restructure routes under app/, add konsta layout

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -13,9 +13,11 @@
 		"prepare": "simple-git-hooks"
 	},
 	"dependencies": {
+		"@electric-sql/pglite": "^0.3.15",
 		"@tanstack/react-router": "^1.120.3",
 		"class-variance-authority": "^0.7.1",
 		"clsx": "^2.1.1",
+		"konsta": "^5.0.7",
 		"lucide-react": "^0.575.0",
 		"radix-ui": "^1.4.3",
 		"react": "^19.1.0",