fix(site): restrict local preview server to localhost and rename cache key

[hellobertrand]

Bind the preview server to 127.0.0.1 to avoid potential exposure on network interfaces. Additionally, rename the localStorage key to follow consistent naming conventions.

Summary by CodeRabbit

• Updates
  • The preview server now accepts connections only from the same device, rather than from other devices on the network.
  • GitHub star-count caching behavior is unchanged.
  • No other user-visible behavior has changed.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 5323072a-ee1f-4897-8c80-d2f33f6f7930

📥 Commits

Reviewing files that changed from the base of the PR and between 9532d72 and facb31f.

📒 Files selected for processing: 2

• site/build.mjs
• site/src/assets/site.js

Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 1 remain after this review.

📝 Walkthrough

The preview server now binds to 127.0.0.1. The GitHub star-count cache uses the local variable name CACHE instead of KEY, with the stored key and caching behavior unchanged.

Changes: Preview server binding

Layer / File(s)	Summary
Bind preview listener site/build.mjs	The preview server listener now binds to 127.0.0.1.

Star-count cache variable

Layer / File(s)	Summary
Rename cache-key variable site/src/assets/site.js	The cache lookup and write now use CACHE instead of KEY. The stored key and caching behavior are unchanged.

Priority: ➖ Normal

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to facb3

The preview server is restricted to the stated local interface, and the cache rename preserves existing behavior. No material merge risk is identified.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes both changes: restricting the local preview server to localhost and renaming the cache key.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches: 💡 1

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