feat: comprehensive Biome linting fixes and code quality improvements

Major code quality overhaul addressing 58% of all linting issues:

• Type Safety Improvements:
  - Replace all any types with proper TypeScript interfaces
  - Fix Map component shadowing (renamed to CountryMap)
  - Add comprehensive custom error classes system
  - Enhance API route type safety

• Accessibility Enhancements:
  - Add explicit button types to all interactive elements
  - Implement useId() hooks for form element accessibility
  - Add SVG title attributes for screen readers
  - Fix static element interactions with keyboard handlers

• React Best Practices:
  - Resolve exhaustive dependencies warnings with useCallback
  - Extract nested component definitions to top level
  - Fix array index keys with proper unique identifiers
  - Improve component organization and prop typing

• Code Organization:
  - Automatic import organization and type import optimization
  - Fix unused function parameters and variables
  - Enhanced error handling with structured error responses
  - Improve component reusability and maintainability

Results: 248 → 104 total issues (58% reduction)
- Fixed all critical type safety and security issues
- Enhanced accessibility compliance significantly
- Improved code maintainability and performance

app/platform/page.tsx

@@ -1,7 +1,7 @@
 "use client";
 
-import { useEffect } from "react";
 import { useRouter } from "next/navigation";
+import { useEffect } from "react";
 
 export default function PlatformIndexPage() {
   const router = useRouter();
@@ -14,8 +14,10 @@ export default function PlatformIndexPage() {
   return (
     <div className="min-h-screen flex items-center justify-center">
       <div className="text-center">
-        <p className="text-muted-foreground">Redirecting to platform dashboard...</p>
+        <p className="text-muted-foreground">
+          Redirecting to platform dashboard...
+        </p>
       </div>
     </div>
   );
-}
+}