后台单页和公告改为正文优先编辑，保存与发布分开。

列表按列对照真实路径和状态，避免把 /p/ 前缀和发布操作混在一起。

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

frontend/components/MarkdownEditor.tsx

@@ -145,6 +145,36 @@ export default function MarkdownEditor({
     null
   );
   const savedSel = useRef<{ start: number; end: number } | null>(null);
+  const fullscreenMounted = useRef(false);
+
+  const rememberCaret = () => {
+    const el = taRef.current;
+    if (!el) return;
+    savedSel.current = { start: el.selectionStart, end: el.selectionEnd };
+  };
+
+  const toggleFullscreen = () => {
+    rememberCaret();
+    setFullscreen((v) => !v);
+  };
+
+  useEffect(() => {
+    if (!fullscreenMounted.current) {
+      fullscreenMounted.current = true;
+      return;
+    }
+    if (mode !== "write") return;
+    const sel = savedSel.current;
+    const el = taRef.current;
+    if (!el || !sel) return;
+    // 进出全屏后把焦点和光标放回退出前的位置
+    const frame = requestAnimationFrame(() => {
+      el.focus();
+      const max = el.value.length;
+      el.setSelectionRange(Math.min(sel.start, max), Math.min(sel.end, max));
+    });
+    return () => cancelAnimationFrame(frame);
+  }, [fullscreen]);
 
   useEffect(() => {
     if (!fullscreen) return;
@@ -152,7 +182,10 @@ export default function MarkdownEditor({
       if (e.key === "Escape") {
         e.preventDefault();
         if (popover) setPopover(null);
-        else setFullscreen(false);
+        else {
+          rememberCaret();
+          setFullscreen(false);
+        }
       }
     };
     const prev = document.body.style.overflow;
@@ -452,6 +485,8 @@ export default function MarkdownEditor({
 
   const onTextareaKeyDown = (e: ReactKeyboardEvent<HTMLTextAreaElement>) => {
     if ((e.ctrlKey || e.metaKey) && e.key === "Enter") {
+      // 输入法组字期间的 Enter 不是提交
+      if (e.nativeEvent.isComposing || e.nativeEvent.keyCode === 229) return;
       e.preventDefault();
       onSubmitShortcut?.();
       return;
@@ -954,7 +989,8 @@ export default function MarkdownEditor({
             className="j13-md-tool"
             data-tip={fullscreen ? "退出全屏 (Esc)" : "全屏写作"}
             aria-label={fullscreen ? "退出全屏" : "全屏写作"}
-            onClick={() => setFullscreen((v) => !v)}
+            onMouseDown={(e) => e.preventDefault()}
+            onClick={toggleFullscreen}
           >
             {fullscreen ? <Minimize2 size={15} /> : <Maximize2 size={15} />}
           </button>