Refactor UI components and convert controls to select elements

- Extract InfoBox component for reusable alert boxes
- Update AccountForm to use InfoBox component
- Add InfoBox with explanatory text to tenant sections in LocationEditForm
- Convert billFwdStrategy from radio buttons to select element
- Convert updateScope from radio buttons to select element
- Update localization strings for improved clarity
- Fix updateScope defaultValue to use "current" instead of billFwdStrategy

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

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

app/ui/InfoBox.tsx

@@ -0,0 +1,9 @@
+import { FC, ReactNode } from "react";
+
+export const InfoBox: FC<{ children: ReactNode, className?: string }> = ({ children, className }) =>
+    <div className={`alert max-w-md flex flex-row items-start gap-[0.5rem] ${className}`}>
+        <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" className="stroke-current shrink-0 w-6 h-6">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
+        </svg>
+        <span className="text-left">{children}</span>
+    </div>