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/animated-beam.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { motion } from "motion/react";
-import { RefObject, useEffect, useId, useState } from "react";
+import { type RefObject, useEffect, useId, useState } from "react";
 
 import { cn } from "@/lib/utils";
 
@@ -94,7 +94,7 @@ export const AnimatedBeam: React.FC<AnimatedBeamProps> = ({
     // Initialize ResizeObserver
     const resizeObserver = new ResizeObserver((entries) => {
       // For all entries, recalculate the path
-      for (const entry of entries) {
+      for (const _entry of entries) {
         updatePath();
       }
     });
@@ -134,6 +134,7 @@ export const AnimatedBeam: React.FC<AnimatedBeamProps> = ({
       )}
       viewBox={`0 0 ${svgDimensions.width} ${svgDimensions.height}`}
     >
+      <title>Animated connection beam</title>
       <path
         d={pathD}
         stroke={pathColor}