Fix condition picker clipping out of viewport

Render condition picker via React portal with fixed positioning so it
is no longer clipped by the overflow-y-auto combatant list container.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/__tests__/condition-picker.test.tsx

@@ -4,6 +4,7 @@ import "@testing-library/jest-dom/vitest";
 import { CONDITION_DEFINITIONS, type ConditionId } from "@initiative/domain";
 import { cleanup, render, screen } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
+import { createRef, type RefObject } from "react";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import { ConditionPicker } from "../condition-picker";
 
@@ -18,8 +19,13 @@ function renderPicker(
 ) {
 	const onToggle = overrides.onToggle ?? vi.fn();
 	const onClose = overrides.onClose ?? vi.fn();
+	const anchorRef = createRef<HTMLElement>() as RefObject<HTMLElement>;
+	const anchor = document.createElement("div");
+	document.body.appendChild(anchor);
+	(anchorRef as { current: HTMLElement }).current = anchor;
 	const result = render(
 		<ConditionPicker
+			anchorRef={anchorRef}
 			activeConditions={overrides.activeConditions ?? []}
 			onToggle={onToggle}
 			onClose={onClose}