refactor(A2): extract MobileLayout component

client/src/components/features/mobile-layout.tsx

@@ -0,0 +1,161 @@
+import React from "react";
+import ReactDOM from "react-dom";
+import { Button } from "@/components/ui/button";
+import { Cpu, Wrench, Terminal, Monitor } from "lucide-react";
+import clsx from "clsx";
+
+export type MobilePanel = "code" | "compile" | "serial" | "board" | null;
+
+export interface MobileLayoutProps {
+  isMobile: boolean;
+  mobilePanel: MobilePanel;
+  setMobilePanel: React.Dispatch<React.SetStateAction<MobilePanel>>;
+  headerHeight: number;
+  overlayZ: number;
+
+  // slots
+  codeSlot?: React.ReactNode;
+  compileSlot?: React.ReactNode;
+  serialSlot?: React.ReactNode;
+  boardSlot?: React.ReactNode;
+
+  portalContainer?: HTMLElement | null;
+  className?: string;
+  testId?: string;
+  onOpenPanel?: (panel: MobilePanel) => void;
+  onClosePanel?: () => void;
+}
+
+export const MobileLayout = React.memo(function MobileLayout({
+  isMobile,
+  mobilePanel,
+  setMobilePanel,
+  headerHeight,
+  overlayZ,
+  codeSlot,
+  compileSlot,
+  serialSlot,
+  boardSlot,
+  portalContainer = typeof document !== "undefined" ? document.body : null,
+  className,
+  testId = "mobile-layout",
+  onOpenPanel,
+  onClosePanel,
+}: MobileLayoutProps) {
+  // helpers
+  const handleToggle = React.useCallback(
+    (panel: MobilePanel) => {
+      setMobilePanel((prev: MobilePanel) => (prev === panel ? null : panel));
+      if (panel === mobilePanel) {
+        onClosePanel?.();
+      } else {
+        onOpenPanel?.(panel);
+      }
+    },
+    [mobilePanel, setMobilePanel, onOpenPanel, onClosePanel],
+  );
+
+  // render fab bar via portal
+  const fabBar = (
+    <div
+      className="fixed inset-0 pointer-events-none"
+      style={{ zIndex: overlayZ }}
+      data-testid="mobile-fab-container"
+    >
+      <div
+        className="absolute inset-0 flex items-end justify-end p-8"
+        style={{
+          paddingBottom: "env(safe-area-inset-bottom, 32px)",
+          paddingRight: "env(safe-area-inset-right, 32px)",
+        }}
+      >
+        <div className="pointer-events-auto sticky mr-4 mb-4" style={{ alignSelf: "flex-end" }}>
+          <div className="bg-black/95 rounded-full shadow-lg p-1 flex flex-col items-center space-y-2">
+            <Button
+              variant="ghost"
+              size="icon"
+              aria-label="Code Editor"
+              onClick={() => handleToggle("code")}
+              className={clsx(
+                "w-[var(--ui-button-height)] h-[var(--ui-button-height)] rounded-full",
+                mobilePanel === "code"
+                  ? "bg-blue-600 text-white hover:bg-blue-700"
+                  : "bg-transparent text-muted-foreground",
+              )}
+            >
+              <Cpu className="w-5 h-5" />
+            </Button>
+            <Button
+              variant="ghost"
+              size="icon"
+              aria-label="Compilation Output"
+              onClick={() => handleToggle("compile")}
+              className={clsx(
+                "w-[var(--ui-button-height)] h-[var(--ui-button-height)] rounded-full",
+                mobilePanel === "compile"
+                  ? "bg-green-600 text-white hover:bg-green-700"
+                  : "bg-transparent text-muted-foreground",
+              )}
+            >
+              <Wrench className="w-5 h-5 opacity-80" />
+            </Button>
+            <Button
+              variant="ghost"
+              size="icon"
+              aria-label="Serial Output"
+              onClick={() => handleToggle("serial")}
+              className={clsx(
+                "w-[var(--ui-button-height)] h-[var(--ui-button-height)] rounded-full",
+                mobilePanel === "serial"
+                  ? "bg-amber-600 text-white hover:bg-amber-700"
+                  : "bg-transparent text-muted-foreground",
+              )}
+            >
+              <Terminal className="w-5 h-5" />
+            </Button>
+            <Button
+              variant="ghost"
+              size="icon"
+              aria-label="Arduino Board"
+              onClick={() => handleToggle("board")}
+              className={clsx(
+                "w-[var(--ui-button-height)] h-[var(--ui-button-height)] rounded-full",
+                mobilePanel === "board"
+                  ? "bg-sky-600 text-white hover:bg-sky-700"
+                  : "bg-transparent text-muted-foreground",
+              )}
+            >
+              <Monitor className="w-5 h-5" />
+            </Button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+
+  return (
+    <>
+      {isMobile && portalContainer && ReactDOM.createPortal(fabBar, portalContainer)}
+      {mobilePanel && (
+        <div
+          className={clsx("fixed left-0 right-0 bottom-0 bg-card p-0 flex flex-col w-screen", className)}
+          style={{
+            top: `${headerHeight}px`,
+            height: `calc(100vh - ${headerHeight}px)`,
+            zIndex: overlayZ,
+          }}
+          data-testid={testId}
+        >
+          <div className="flex-1 overflow-auto w-screen h-full">
+            {mobilePanel === "code" && codeSlot}
+            {mobilePanel === "compile" && compileSlot}
+            {mobilePanel === "serial" && serialSlot}
+            {mobilePanel === "board" && boardSlot}
+          </div>
+        </div>
+      )}
+    </>
+  );
+});
+
+MobileLayout.displayName = "MobileLayout";