feat: add knip configuration file and integrate knip for linting; update package.json and package-lock.json for new dependencies; refactor various interfaces to remove export modifiers; delete unused hover-card component

src/renderer/hooks/useAIChat.ts

@@ -1,7 +1,7 @@
 import { useState, useCallback, useRef } from 'react';
 import { trpc } from '@/lib/trpc';
 
-export interface ChatMessage {
+interface ChatMessage {
   id: string;
   role: 'user' | 'assistant';
   content: string;
@@ -14,7 +14,7 @@ export interface ChatContext {
   uiContext?: string;
 }
 
-export interface UseAIChatReturn {
+interface UseAIChatReturn {
   messages: ChatMessage[];
   input: string;
   setInput: (v: string) => void;
@@ -24,7 +24,7 @@ export interface UseAIChatReturn {
   clearMessages: () => void;
 }
 
-export interface UseAIChatOptions {
+interface UseAIChatOptions {
   onSectionTag?: (sectionId: string) => void;
 }