Fix potential WebGL error in link hover detection

[Stukova]

Added buffer checks to skip hover detection and prevent findHoveredLine() from executing before buffers are initialized

Summary by CodeRabbit

• Bug Fixes
  • Improved hover detection reliability by preventing hover rendering until required rendering resources are initialized, avoiding spurious or missing hover responses.
• Chores
  • Bumped package version to 2.6.4.
  • Added a prepublish step to run the build before publishing.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Added defensive precondition checks in findHoveredLine to return early when required buffers or curve geometry are not initialized, preventing hover-detection rendering. Also bumped package.json version from 2.6.2 to 2.6.4 and added a prepublishOnly script.

Changes

Cohort / File(s)	Summary
Hover Detection Safety Guards src/modules/Lines/index.ts	Added early-return checks in findHoveredLine for pointsBuffer, linkIndexFbo, linkIndexBuffer, colorBuffer, widthBuffer, arrowBuffer, and curveLineGeometry/curveLineBuffer to avoid running hover rendering when resources are not ready.
Package Metadata package.json	Bumped version from 2.6.2 to 2.6.4 and added "prepublishOnly": "npm run build:vite" to scripts; adjusted script formatting.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 I peek at buffers before I bound,
No stray renders making a sound.
Geometry ready, indices in cheer,
I hop on through—no crashes here. ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately summarizes the main change: adding buffer precondition guards to prevent WebGL errors during link hover detection, which matches the primary code change in findHoveredLine.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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