feat: integrate Sensei Spook mascot in 4 stances, speech bubbles, and style updates

.gitignore

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+# Dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# Testing
+/coverage
+
+# Next.js build output
+/.next/
+/out/
+
+# Production
+/build
+
+# Environment variables & secrets
+.env*.local
+.env
+!.env.example
+
+# Vercel
+.vercel
+
+# TypeScript
+*.tsbuildinfo
+next-env.d.ts
+
+# Logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# OS / Editor files
+.DS_Store
+Thumbs.db
+*.swp
+.vscode/
+.idea/
+
+# Uploaded / Generated user images & data backups
+/data/images/
+/data/records.json
+/data/*.json
+/data/*.bak
+/data/*.tmp