app: make draft screen unhandled areas draggable in Tauri

packages/app/src/screens/agent/draft-agent-screen.tsx

@@ -49,6 +49,7 @@ import type {
 } from '@server/server/agent/agent-sdk-types'
 import { AGENT_PROVIDER_DEFINITIONS } from '@server/server/agent/provider-manifest'
 import { buildHostAgentDetailRoute } from '@/utils/host-routes'
+import { useTauriDragHandlers } from '@/utils/tauri-window'
 
 const DRAFT_AGENT_ID = '__new_agent__'
 const EMPTY_PENDING_PERMISSIONS = new Map()
@@ -237,6 +238,7 @@ function DraftAgentScreenContent({
   const activateExplorerTabForCheckout = usePanelStore(
     (state) => state.activateExplorerTabForCheckout
   )
+  const tauriDragHandlers = useTauriDragHandlers()
   const isExplorerOpen = isMobile ? mobileView === 'file-explorer' : desktopFileExplorerOpen
 
   const [worktreeMode, setWorktreeMode] = useState<'none' | 'create' | 'attach'>('none')
@@ -1112,7 +1114,7 @@ function DraftAgentScreenContent({
   const explorerServerId = draftExplorerCheckout?.serverId ?? null
   const explorerIsGit = draftExplorerCheckout?.isGit ?? false
   const mainContent = (
-    <View style={styles.container}>
+    <View style={styles.container} {...tauriDragHandlers}>
       <View style={styles.outerContainer}>
         <View style={styles.agentPanel}>
           <View

packages/app/src/utils/tauri-window.ts

@@ -4,6 +4,18 @@ import { getIsTauriMac, TAURI_TRAFFIC_LIGHT_WIDTH, TAURI_TRAFFIC_LIGHT_HEIGHT }
 import { getCurrentTauriWindow, getTauri, isTauriEnvironment } from "@/utils/tauri";
 
 let tauriWindow: any = null;
+const NON_DRAGGABLE_SELECTOR = [
+  "button",
+  "a",
+  "input",
+  "textarea",
+  "select",
+  "[role='button']",
+  "[role='link']",
+  "[role='textbox']",
+  "[role='combobox']",
+  "[contenteditable='true']",
+].join(", ");
 
 async function getTauriWindow() {
   if (tauriWindow) return tauriWindow;
@@ -82,9 +94,10 @@ export function useTauriDragHandlers() {
     onMouseDown: (e: React.MouseEvent) => {
       // Only handle primary button, ignore if clicking on interactive elements.
       // Tauri docs recommend using `e.detail` on mousedown for double-click maximize.
+      if (e.defaultPrevented) return;
       if (typeof e.buttons === "number" ? e.buttons !== 1 : e.button !== 0) return;
-      const target = e.target as HTMLElement;
+      const target = e.target instanceof Element ? e.target : null;
-      if (target.closest("button, a, input, [role='button']")) return;
+      if (target?.closest(NON_DRAGGABLE_SELECTOR)) return;
 
       // Prevent text selection when dragging
       e.preventDefault();