chore: clean up untracked files and gitignore .claude/ directory

- Add make_superadmin utility scripts (list users, promote to super admin)
- Gitignore entire .claude/ directory (agents, settings, plans)
- Delete leftover tailwind-config-snippet.js and dual-mode plan doc

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

.gitignore

@@ -206,8 +206,8 @@ marimo/_static/
 marimo/_lsp/
 __marimo__/
 
-# Claude Code (local settings with permissions/tokens)
-.claude/settings.local.json
+# Claude Code (local config, agents, settings)
+.claude/
 
 # Railway CLI (local tooling)
 node_modules/

backend/make_superadmin.py

@@ -0,0 +1,73 @@
+"""Script to promote a user to super admin."""
+import asyncio
+import sys
+from sqlalchemy import select
+from app.core.database import async_session_maker
+
+# Import models to ensure they're registered
+import app.models.user
+import app.models.tree
+import app.models.account
+from app.models.user import User
+
+
+async def make_super_admin(email: str):
+    """Promote a user to super admin by email."""
+    async with async_session_maker() as db:
+        result = await db.execute(select(User).where(User.email == email))
+        user = result.scalar_one_or_none()
+
+        if not user:
+            print(f"❌ User not found: {email}")
+            return False
+
+        if user.is_super_admin:
+            print(f"✅ {email} is already a super admin")
+            return True
+
+        user.is_super_admin = True
+        await db.commit()
+        print(f"✅ {email} promoted to super admin")
+        return True
+
+
+async def list_users():
+    """List all users and their admin status."""
+    async with async_session_maker() as db:
+        result = await db.execute(
+            select(User.email, User.is_super_admin, User.is_active)
+            .order_by(User.created_at)
+        )
+        users = result.all()
+
+        if not users:
+            print("No users found")
+            return
+
+        print("\n📋 Current users:")
+        print("-" * 60)
+        for email, is_super_admin, is_active in users:
+            admin_badge = "🔑 SUPER ADMIN" if is_super_admin else ""
+            active_badge = "✅" if is_active else "❌ INACTIVE"
+            print(f"{active_badge} {email:40} {admin_badge}")
+        print("-" * 60)
+
+
+async def main():
+    if len(sys.argv) < 2:
+        print("Usage:")
+        print("  python make_superadmin.py list              - List all users")
+        print("  python make_superadmin.py <email>           - Promote user to super admin")
+        sys.exit(1)
+
+    command = sys.argv[1]
+
+    if command == "list":
+        await list_users()
+    else:
+        email = command
+        await make_super_admin(email)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

backend/make_superadmin_simple.py

@@ -0,0 +1,73 @@
+"""Simple script to promote a user to super admin using raw SQL."""
+import asyncio
+import sys
+from sqlalchemy import text
+from app.core.database import engine
+
+
+async def make_super_admin(email: str):
+    """Promote a user to super admin by email."""
+    async with engine.begin() as conn:
+        # Check if user exists
+        result = await conn.execute(
+            text("SELECT email, is_super_admin FROM users WHERE email = :email"),
+            {"email": email}
+        )
+        row = result.fetchone()
+
+        if not row:
+            print(f"[X] User not found: {email}")
+            return False
+
+        if row[1]:  # is_super_admin
+            print(f"[OK] {email} is already a super admin")
+            return True
+
+        # Promote to super admin
+        await conn.execute(
+            text("UPDATE users SET is_super_admin = TRUE WHERE email = :email"),
+            {"email": email}
+        )
+        print(f"[OK] {email} promoted to super admin")
+        return True
+
+
+async def list_users():
+    """List all users and their admin status."""
+    async with engine.connect() as conn:
+        result = await conn.execute(
+            text("SELECT email, is_super_admin, is_active FROM users ORDER BY created_at")
+        )
+        rows = result.fetchall()
+
+        if not rows:
+            print("No users found")
+            return
+
+        print("\nCurrent users:")
+        print("-" * 70)
+        for email, is_super_admin, is_active in rows:
+            admin_badge = "[SUPER ADMIN]" if is_super_admin else ""
+            active_badge = "[ACTIVE]" if is_active else "[INACTIVE]"
+            print(f"{active_badge:12} {email:40} {admin_badge}")
+        print("-" * 60)
+
+
+async def main():
+    if len(sys.argv) < 2:
+        print("Usage:")
+        print("  python make_superadmin_simple.py list              - List all users")
+        print("  python make_superadmin_simple.py <email>           - Promote user to super admin")
+        sys.exit(1)
+
+    command = sys.argv[1]
+
+    if command == "list":
+        await list_users()
+    else:
+        email = command
+        await make_super_admin(email)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())