Scaffold backend (FastAPI/uv) and frontend (SvelteKit/bun)

Backend: FastAPI app with health check, AppError hierarchy, stderr
logging via LOG_LEVEL, ruff+pyright(strict) config, pytest passing.

Frontend: SvelteKit (TS) with prettier, eslint, vitest (unit +
component), adapter-node for self-hosted deployment on Zeus.

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

frontend/package.json

@@ -0,0 +1,40 @@
+{
+	"name": "frontend",
+	"private": true,
+	"version": "0.0.1",
+	"type": "module",
+	"scripts": {
+		"dev": "vite dev",
+		"build": "vite build",
+		"preview": "vite preview",
+		"prepare": "svelte-kit sync || echo ''",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"lint": "prettier --check . && eslint .",
+		"format": "prettier --write .",
+		"test:unit": "vitest",
+		"test": "bun run test:unit -- --run"
+	},
+	"devDependencies": {
+		"@eslint/js": "^10.0.1",
+		"@sveltejs/adapter-node": "^5.5.4",
+		"@sveltejs/kit": "^2.63.0",
+		"@sveltejs/vite-plugin-svelte": "^7.1.2",
+		"@types/node": "^22",
+		"@vitest/browser-playwright": "^4.1.8",
+		"eslint": "^10.4.1",
+		"eslint-config-prettier": "^10.1.8",
+		"eslint-plugin-svelte": "^3.19.0",
+		"globals": "^17.6.0",
+		"playwright": "^1.60.0",
+		"prettier": "^3.8.3",
+		"prettier-plugin-svelte": "^4.1.0",
+		"svelte": "^5.56.1",
+		"svelte-check": "^4.6.0",
+		"typescript": "^6.0.3",
+		"typescript-eslint": "^8.60.1",
+		"vite": "^8.0.16",
+		"vitest": "^4.1.8",
+		"vitest-browser-svelte": "^2.1.1"
+	}
+}