fix: allow closing last session tab and restore DevTools shortcut

Closing the sole remaining non-welcome tab now resets to welcome; enable Tauri devtools, menu/shortcut toggle, and copy release artifacts from CARGO_TARGET_DIR.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/hooks/useKeyboardShortcuts.ts

@@ -213,6 +213,15 @@ export function useKeyboardShortcuts(): void {
         return
       }
 
+      // ---- Cmd+Option+I / F12: 开发者工具（输入框内也可用）----
+      if ((ctrlOrMeta && e.altKey && !e.shiftKey && e.key.toLowerCase() === 'i') || e.key === 'F12') {
+        e.preventDefault()
+        void window.opsxApi?.toggleDevtools?.().catch(() => {
+          logger.warn('Failed to toggle developer tools')
+        })
+        return
+      }
+
       // ---- 以下快捷键在输入框中不触发 (除非 fireInInput=true) ----
       if (isInputElement(e) && !shouldFireInInput(e)) {
         return
@@ -222,7 +231,8 @@ export function useKeyboardShortcuts(): void {
       if (matchesKeySequence(e, keys[KeybindingAction.TAB_CLOSE])) {
         e.preventDefault()
         const { tabs, activeTabId } = useTabStore.getState()
-        if (activeTabId && tabs.length > 1) {
+        const active = tabs.find((tab) => tab.id === activeTabId)
+        if (activeTabId && (tabs.length > 1 || active?.type !== 'welcome')) {
           logger.debug('Ctrl+W: closing tab', activeTabId)
           void disposeAndCloseTab(activeTabId)
         }