fix: window controls, dragging, and text selection

- Add Tauri permissions for window minimize/maximize/close/drag
- Rewrite WindowControls with plain buttons + stopPropagation
  to prevent drag region from capturing button clicks
- Add data-tauri-drag-region to TopBar child containers
- Make OpenPylon text pointer-events-none and select-none

src/components/layout/TopBar.tsx

@@ -81,7 +81,7 @@ export function TopBar() {
       style={{ borderBottom: isBoardView && board ? `2px solid ${board.color}` : '1px solid var(--border)' }}
     >
       {/* Left section */}
-      <div className="flex items-center gap-2">
+      <div data-tauri-drag-region className="flex items-center gap-2">
         {isBoardView && (
           <Tooltip>
             <TooltipTrigger asChild>
@@ -104,7 +104,7 @@ export function TopBar() {
       </div>
 
       {/* Center section */}
-      <div className="flex flex-1 items-center justify-center">
+      <div data-tauri-drag-region className="flex flex-1 items-center justify-center select-none">
         {isBoardView && board ? (
           editing ? (
             <input
@@ -128,7 +128,7 @@ export function TopBar() {
             </button>
           )
         ) : (
-          <span className="font-heading text-lg text-pylon-text">
+          <span className="pointer-events-none font-heading text-lg text-pylon-text">
             OpenPylon
           </span>
         )}