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

components/magicui/pointer.tsx

@@ -1,13 +1,13 @@
 "use client";
 
-import { cn } from "@/lib/utils";
 import {
   AnimatePresence,
-  HTMLMotionProps,
+  type HTMLMotionProps,
   motion,
   useMotionValue,
 } from "motion/react";
 import { useEffect, useRef, useState } from "react";
+import { cn } from "@/lib/utils";
 
 interface PointerProps extends Omit<HTMLMotionProps<"div">, "ref"> {
   children?: React.ReactNode;
@@ -109,6 +109,7 @@ export function Pointer({
                   className
                 )}
               >
+                <title>Mouse pointer</title>
                 <path d="M14.082 2.182a.5.5 0 0 1 .103.557L8.528 15.467a.5.5 0 0 1-.917-.007L5.57 10.694.803 8.652a.5.5 0 0 1-.006-.916l12.728-5.657a.5.5 0 0 1 .556.103z" />
               </svg>
             )}