fix(ui): render TagInput dropdown via portal to avoid overflow clipping

- import createPortal from react-dom
- add dropdownStyle state to track fixed position coordinates
- calculate and update dropdown position on open, scroll, and resize
- render dropdown and empty-state divs into document.body using createPortal

src/shared/components/TagInput.js

@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useRef, useEffect } from 'react';
+import { createPortal } from 'react-dom';
 
 const hexToRgb = (hex) => {
   const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
@@ -53,6 +54,7 @@ const TagInput = ({
 }) => {
   const [inputValue, setInputValue] = useState('');
   const [isOpen, setIsOpen] = useState(false);
+  const [dropdownStyle, setDropdownStyle] = useState({});
   const containerRef = useRef(null);
   const inputRef = useRef(null);
 
@@ -72,6 +74,23 @@ const TagInput = ({
     return () => document.removeEventListener('mousedown', handleClickOutside);
   }, []);
 
+  useEffect(() => {
+    if (!isOpen || !containerRef.current) return;
+    const updatePosition = () => {
+      const rect = containerRef.current?.getBoundingClientRect();
+      if (rect) {
+        setDropdownStyle({ top: rect.bottom + 6, left: rect.left, width: rect.width });
+      }
+    };
+    updatePosition();
+    window.addEventListener('scroll', updatePosition, true);
+    window.addEventListener('resize', updatePosition);
+    return () => {
+      window.removeEventListener('scroll', updatePosition, true);
+      window.removeEventListener('resize', updatePosition);
+    };
+  }, [isOpen]);
+
   const selectOption = (option) => {
     onChange([...value, option.value]);
     setInputValue('');
@@ -124,8 +143,8 @@ const TagInput = ({
           className="flex-1 min-w-[80px] bg-transparent outline-none text-neutral-900 dark:text-white placeholder-neutral-400 dark:placeholder-neutral-500 text-sm"
         />
 
-        {isOpen && filtered.length > 0 && (
-          <div className="absolute top-full left-0 right-0 mt-1.5 z-50 bg-white dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-xl shadow-lg overflow-hidden max-h-56 overflow-y-auto">
+        {isOpen && filtered.length > 0 && createPortal(
+          <div className="z-[9999] bg-white dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-xl shadow-lg overflow-hidden max-h-56 overflow-y-auto" style={{ position: 'fixed', ...dropdownStyle }}>
             {filtered.map(option => (
               <button
                 key={option.value}
@@ -145,13 +164,15 @@ const TagInput = ({
                 )}
               </button>
             ))}
-          </div>
+          </div>,
+          document.body
         )}
 
-        {isOpen && filtered.length === 0 && inputValue && (
-          <div className="absolute top-full left-0 right-0 mt-1.5 z-50 bg-white dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-xl shadow-lg overflow-hidden">
+        {isOpen && filtered.length === 0 && inputValue && createPortal(
+          <div className="z-[9999] bg-white dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-xl shadow-lg overflow-hidden" style={{ position: 'fixed', ...dropdownStyle }}>
             <p className="px-3 py-2.5 text-sm text-neutral-400 dark:text-neutral-500">Aucun résultat</p>
-          </div>
+          </div>,
+          document.body
         )}
       </div>