          "TEXT"),
+    ("company",   "stripe_secret_key",       "TEXT"),
+    ("company",   "stripe_publishable_key",  "TEXT"),
+]
+
+conn = sqlite3.connect(DB_PATH)
+cur  = conn.cursor()
+
+for table, column, col_type in columns_to_add:
+    # Verificar si la columna ya existe antes de agregarla
+    cur.execute(f"PRAGMA table_info({table})")
+    existing = [row[1] for row in cur.fetchall()]
+    if column not in existing:
+        cur.execute(f"ALTER TABLE {table} ADD COLUMN {column} {col_type}")
+        print(f"✅ Agregada: {table}.{column}")
+    else:
+        print(f"⏭️  Ya existe: {table}.{column}")
+
+conn.commit()
+conn.close()
+print("\n✅ DB actualizada. Ya puedes reiniciar el servidor.")