refactor: migrate all icons from Untitled UI to FontAwesome Pro Duotone

Replace all @untitledui/icons imports across 55 files with equivalent
@fortawesome/pro-duotone-svg-icons icons, using FontAwesomeIcon wrappers
(FC<{ className?: string }>) for prop-based usage and inline replacements
for direct JSX usage. Drops unsupported Untitled UI-specific props
(strokeWidth, numeric size). TypeScript compiles clean with no errors.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/base/select/select-item.tsx

@@ -1,5 +1,6 @@
 import { isValidElement, useContext } from "react";
-import { Check } from "@untitledui/icons";
+import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
+import { faCheck } from "@fortawesome/pro-duotone-svg-icons";
 import type { ListBoxItemProps as AriaListBoxItemProps } from "react-aria-components";
 import { ListBoxItem as AriaListBoxItem, Text as AriaText } from "react-aria-components";
 import { Avatar } from "@/components/base/avatar/avatar";
@@ -79,11 +80,12 @@ export const SelectItem = ({ label, id, value, avatarUrl, supportingText, isDisa
                     </div>
 
                     {state.isSelected && (
-                        <Check
+                        <FontAwesomeIcon
+                            icon={faCheck}
                             aria-hidden="true"
                             className={cx(
                                 "ml-auto text-fg-brand-primary",
-                                size === "sm" ? "size-4 stroke-[2.5px]" : "size-5",
+                                size === "sm" ? "size-4" : "size-5",
                                 state.isDisabled && "text-fg-disabled",
                             )}
                         />