UI: каналы 1..32, публичный type=1 и актуальный prevLine перед записью

shine-UI/js/services/auth-service.js

@@ -791,14 +791,21 @@ export class AuthService {
     if (!cleanLogin) throw new Error('Missing login for AddBlock');
     if (!storagePwd) throw new Error('Missing storagePwd for AddBlock signing');
 
-    const user = await this.getUser(cleanLogin);
-    const blockchainName = String(user?.blockchainName || `${cleanLogin}-${BCH_SUFFIX}`).trim();
-    const freshNum = Number(user?.serverLastGlobalNumber);
-    const freshHash = normalizeHex32(user?.serverLastGlobalHash, ZERO64);
-    const freshCursor = {
-      serverLastGlobalNumber: Number.isFinite(freshNum) ? freshNum : -1,
-      serverLastGlobalHash: freshHash,
+    const resolveFreshCursor = async () => {
+      const user = await this.getUser(cleanLogin);
+      const blockchainName = String(user?.blockchainName || `${cleanLogin}-${BCH_SUFFIX}`).trim();
+      const freshNum = Number(user?.serverLastGlobalNumber);
+      const freshHash = normalizeHex32(user?.serverLastGlobalHash, ZERO64);
+      return {
+        blockchainName,
+        cursor: {
+          serverLastGlobalNumber: Number.isFinite(freshNum) ? freshNum : -1,
+          serverLastGlobalHash: freshHash,
+        },
+      };
     };
+    const freshState = await resolveFreshCursor();
+    const blockchainName = freshState.blockchainName;
 
     const savedKeys = await loadEncryptedUserSecrets(cleanLogin, storagePwd);
     const blockchainPrivatePkcs8 = savedKeys?.blockchainKey;
@@ -832,7 +839,7 @@ export class AuthService {
       });
     };
 
-    let cursor = freshCursor;
+    let cursor = freshState.cursor;
     let response = await tryAdd(cursor);
     if (response.status !== 200) {
       const knownNum = Number(response?.payload?.serverLastGlobalNumber);
@@ -840,6 +847,10 @@ export class AuthService {
       if (Number.isFinite(knownNum) && /^[0-9a-fA-F]{64}$/.test(knownHash)) {
         cursor = { serverLastGlobalNumber: knownNum, serverLastGlobalHash: knownHash.toLowerCase() };
         response = await tryAdd(cursor);
+      } else {
+        const refreshed = await resolveFreshCursor();
+        cursor = refreshed.cursor;
+        response = await tryAdd(cursor);
       }
     }
 
@@ -1211,11 +1222,32 @@ export class AuthService {
         rootHashHex = normalizeHex32(rootChannel.rootBlockHash, ZERO64);
       }
 
+      let prevLineNumber = lineCode;
+      let prevLineHashHex = rootHashHex;
+      let thisLineNumber = 0;
+      try {
+        const latestPayload = await this.getChannelMessages({
+          ownerBlockchainName,
+          channelRootBlockNumber: lineCode,
+          channelRootBlockHash: rootHashHex,
+        }, 1, 'desc', cleanLogin);
+        const latestMessage = Array.isArray(latestPayload?.messages) ? latestPayload.messages[0] : null;
+        const latestBlockNumber = Number(latestMessage?.messageRef?.blockNumber);
+        const latestBlockHash = normalizeHex32(latestMessage?.messageRef?.blockHash, '');
+        if (Number.isFinite(latestBlockNumber) && latestBlockNumber >= 0 && latestBlockHash) {
+          prevLineNumber = latestBlockNumber;
+          prevLineHashHex = latestBlockHash;
+          thisLineNumber = latestBlockNumber + 1;
+        }
+      } catch {
+        // fallback to root anchor
+      }
+
       const bodyBytes = makeTextPostBodyBytes({
         lineCode,
-        prevLineNumber: lineCode,
-        prevLineHashHex: rootHashHex,
-        thisLineNumber: 0,
+        prevLineNumber,
+        prevLineHashHex,
+        thisLineNumber,
         text: cleanText,
       });
 

shine-UI/js/services/channel-name-rules.js

@@ -1,4 +1,4 @@
-const MIN_LEN = 3;
+const MIN_LEN = 1;
 const MAX_LEN = 32;
 const ALLOWED_CHARS_RE = /^[A-Za-z0-9_-]+$/;
 
@@ -54,7 +54,7 @@ export function channelNameErrorText(code) {
     case 'blank':
       return 'Введите название канала.';
     case 'too_short':
-      return 'Название слишком короткое: минимум 3 символа.';
+      return 'Название слишком короткое: минимум 1 символ.';
     case 'too_long':
       return 'Название слишком длинное: максимум 32 символа.';
     case 'bad_chars':

shine-UI/js/services/ui-error-texts.js

@@ -55,9 +55,10 @@ export function toUserMessage(error, fallback = 'Действие не выпо
     text.includes('channel name must match') ||
     text.includes('channelname contains unsupported') ||
     text.includes('channelname length must be 3..32') ||
+    text.includes('channelname length must be 1..32') ||
     text.includes('bad_channel_name')
   ) {
-    return 'Некорректное название канала. Разрешены кириллица, латиница, цифры, пробел, _ и - (3..32 символа).';
+    return 'Некорректное название канала. Разрешены кириллица, латиница, цифры, пробел, _ и - (1..32 символа).';
   }
 
   if (text.includes('channel name is required') || text.includes('введите имя канала')) {