feat(omx): integrate interactive 3D assembly guide

[Woojin-Crive]

Summary

Replace the video-only OMX Assembly Guide with preparation instructions and an embedded, interactive 3D workspace at the existing documentation URL. Readers can inspect each connection, change the camera view, replay assembly steps, and resume progress locally. The original assembly videos remain available in the Videos view.

• Support OMX Leader and Follower, with visual selection of BIC30 or legacy XL4015 hardware. Legacy differences are scoped to the upper link, converter mounting, and wiring.
• Include part/package labels, sequential fastening and connector insertion, frame-guided cable routing, and shareable model/step links.
• Explain factory-preset actuator IDs and horn reference marks using CAD-derived WebP illustrations.
• Isolate the Three.js viewer in a same-origin iframe, load only the selected model, and release the viewer when leaving the 3D view.
• Integrate model preparation, viewer tests, and asset checks into the Docusaurus build, CI, and Docker development workflow. Use Node.js 22.12+ for the viewer toolchain.

Assets and maintenance

The three losslessly compressed model exports total approximately 36.4 MB in Git. SHA-256 manifests verify decompression; the built application keeps one shared asset copy across locales. Original STEP/Gerber/Blender sources, generated bundles, and new rendered films are not included. The application README documents asset provenance and illustration regeneration. Three.js and Inter notices are included separately from ROBOTIS asset and trademark rights.

Validation

• 33 viewer regression tests passed; Docusaurus type checking passed.
• English and Korean production builds passed individually, following the repository's per-locale build workflow. Existing HTML-minifier and Node.js 26 localStorage warnings remain.
• Verified the deployed guide, Follower BIC30/XL4015 switching, and deep-link loading; compared deployed HTML/model/image hashes with the local build.
• Formatting and staged whitespace checks passed.

Preview the assembly guide

Hardware-specific instructions and mobile interaction still benefit from reviewer validation; automated checks do not replace a physical assembly review.

[sunghowoo]

LGTM

[YoungWook0533]

Great!