Fix/dashboard responsive UI

[2024itb047samata]

Changes Made

• Added responsive dashboard layout (grid-cols-1 md:grid-cols-2)
• Added safer fallback color for unknown track IDs
• Added default prop values for title and trackId
• Updated bounding box positioning to use responsive percentages
• Added .env and .env.* to .gitignore

Addresses UI responsiveness and safety review comments for the multi-camera dashboard.
closes #37

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Configuration used: defaults

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Run ID: 0dfc3598-1aee-4f46-877d-e6ba7e275065

📥 Commits

Reviewing files that changed from the base of the PR and between 388ef8d and 24c1625.

⛔ Files ignored due to path filters (6)

• apps/dashboard/package-lock.json is excluded by !**/package-lock.json
• apps/dashboard/public/favicon.svg is excluded by !**/*.svg
• apps/dashboard/public/icons.svg is excluded by !**/*.svg
• apps/dashboard/src/assets/hero.png is excluded by !**/*.png
• apps/dashboard/src/assets/react.svg is excluded by !**/*.svg
• apps/dashboard/src/assets/vite.svg is excluded by !**/*.svg

📒 Files selected for processing (15)

• apps/dashboard/.gitignore
• apps/dashboard/README.md
• apps/dashboard/eslint.config.js
• apps/dashboard/index.html
• apps/dashboard/package.json
• apps/dashboard/postcss.config.js
• apps/dashboard/src/App.css
• apps/dashboard/src/App.jsx
• apps/dashboard/src/components/CameraCard.jsx
• apps/dashboard/src/index.css
• apps/dashboard/src/main.jsx
• apps/dashboard/src/pages/Dashboard.jsx
• apps/dashboard/src/utils/colors.js
• apps/dashboard/tailwind.config.js
• apps/dashboard/vite.config.js

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[2024itb047samata]

Kindly add GSSoC approved tag and the level of difficulty please in all my prs. Thanks @Devnil434