feat: add stock indicators route and Alpaca account info

- New /stocks route with StockViewer component
- New /api/indicators endpoint with SMA, EMA, RSI, MACD
- New /api/alpaca/account endpoint
- AlpacaAccountInfo component on home page
- Indicator calculation utilities
- Tests for utilities and components
- Vite proxy config for /api

package.json

@@ -6,11 +6,13 @@
     "build": "react-router build",
     "dev": "react-router dev",
     "start": "react-router-serve ./build/server/index.js",
+    "test": "vitest run",
     "typecheck": "react-router typegen && tsc"
   },
   "dependencies": {
     "@react-router/node": "7.15.0",
     "@react-router/serve": "7.15.0",
+    "@testing-library/user-event": "^14.6.1",
     "isbot": "^5.1.36",
     "react": "^19.2.6",
     "react-dom": "^19.2.6",
@@ -19,11 +21,15 @@
   "devDependencies": {
     "@react-router/dev": "7.15.0",
     "@tailwindcss/vite": "^4.2.2",
+    "@testing-library/jest-dom": "^6.0.0",
+    "@testing-library/react": "^15.0.0",
     "@types/node": "^22",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "jsdom": "^24.0.0",
     "tailwindcss": "^4.2.2",
     "typescript": "^5.9.3",
-    "vite": "^8.0.3"
+    "vite": "^8.0.3",
+    "vitest": "^2.0.0"
   }
-}
+}