Remove Polkadot tab from UI

[ericglau]

Temporarily disables the Polkadot tab from the UI. Keeps underlying logic, since we'll plan to re-enable it perhaps with more context.

[coderabbitai]

Walkthrough

Removed the Polkadot option from the UI by deleting the polkadot.html page and removing the Polkadot navigation link from Cairo, Index, Stellar, and Stylus public pages.

Changes

Cohort / File(s)	Summary
Remove Polkadot nav link packages/ui/public/cairo.html, packages/ui/public/index.html, packages/ui/public/stellar.html, packages/ui/public/stylus.html	Deleted the Polkadot navigation item from page headers; no other structural changes.
Delete Polkadot page packages/ui/public/polkadot.html	Removed the entire Polkadot public page (static HTML with associated includes).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The title clearly identifies the removal of the Polkadot tab from the UI, which is the primary change introduced by this pull request. It is concise and directly references the main modification without extraneous details or vague language. A teammate glancing at the history can immediately understand that the Polkadot navigation option is being removed.
Description Check	✅ Passed	The description accurately explains that the pull request temporarily disables the Polkadot tab while preserving the underlying logic for future re-enablement, which directly matches the changes in the PR. It is clearly related to the modifications and succinctly communicates the intent without drifting off-topic. This level of detail is sufficient for a lenient description check.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 450ab48 and 8801a79.

📒 Files selected for processing (5)

• packages/ui/public/cairo.html (0 hunks)
• packages/ui/public/index.html (0 hunks)
• packages/ui/public/polkadot.html (0 hunks)
• packages/ui/public/stellar.html (0 hunks)
• packages/ui/public/stylus.html (0 hunks)

💤 Files with no reviewable changes (5)

• packages/ui/public/stylus.html
• packages/ui/public/stellar.html
• packages/ui/public/index.html
• packages/ui/public/cairo.html
• packages/ui/public/polkadot.html

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: build (solidity, default)
• GitHub Check: semgrep-cloud-platform/scan

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