rebrand to 3D Portfolio, fix bugs, add vitest config

rebrand:
- rename Severance/Lumon/MDR/Macrodata/Refinement vocab to
  Office/Workstation/Work/Workspace across code, comments, strings
- rename files: SeveranceEnvironment.js -> OfficeEnvironment.js,
  SeveranceMaterials.js -> OfficeMaterials.js,
  SeveranceCorridorMap.js -> CorridorMap.js,
  MDREnvironment.js -> WorkstationEnvironment.js,
  severance_tv_show_office.glb -> office.glb
- move Neue Montreal font into src/assets/fonts for proper Vite bundling
- update package.json name and description, README

bug fixes:
- THREE.ClampToEdgeWrap -> ClampToEdgeWrapping (was undefined, broke
  texture wrapping silently)
- office model load: getRootModelPath -> getModelPath (was 404,
  Vite served index.html SPA fallback as the GLB)
- convert dynamic three.js postprocessing imports to static
- consolidate getRootModelPath calls to getModelPath in OfficeEnvironment
- guard window writes in constructor/dispose for non-DOM contexts
- remove dead /public/src/shaders/wall.glsl literal fallback in
  OfficeMaterials.js
- refactor assetPaths.js to use import.meta.env.BASE_URL instead of
  hardcoded /3D-Portfolio/

infra/cleanup:
- add vitest.config.js with jsdom env (8+ more tests pass)
- add manualChunks: app bundle 1158 kB -> 236 kB; three -> 672 kB,
  vendor -> 247 kB
- add .claude/ to .gitignore
- delete orphan src/shaders/ (public/shaders/ is canonical and
  contains more developed versions)
- stop tracking dist/ build output (regenerated by CI)

Author: parsaa74

.gitignore

@@ -20,6 +20,7 @@ build/
 *.swp
 *.swo
 .cursor/
+.claude/
 
 # Logs
 npm-debug.log*
@@ -63,8 +64,6 @@ untitled.blend1
 door.blend
 door.blend1
 
-# Test Configuration
-vitest.config.js
 
 # Development Images
 52bbahgze5w81.jpg