feat(01-01): scaffold Vite project with CSS design system and project structure

- Vite 6 + TypeScript + Biome + Vitest configured
- All directories from spec section 13 created
- CSS custom properties for full color palette and finger colors
- index.html with 5 screen sections and Google Fonts
- Dev server binds to 0.0.0.0:5173 for VPS access

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,20 @@
+{
+	"compilerOptions": {
+		"target": "ES2020",
+		"useDefineForClassFields": true,
+		"module": "ESNext",
+		"lib": ["ES2020", "DOM", "DOM.Iterable"],
+		"skipLibCheck": true,
+		"moduleResolution": "bundler",
+		"allowImportingTsExtensions": true,
+		"isolatedModules": true,
+		"moduleDetection": "force",
+		"noEmit": true,
+		"strict": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"noFallthroughCasesInSwitch": true,
+		"noUncheckedIndexedAccess": true
+	},
+	"include": ["src"]
+}