Chrome Extension Upgrade: Multi-Language & Email Integration

Seeking experienced dev to enhance my Manifest V3 Chrome Extension "Freelancer Lead Tracker" (JS/HTML/CSS, backend API integrated). Source code shared on hire; demo:

https://chromewebstore.google.com/detail/freelancer-lead-tracker/gnhcigakdgpjkedblbkpopjfkgecbpkf

Key Features:

Multi-Language (i18n): Support 5-10 languages (e.g., English, Spanish, French, Arabic, Chinese) with selector & RTL (use i18next).
Email Integration: Send reports/notifications via Gmail API/SendGrid; add "Email Lead" button & templates.
Reminders: Set timed follow-ups with Chrome alarms/notifications; show "Due Reminders" section with snooze.

Requirements:

Expertise in Chrome Extensions, JS/ES6, i18n, APIs (Gmail/SendGrid, alarms/notifications).
Secure, performant code; no breaking existing features.

Deliverables:

Updated code, docs, testing report.

Timeline/Budget:

7-14 days.
$250-700.

Bid with experience, feature breakdown, questions.