feat: 站点单页、时间线导入与行级 BBCode 短代码

首页右栏接入单页入口与公告置顶/全部页；Markdown 编辑器支持可视化时间线与 Git 导入；隐藏块改为 [hide]/[timeline] 命名闭合，并修复单页/公告 GORM 更新只改 updated_at 的问题。

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

frontend/lib/hideBlocks.ts

@@ -1,4 +1,4 @@
-/** 正文 :::hide 块解析（与 backend/markdown/hide.go 契约一致） */
+/** 正文 [hide]…[/hide] 块解析（与 backend/markdown/hide.go 契约一致） */
 
 export type HideKind = "login" | "reply" | "points" | "password";
 
@@ -13,25 +13,34 @@ export type HideSegment =
     };
 
 const HIDE_KINDS = new Set<HideKind>(["login", "reply", "points", "password"]);
+const HIDE_OPEN_RE = /^\[hide(?:\s+(.+))?\]$/i;
 
 function isClose(line: string): boolean {
-  return line.trim() === ":::";
+  return line.trim().toLowerCase() === "[/hide]";
 }
 
-/** 与 Go parseOpenMarker 对齐：:::hide <kind> [points|password] [locked] */
+/** 与 Go parseOpenMarker 对齐：[hide <kind>[=arg] [locked]] */
 function parseOpen(trimmed: string): {
   kind: HideKind;
   points: number;
   locked: boolean;
 } | null {
-  if (!trimmed.startsWith(":::hide")) return null;
-  const parts = trimmed
-    .slice(":::hide".length)
-    .trim()
-    .split(/\s+/)
-    .filter(Boolean);
+  const m = trimmed.match(HIDE_OPEN_RE);
+  if (!m) return null;
+  const rest = (m[1] || "").trim();
+  if (!rest) return null;
+  const parts = rest.split(/\s+/).filter(Boolean);
   if (parts.length === 0) return null;
-  const kind = parts[0] as HideKind;
+
+  let head = parts[0];
+  let kind = head;
+  let arg = "";
+  const eq = head.indexOf("=");
+  if (eq >= 0) {
+    kind = head.slice(0, eq);
+    arg = head.slice(eq + 1);
+  }
+  kind = kind.toLowerCase() as HideKind;
   if (!HIDE_KINDS.has(kind)) return null;
 
   let idx = 1;
@@ -39,20 +48,21 @@ function parseOpen(trimmed: string): {
   let locked = false;
 
   if (kind === "points") {
-    if (idx >= parts.length) return null;
-    const n = Number(parts[idx]);
+    if (!arg) return null;
+    const n = Number(arg);
     if (!Number.isFinite(n) || n < 1 || n > 100000) return null;
     points = n;
-    idx++;
   } else if (kind === "password") {
-    // 脱敏：:::hide password locked；原文：:::hide password <pwd> [locked]
-    if (idx < parts.length && parts[idx] !== "locked") {
-      idx++;
+    // 脱敏：[hide password locked]；原文密码不在前端解析保留
+    if (arg) {
+      /* skip plaintext */
     }
+  } else if (arg) {
+    return null;
   }
 
   for (; idx < parts.length; idx++) {
-    if (parts[idx] === "locked") locked = true;
+    if (parts[idx].toLowerCase() === "locked") locked = true;
     else return null;
   }
   return { kind, points, locked };