fix(electrobun): remove all -webkit-app-region, use JS window drag on AGOR title

ui-electrobun/src/bun/index.ts

@@ -308,6 +308,15 @@ const rpc = BrowserView.defineRPC<PtyRPCSchema>({
         }
       },
 
+      "window.setPosition": ({ x, y }: { x: number; y: number }) => {
+        try {
+          mainWindow.setPosition(x, y);
+          return { ok: true };
+        } catch {
+          return { ok: false };
+        }
+      },
+
       // ── Keybinding handlers ──────────────────────────────────────────────
 
       "keybindings.getAll": () => {