Import source: src/components/TitleBar

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

src/components/TitleBar.tsx

@@ -0,0 +1,66 @@
+import { useEffect, useState } from "react";
+import { getCurrentWindow } from "@tauri-apps/api/window";
+import { Minus, Square, Copy, X } from "lucide-react";
+
+const appWindow = getCurrentWindow();
+
+/**
+ * Custom Windows title bar (window has decorations: false).
+ * Height 40px; the drag region spans everything except the buttons.
+ */
+export default function TitleBar() {
+  const [maximized, setMaximized] = useState(false);
+
+  useEffect(() => {
+    appWindow.isMaximized().then(setMaximized);
+    const unlisten = appWindow.onResized(async () => {
+      setMaximized(await appWindow.isMaximized());
+    });
+    return () => {
+      unlisten.then((f) => f());
+    };
+  }, []);
+
+  return (
+    <div
+      data-tauri-drag-region
+      className="flex h-10 shrink-0 items-center justify-between border-b border-divider bg-bg"
+    >
+      <div data-tauri-drag-region className="flex items-center gap-2 pl-3">
+        <span
+          data-tauri-drag-region
+          className="text-[13px] font-medium text-text-secondary"
+        >
+          Notara
+        </span>
+      </div>
+      <div className="flex h-full">
+        <button
+          aria-label="Minimize"
+          onClick={() => appWindow.minimize()}
+          className="flex h-full w-12 items-center justify-center text-text-secondary hover:bg-bg-hover"
+        >
+          <Minus size={16} strokeWidth={1.5} />
+        </button>
+        <button
+          aria-label={maximized ? "Restore" : "Maximize"}
+          onClick={() => appWindow.toggleMaximize()}
+          className="flex h-full w-12 items-center justify-center text-text-secondary hover:bg-bg-hover"
+        >
+          {maximized ? (
+            <Copy size={14} strokeWidth={1.5} className="-scale-x-100" />
+          ) : (
+            <Square size={13} strokeWidth={1.5} />
+          )}
+        </button>
+        <button
+          aria-label="Close"
+          onClick={() => appWindow.close()}
+          className="flex h-full w-12 items-center justify-center text-text-secondary hover:bg-[#e81123] hover:text-white"
+        >
+          <X size={16} strokeWidth={1.5} />
+        </button>
+      </div>
+    </div>
+  );
+}