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/api/dashboard/sessions/route.ts

@@ -1,13 +1,9 @@
-import { NextRequest, NextResponse } from "next/server";
+import type { Prisma } from "@prisma/client";
+import { type NextRequest, NextResponse } from "next/server";
 import { getServerSession } from "next-auth/next";
 import { authOptions } from "../../../../lib/auth";
 import { prisma } from "../../../../lib/prisma";
-import {
-  ChatSession,
-  SessionApiResponse,
-  SessionQuery,
-} from "../../../../lib/types";
-import { Prisma } from "@prisma/client";
+import type { ChatSession } from "../../../../lib/types";
 
 export async function GET(request: NextRequest) {
   const authSession = await getServerSession(authOptions);
@@ -48,7 +44,7 @@ export async function GET(request: NextRequest) {
     // Category Filter
     if (category && category.trim() !== "") {
       // Cast to SessionCategory enum if it's a valid value
-      whereClause.category = category as any;
+      whereClause.category = category;
     }
 
     // Language Filter