fix: complete repository integration verification

[tnb1j]

Description

Completes repository-wide native integration verification and fixes the failures found across linting, CI, browser test orchestration, the development server, preview lifecycle, and Jolt physics behavior.

Key changes:

• Make npm test the shared deterministic release gate used by CI.
• Restore full-repository lint coverage while excluding generated and third-party sources.
• Implement and validate Jolt body position and velocity updates.
• Harden browser/server shutdown, occupied-port retries, malformed URL handling, and encoded traversal protection.
• Add deterministic server integration tests and regenerate affected Jolt documentation.

Verification

• npm.cmd test passed on Node.js 24.19.0 and 26.3.0.
• Core browser units: 1326 passed, 1 todo, 0 failed.
• Addon browser units: 15 passed, 0 failed.
• Native/legacy entry parity, brand sync, migration, tree shaking, and example coverage passed.
• Targeted WebGL/WebGPU screenshot checks and live Jolt smoke checks passed.
• npm.cmd audit reported 0 vulnerabilities.
• Full hardware-sensitive screenshot coverage was not run across every example/GPU environment.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	365.64 86.89	365.64 86.89	+0 B +0 B
WebGPU	679.61 188.59	679.61 188.59	+0 B +0 B
WebGPU Nodes	677.65 188.27	677.65 188.27	+0 B +0 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	507.69 123.44	507.69 123.44	+0 B +0 B
WebGPU	747.13 201.45	747.13 201.45	+0 B +0 B
WebGPU Nodes	697.48 189.04	697.48 189.04	+0 B +0 B