fix(mindspace): lower page access password minimum to 6 characters

Align publication validation, portal gate HTML, H5 publish UI, MCP docs,
and page-data skill guidance so passwords like 888888 are accepted while
3-character values such as 888 remain rejected.

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

mindspace-publications.mjs

@@ -78,11 +78,20 @@ function normalizeAccessMode(value) {
   return mode;
 }
 
+export const PAGE_ACCESS_PASSWORD_MIN_LENGTH = 6;
+export const PAGE_ACCESS_PASSWORD_MAX_LENGTH = 128;
+
 function normalizePassword(value, required) {
   const password = String(value ?? '');
   if (!required && !password) return null;
-  if (password.length < 8 || password.length > 128) {
-    throw publicationError('访问密码长度必须为 8 到 128 个字符', 'invalid_publish_input');
+  if (
+    password.length < PAGE_ACCESS_PASSWORD_MIN_LENGTH
+    || password.length > PAGE_ACCESS_PASSWORD_MAX_LENGTH
+  ) {
+    throw publicationError(
+      `访问密码长度必须为 ${PAGE_ACCESS_PASSWORD_MIN_LENGTH} 到 ${PAGE_ACCESS_PASSWORD_MAX_LENGTH} 个字符`,
+      'invalid_publish_input',
+    );
   }
   return password;
 }
@@ -1083,7 +1092,7 @@ export function createPublicationService(pool, options = {}) {
         } else if (publication.password_hash) {
           passwordHash = publication.password_hash;
         } else {
-          throw publicationError('访问密码长度必须为 8 到 128 个字符', 'invalid_publish_input');
+          throw publicationError('口令访问模式必须提供访问密码', 'invalid_publish_input');
         }
       }
       const now = Date.now();
@@ -1498,6 +1507,8 @@ async function registerPublicationArtifactForConversation({
 }
 
 export const publicationInternals = {
+  PAGE_ACCESS_PASSWORD_MIN_LENGTH,
+  PAGE_ACCESS_PASSWORD_MAX_LENGTH,
   normalizeSlug,
   normalizeAccessMode,
   normalizePassword,