fix: Docker build - use npm install and exclude test files from tsconfig

- Replace npm ci with npm install to handle package-lock.json sync issues
- Exclude test files from tsconfig.json to prevent type errors during build

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

Author: Seaual

Dockerfile

@@ -9,7 +9,7 @@ WORKDIR /app/frontend
 COPY frontend/package*.json ./
 
 # Install dependencies
-RUN npm ci
+RUN npm install
 
 # Copy frontend source
 COPY frontend/ ./

frontend/tsconfig.json

@@ -17,5 +17,6 @@
     "noFallthroughCasesInSwitch": true
   },
   "include": ["src"],
+  "exclude": ["src/**/*.test.*", "src/**/*.spec.*", "vitest.setup.ts", "vitest.config.ts"],
   "references": [{ "path": "./tsconfig.node.json" }]
 }