Fix dropdown layering with fixed positioning

Replace absolute positioning with fixed positioning to break out of
stacking contexts created by glass morphism effects.

Changes:
- Use fixed positioning with calculated coordinates
- Track button position with getBoundingClientRect()
- Update click outside detection to include button reference
- Ensure dropdown appears above all other elements

This should resolve the issue where dropdowns appear behind other containers.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/Dropdown.tsx

@@ -20,12 +20,15 @@ export default function Dropdown({
   onToggle,
 }: DropdownProps) {
   const dropdownRef = useRef<HTMLDivElement>(null);
+  const buttonRef = useRef<HTMLButtonElement>(null);
   const [isOpen, setIsOpen] = useState(controlledIsOpen ?? false);
+  const [dropdownPosition, setDropdownPosition] = useState({ top: 0, left: 0, width: 0 });
 
   useEffect(() => {
     const handleClickOutside = (event: MouseEvent) => {
       if (!dropdownRef.current || !(event.target instanceof Node)) return;
-      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target) && 
+          buttonRef.current && !buttonRef.current.contains(event.target)) {
         if (onToggle) onToggle(false);
         else setIsOpen(false);
       }
@@ -40,6 +43,17 @@ export default function Dropdown({
     };
   }, [controlledIsOpen, isOpen, onToggle]);
 
+  useEffect(() => {
+    if ((controlledIsOpen ?? isOpen) && buttonRef.current) {
+      const rect = buttonRef.current.getBoundingClientRect();
+      setDropdownPosition({
+        top: rect.bottom + window.scrollY,
+        left: rect.left + window.scrollX,
+        width: rect.width
+      });
+    }
+  }, [controlledIsOpen, isOpen]);
+
   const activeOption = options.find((option) => option.id === activeId) || null;
 
   const handleSelect = (option: { id: number }) => {
@@ -54,33 +68,44 @@ export default function Dropdown({
   };
 
   return (
-    <div className="relative w-full" ref={dropdownRef}>
-      <button
-        type="button"
-        onClick={toggleDropdown}
-        className="dropdown-button"
-      >
-        <span>
-          {activeOption ? activeOption.name : label}
-        </span>
-        <svg
-          className={`icon-sm transition-transform duration-200 ${(controlledIsOpen ?? isOpen) ? 'rotate-180' : ''}`}
-          fill="currentColor"
-          viewBox="0 0 20 20"
+    <>
+      <div className="relative w-full">
+        <button
+          ref={buttonRef}
+          type="button"
+          onClick={toggleDropdown}
+          className="dropdown-button"
         >
-          <path
-            fillRule="evenodd"
-            d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a 1 1 0 01-1.414 0l-4-4a 1 1 0 010-1.414z"
-            clipRule="evenodd"
-          />
-        </svg>
-      </button>
+          <span>
+            {activeOption ? activeOption.name : label}
+          </span>
+          <svg
+            className={`icon-sm transition-transform duration-200 ${(controlledIsOpen ?? isOpen) ? 'rotate-180' : ''}`}
+            fill="currentColor"
+            viewBox="0 0 20 20"
+          >
+            <path
+              fillRule="evenodd"
+              d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a 1 1 0 01-1.414 0l-4-4a 1 1 0 010-1.414z"
+              clipRule="evenodd"
+            />
+          </svg>
+        </button>
+      </div>
 
       {(controlledIsOpen ?? isOpen) && (
-        <div className="absolute z-[9999] w-full dropdown-menu">
+        <div 
+          ref={dropdownRef}
+          className="fixed z-[9999] dropdown-menu"
+          style={{
+            top: dropdownPosition.top,
+            left: dropdownPosition.left,
+            width: dropdownPosition.width
+          }}
+        >
           {options.length === 0 ? (
             <div className="dropdown-item text-center">
-              No streams available
+              No teams available
             </div>
           ) : (
             options.map((option) => (
@@ -95,6 +120,6 @@ export default function Dropdown({
           )}
         </div>
       )}
-    </div>
+    </>
   );
 }