🛡️ Sentinel: [MEDIUM] Add missing input length limit to prevent DoS

[dhaatrik]

🚨 Severity: MEDIUM
💡 Vulnerability: The target-alt-input element in ManeuverPlannerDOM.ts lacked length boundaries (maxLength or max), which could allow users to paste excessively large strings or numbers, potentially causing client-side memory exhaustion or parsing overhead.
🎯 Impact: Denial of Service (DoS) risk on the client side due to unbounded memory allocation when parsing massive strings.
🛠️ Fix: Added both max: 1000000000 and maxLength: 20 to the dynamically created target-alt-input to establish defense-in-depth boundaries against excessively large input values.
✅ Verification: Ran pnpm lint and pnpm test successfully to confirm no regressions were introduced. Visually verified the codebase patch applies the required attributes to the DOM node creation object.

---

PR created automatically by Jules for task 771042546150796639 started by @dhaatrik

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.