refactor(local): move the update prompt from a banner to a title bar button

[AnishSarkar22]

Description

Motivation and Context

FIX #

Screenshots

API Changes

• This PR includes API changes

Change Type

• Bug fix
• New feature
• Performance improvement
• Refactoring
• Documentation
• Dependency/Build system
• Breaking change
• Other (specify):

Testing Performed

• Tested locally
• Manual/QA verification

Checklist

• Follows project coding standards and conventions
• Documentation updated as needed
• Dependencies updated as needed
• No lint/build errors or new warnings
• All relevant tests are passing

High-level PR Summary

This PR refactors the update notification UI from a full-width banner into a compact icon button in the title bar. The changes introduce a new --notice color variable to the design system for non-destructive attention-grabbing elements, replace the UpdateBanner component with an UpdateButton that appears in the dashboard's title bar controls, and update corresponding tests to reflect the new behavior. The update notification is now displayed as a ghost button with a download icon that only appears when an update is ready to install.

⏱️ Estimated Review Time: 15-30 minutes

💡 Review Order Suggestion

Order	File Path
1	.cursor/skills/color-system/PALETTE.css
2	surfsense_local/frontend/src/index.css
3	surfsense_local/frontend/src/components/ui/icons.tsx
4	surfsense_local/frontend/src/features/updates/update-settings.tsx
5	surfsense_local/frontend/src/features/dashboard/dashboard-page.tsx
6	surfsense_local/frontend/src/app/app-bootstrap.tsx
7	surfsense_local/frontend/src/features/updates/update-settings.test.tsx
8	surfsense_local/frontend/src/test-utils.tsx

[vercel]

@AnishSarkar22 is attempting to deploy a commit to the Rohan Verma's projects Team on Vercel.

A member of the Team first needs to authorize it.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 2c2c54bb-801b-4616-961b-5b140ff794ec

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}