Add tooltip preview on hover for notes in Pricing tab

Show note content in popup when hovering over the notes icon

src/components/PricingView.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useMemo, useRef, useCallback } from 'react';
+import React, { useState, useMemo, useRef, useCallback, useEffect } from 'react';
 import { ExcelRow, COLUMNS } from '../types';
 import {
   AlertTriangle,
@@ -925,6 +925,7 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                           onChange={(e) => handleToggleCheck(dataIndex, e.target.checked)}
                           className="w-4 h-4 rounded border-slate-600 bg-slate-900 text-blue-600 focus:ring-blue-500 focus:ring-offset-slate-800 cursor-pointer"
                         />
+                        <div className="relative group">
                           <button
                             onClick={() => setNoteEditor({ rowIndex: dataIndex, text: note })}
                             className={cn(
@@ -933,10 +934,15 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                                 ? "bg-amber-500/10 text-amber-400 border border-amber-500/20 hover:bg-amber-500/20" 
                                 : "text-slate-500 hover:text-slate-300 hover:bg-slate-700/50"
                             )}
-                          title={note || "Add note"}
                           >
                             <MessageSquare className={cn("w-3.5 h-3.5", note && "fill-amber-400/20")} />
                           </button>
+                          {note && (
+                            <div className="absolute bottom-full left-1/2 -translate-x-1/2 mb-2 w-48 p-2 bg-amber-900/90 border border-amber-500/50 rounded text-xs text-white shadow-lg z-50 opacity-0 group-hover:opacity-100 transition-opacity pointer-events-none">
+                              {note}
+                            </div>
+                          )}
+                        </div>
                       </div>
                     </td>