feat: Add CI/CD pipeline and code quality improvements

- Add GitHub Actions workflow for automated CI/CD
- Configure Node.js 18.x and 20.x matrix testing
- Add TypeScript type checking step
- Add ESLint code quality checks with enhanced rules
- Add Prettier formatting verification
- Add production build validation
- Upload build artifacts for deployment
- Set up automated testing on push/PR
- Replace console.log with environment-aware logger
- Add pre-commit hooks for code quality
- Exclude archive folder from linting

🤖 Generated with [Claude Code](https://claude.ai/code)

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

eslint.config.js

@@ -5,7 +5,18 @@ import reactRefresh from "eslint-plugin-react-refresh";
 import tseslint from "typescript-eslint";
 
 export default tseslint.config(
-  { ignores: ["dist"] },
+  {
+    ignores: [
+      "dist",
+      "android/**",
+      "ios/**", 
+      "capacitor/**",
+      "node_modules/**",
+      "*.config.js",
+      "*.config.ts",
+      "src/archive/**",
+    ],
+  },
   {
     extends: [js.configs.recommended, ...tseslint.configs.recommended],
     files: ["**/*.{ts,tsx}"],
@@ -23,7 +34,33 @@ export default tseslint.config(
         "warn",
         { allowConstantExport: true },
       ],
-      "@typescript-eslint/no-unused-vars": "off",
+      // TypeScript specific rules
+      "@typescript-eslint/no-unused-vars": [
+        "error",
+        {
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
+        },
+      ],
+      "@typescript-eslint/no-explicit-any": "warn",
+      "@typescript-eslint/no-inferrable-types": "error",
+
+      // General JavaScript rules
+      "no-console": ["warn", { allow: ["warn", "error"] }],
+      "no-debugger": "error",
+      "no-alert": "error",
+      "prefer-const": "error",
+      "no-var": "error",
+      eqeqeq: ["error", "always"],
+      curly: ["error", "all"],
+
+      // React specific rules
+      "react-hooks/exhaustive-deps": "error",
+
+      // Code quality rules (relaxed for migration period)
+      complexity: ["warn", 30],
+      "max-depth": ["warn", 6],
+      "max-lines-per-function": ["warn", 300],
     },
   }
 );