Каналы: добавить профиль через TEXT_CHANNEL_META

SHiNE-server/shine-server-blockchain/src/main/java/blockchain/BodyRecordParser.java

@@ -36,7 +36,8 @@ public final class BodyRecordParser {
             case TextBody.KEY -> {
                 if (st == (MsgSubType.TEXT_POST & 0xFFFF)
                         || st == (MsgSubType.TEXT_EDIT_POST & 0xFFFF)
-                        || st == (MsgSubType.TEXT_REPOST & 0xFFFF)) {
+                        || st == (MsgSubType.TEXT_REPOST & 0xFFFF)
+                        || st == (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)) {
                     yield new TextLineBody(subType, version, bodyBytes);
                 }
 

SHiNE-server/shine-server-blockchain/src/main/java/blockchain/MsgSubType.java

@@ -70,6 +70,12 @@ public final class MsgSubType {
      */
     public static final short TEXT_REPOST = 30;
 
+    /**
+     * CHANNEL_META — скрытый технический снимок профиля канала.
+     * Имеет hasLine, использует body как POST: line-поля + UTF-8 текст.
+     */
+    public static final short TEXT_CHANNEL_META = 70;
+
     /* ===================== REACTION (msg_type=2) ===================== */
 
     /** Лайк (LIKE). */

SHiNE-server/shine-server-blockchain/src/main/java/blockchain/body/TextLineBody.java

@@ -17,10 +17,11 @@ import java.util.Objects;
  *  - POST      (10)
  *  - EDIT_POST (11)
  *  - REPOST    (30)
+ *  - CHANNEL_META (70)
  *
  * Формат bodyBytes (BigEndian):
  *
- * POST:
+ * POST / CHANNEL_META:
  *   [4]  lineCode
  *   [4]  prevLineNumber
  *   [32] prevLineHash32
@@ -89,8 +90,9 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
         int st = this.subType & 0xFFFF;
         if (st != (MsgSubType.TEXT_POST & 0xFFFF)
                 && st != (MsgSubType.TEXT_EDIT_POST & 0xFFFF)
-                && st != (MsgSubType.TEXT_REPOST & 0xFFFF)) {
-            throw new IllegalArgumentException("TextLineBody supports only POST/EDIT_POST/REPOST, got subType=" + st);
+                && st != (MsgSubType.TEXT_REPOST & 0xFFFF)
+                && st != (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)) {
+            throw new IllegalArgumentException("TextLineBody supports only POST/EDIT_POST/REPOST/CHANNEL_META, got subType=" + st);
         }
 
         ByteBuffer bb = ByteBuffer.wrap(bodyBytes).order(ByteOrder.BIG_ENDIAN);
@@ -133,7 +135,8 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
             this.toBlockHash32 = null;
         }
 
-        this.message = readStrictUtf8Len16(bb, "TextLineBody text", st == (MsgSubType.TEXT_EDIT_POST & 0xFFFF));
+        this.message = readStrictUtf8Len16(bb, "TextLineBody text",
+                st == (MsgSubType.TEXT_EDIT_POST & 0xFFFF) || st == (MsgSubType.TEXT_CHANNEL_META & 0xFFFF));
 
         ensureNoTail(bb, "TextLineBody");
     }
@@ -155,8 +158,9 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
         int st = subType & 0xFFFF;
         if (st != (MsgSubType.TEXT_POST & 0xFFFF)
                 && st != (MsgSubType.TEXT_EDIT_POST & 0xFFFF)
-                && st != (MsgSubType.TEXT_REPOST & 0xFFFF)) {
-            throw new IllegalArgumentException("TextLineBody supports only POST/EDIT_POST/REPOST");
+                && st != (MsgSubType.TEXT_REPOST & 0xFFFF)
+                && st != (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)) {
+            throw new IllegalArgumentException("TextLineBody supports only POST/EDIT_POST/REPOST/CHANNEL_META");
         }
 
         if (lineCode < 0) throw new IllegalArgumentException("lineCode < 0");
@@ -206,7 +210,8 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
         int st = subType & 0xFFFF;
         if (st != (MsgSubType.TEXT_POST & 0xFFFF)
                 && st != (MsgSubType.TEXT_EDIT_POST & 0xFFFF)
-                && st != (MsgSubType.TEXT_REPOST & 0xFFFF))
+                && st != (MsgSubType.TEXT_REPOST & 0xFFFF)
+                && st != (MsgSubType.TEXT_CHANNEL_META & 0xFFFF))
             throw new IllegalArgumentException("Bad TextLineBody subType: " + st);
 
         if (lineCode < 0) throw new IllegalArgumentException("lineCode < 0");
@@ -231,10 +236,13 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
             if (toBlockHash32 == null || toBlockHash32.length != 32)
                 throw new IllegalArgumentException("REPOST toBlockHash32 invalid");
         } else {
-            if (message == null || message.isBlank())
+            if (st == (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)) {
+                if (message == null) throw new IllegalArgumentException("CHANNEL_META message is null");
+            } else if (message == null || message.isBlank()) {
                 throw new IllegalArgumentException("Text message is blank");
+            }
             if (toBlockchainName != null || toBlockGlobalNumber != null || toBlockHash32 != null)
-                throw new IllegalArgumentException("POST must not contain target fields");
+                throw new IllegalArgumentException("POST/CHANNEL_META must not contain target fields");
         }
 
         return this;
@@ -251,7 +259,7 @@ public final class TextLineBody implements BodyRecord, BodyHasLine, BodyHasTarge
         }
 
         int cap;
-        if (st == (MsgSubType.TEXT_POST & 0xFFFF)) {
+        if (st == (MsgSubType.TEXT_POST & 0xFFFF) || st == (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)) {
             cap = (4 + 4 + 32 + 4) + 2 + msgUtf8.length;
         } else if (st == (MsgSubType.TEXT_EDIT_POST & 0xFFFF)) {
             // EDIT_POST

SHiNE-server/shine-server-db/src/main/java/shine/db/DatabaseInitializer.java

@@ -20,9 +20,11 @@ public final class DatabaseInitializer {
     public static final int SCHEMA_VERSION_1 = 1;
     public static final int SCHEMA_VERSION_2 = 2;
     public static final int SCHEMA_VERSION_3 = 3;
+    public static final int SCHEMA_VERSION_4 = 4;
     public static final String POSTGRES_SCHEMA_RESOURCE = "postgres/schema_v1.sql";
     public static final String POSTGRES_MIGRATION_V2_RESOURCE = "postgres/migration_v2.sql";
     public static final String POSTGRES_MIGRATION_V3_RESOURCE = "postgres/migration_v3.sql";
+    public static final String POSTGRES_MIGRATION_V4_RESOURCE = "postgres/migration_v4.sql";
 
     private DatabaseInitializer() {}
 
@@ -31,6 +33,7 @@ public final class DatabaseInitializer {
     public static final short TEXT_REPLY = 20;
     public static final short TEXT_EDIT_REPLY = 21;
     public static final short TEXT_REPOST = 30;
+    public static final short TEXT_CHANNEL_META = 70;
 
     public static final short REACTION_LIKE = 1;
     public static final short REACTION_UNLIKE = 2;
@@ -88,6 +91,10 @@ public final class DatabaseInitializer {
             }
             if (currentVersion < SCHEMA_VERSION_3) {
                 runSqlScript(conn, POSTGRES_MIGRATION_V3_RESOURCE);
+                currentVersion = SCHEMA_VERSION_3;
+            }
+            if (currentVersion < SCHEMA_VERSION_4) {
+                runSqlScript(conn, POSTGRES_MIGRATION_V4_RESOURCE);
             }
         }
     }

SHiNE-server/shine-server-db/src/main/java/shine/db/MsgSubType.java

@@ -33,6 +33,9 @@ public final class MsgSubType {
     /** REPOST — репост сообщения в линии канала (с комментарием и target на оригинал). */
     public static final short TEXT_REPOST = 30;
 
+    /** CHANNEL_META — скрытый технический снимок профиля канала. */
+    public static final short TEXT_CHANNEL_META = 70;
+
     /* ===================== REACTION (msg_type=2) ===================== */
 
     /** Лайк (LIKE). */

SHiNE-server/shine-server-db/src/main/java/shine/db/dao/ChannelNameStateDAO.java

@@ -65,8 +65,12 @@ public final class ChannelNameStateDAO {
                     channel_type_version,
                     channel_root_block_number,
                     channel_root_block_hash,
-                    created_at_ms
-                ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                    created_at_ms,
+                    ava_ar,
+                    ava_sha256,
+                    ava_size,
+                    meta_updated_at_ms
+                ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                 """;
         try (PreparedStatement ps = c.prepareStatement(sql)) {
             ps.setString(1, entry.getSlug());
@@ -79,6 +83,34 @@ public final class ChannelNameStateDAO {
             ps.setInt(8, entry.getChannelRootBlockNumber());
             ps.setBytes(9, entry.getChannelRootBlockHash());
             ps.setLong(10, entry.getCreatedAtMs());
+            ps.setString(11, entry.getAvaAr() == null ? "" : entry.getAvaAr());
+            ps.setString(12, entry.getAvaSha256() == null ? "" : entry.getAvaSha256());
+            ps.setLong(13, Math.max(0L, entry.getAvaSize()));
+            ps.setLong(14, Math.max(0L, entry.getMetaUpdatedAtMs()));
+            ps.executeUpdate();
+        }
+    }
+
+    public void updateMeta(Connection c, ChannelNameStateEntry entry) throws SQLException {
+        String sql = """
+                UPDATE channel_names_state
+                SET display_name = ?,
+                    channel_description = ?,
+                    ava_ar = ?,
+                    ava_sha256 = ?,
+                    ava_size = ?,
+                    meta_updated_at_ms = ?
+                WHERE owner_bch_name = ? AND channel_root_block_number = ?
+                """;
+        try (PreparedStatement ps = c.prepareStatement(sql)) {
+            ps.setString(1, entry.getDisplayName() == null ? "" : entry.getDisplayName());
+            ps.setString(2, entry.getChannelDescription() == null ? "" : entry.getChannelDescription());
+            ps.setString(3, entry.getAvaAr() == null ? "" : entry.getAvaAr());
+            ps.setString(4, entry.getAvaSha256() == null ? "" : entry.getAvaSha256());
+            ps.setLong(5, Math.max(0L, entry.getAvaSize()));
+            ps.setLong(6, Math.max(0L, entry.getMetaUpdatedAtMs()));
+            ps.setString(7, entry.getOwnerBlockchainName());
+            ps.setInt(8, entry.getChannelRootBlockNumber());
             ps.executeUpdate();
         }
     }

SHiNE-server/shine-server-db/src/main/java/shine/db/entities/ChannelNameStateEntry.java

@@ -13,6 +13,10 @@ public class ChannelNameStateEntry {
     private int channelRootBlockNumber;
     private byte[] channelRootBlockHash;
     private long createdAtMs;
+    private String avaAr;
+    private String avaSha256;
+    private long avaSize;
+    private long metaUpdatedAtMs;
 
     public String getSlug() {
         return slug;
@@ -93,4 +97,36 @@ public class ChannelNameStateEntry {
     public void setCreatedAtMs(long createdAtMs) {
         this.createdAtMs = createdAtMs;
     }
+
+    public String getAvaAr() {
+        return avaAr;
+    }
+
+    public void setAvaAr(String avaAr) {
+        this.avaAr = avaAr;
+    }
+
+    public String getAvaSha256() {
+        return avaSha256;
+    }
+
+    public void setAvaSha256(String avaSha256) {
+        this.avaSha256 = avaSha256;
+    }
+
+    public long getAvaSize() {
+        return avaSize;
+    }
+
+    public void setAvaSize(long avaSize) {
+        this.avaSize = avaSize;
+    }
+
+    public long getMetaUpdatedAtMs() {
+        return metaUpdatedAtMs;
+    }
+
+    public void setMetaUpdatedAtMs(long metaUpdatedAtMs) {
+        this.metaUpdatedAtMs = metaUpdatedAtMs;
+    }
 }

SHiNE-server/shine-server-db/src/main/resources/postgres/migration_v4.sql

@@ -0,0 +1,15 @@
+BEGIN;
+
+ALTER TABLE channel_names_state
+    ADD COLUMN IF NOT EXISTS ava_ar TEXT NOT NULL DEFAULT '',
+    ADD COLUMN IF NOT EXISTS ava_sha256 TEXT NOT NULL DEFAULT '',
+    ADD COLUMN IF NOT EXISTS ava_size BIGINT NOT NULL DEFAULT 0,
+    ADD COLUMN IF NOT EXISTS meta_updated_at_ms BIGINT NOT NULL DEFAULT 0;
+
+INSERT INTO db_schema_version (id, schema_version, updated_at_ms)
+VALUES (1, 4, CAST(EXTRACT(EPOCH FROM clock_timestamp()) * 1000 AS BIGINT))
+ON CONFLICT (id) DO UPDATE SET
+    schema_version = EXCLUDED.schema_version,
+    updated_at_ms = EXCLUDED.updated_at_ms;
+
+COMMIT;

SHiNE-server/shine-server-db/src/main/resources/postgres/schema_v1.sql

@@ -536,7 +536,11 @@ CREATE TABLE IF NOT EXISTS channel_names_state (
     channel_type_version      INTEGER NOT NULL DEFAULT 1,
     channel_root_block_number INTEGER NOT NULL,
     channel_root_block_hash   BYTEA NOT NULL,
-    created_at_ms             BIGINT NOT NULL
+    created_at_ms             BIGINT NOT NULL,
+    ava_ar                    TEXT NOT NULL DEFAULT '',
+    ava_sha256                TEXT NOT NULL DEFAULT '',
+    ava_size                  BIGINT NOT NULL DEFAULT 0,
+    meta_updated_at_ms        BIGINT NOT NULL DEFAULT 0
 );
 
 CREATE UNIQUE INDEX IF NOT EXISTS uq_channel_names_state_owner_type_slug

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/blockchain/Net_AddBlock_Handler.java

@@ -21,6 +21,7 @@ import server.sync.BlockchainResyncGuard;
 import server.logic.ws_protocol.JSON.handlers.blockchain.Net_AddBlock_Handler_utils.BlockchainWriter;
 import server.logic.ws_protocol.JSON.handlers.blockchain.entyties.Net_AddBlock_Request;
 import server.logic.ws_protocol.JSON.handlers.blockchain.entyties.Net_AddBlock_Response;
+import server.logic.ws_protocol.JSON.handlers.channels.ChannelMetaTextParser;
 import server.logic.ws_protocol.JSON.handlers.channels.ChannelNamesStateBootstrapper;
 import server.logic.ws_protocol.WireCodes;
 import server.sync.AddBlockSyncService;
@@ -277,6 +278,7 @@ public final class Net_AddBlock_Handler implements JsonMessageHandler {
         }
 
         ChannelNameStateEntry channelNameStateEntry = null;
+        ChannelNameStateEntry channelMetaUpdateEntry = null;
         Chat200CreateSeed chat200CreateSeed = null;
         if (block.body instanceof CreateChannelBody createChannelBody) {
             int channelTypeCode = Short.toUnsignedInt(createChannelBody.channelTypeCode);
@@ -329,6 +331,39 @@ public final class Net_AddBlock_Handler implements JsonMessageHandler {
                 chat200CreateSeed.chatTitle = channelNameStateEntry.getChannelDescription();
                 chat200CreateSeed.updatedAtMs = block.timestamp * 1000L;
             }
+        } else if ((block.type & 0xFFFF) == 1
+                && (block.subType & 0xFFFF) == (MsgSubType.TEXT_CHANNEL_META & 0xFFFF)
+                && block.body instanceof TextLineBody metaBody) {
+            int lineCode = metaBody.lineCode();
+            if (lineCode <= 0) {
+                return new AddBlockResult(WireCodes.Status.BAD_REQUEST, "bad_channel_meta_line", serverLastNum, serverLastHashHex);
+            }
+            ExistingChannelState existingChannel;
+            try {
+                existingChannel = loadExistingChannelState(blockchainName, lineCode);
+            } catch (Exception e) {
+                log.error("AddBlock: channel_meta_lookup_failed (login={}, blockchainName={}, lineCode={})",
+                        login, blockchainName, lineCode, e);
+                return new AddBlockResult(WireCodes.Status.INTERNAL_ERROR, "internal_error", serverLastNum, serverLastHashHex);
+            }
+            if (existingChannel == null) {
+                return new AddBlockResult(WireCodes.Status.BAD_REQUEST, "channel_not_found", serverLastNum, serverLastHashHex);
+            }
+            ChannelMetaTextParser.Parsed parsedMeta;
+            try {
+                parsedMeta = ChannelMetaTextParser.parseStrict(metaBody.message, existingChannel.slug);
+            } catch (IllegalArgumentException e) {
+                return new AddBlockResult(WireCodes.Status.BAD_REQUEST, e.getMessage(), serverLastNum, serverLastHashHex);
+            }
+            channelMetaUpdateEntry = new ChannelNameStateEntry();
+            channelMetaUpdateEntry.setOwnerBlockchainName(blockchainName);
+            channelMetaUpdateEntry.setChannelRootBlockNumber(lineCode);
+            channelMetaUpdateEntry.setDisplayName(parsedMeta.title());
+            channelMetaUpdateEntry.setChannelDescription(parsedMeta.description());
+            channelMetaUpdateEntry.setAvaAr(parsedMeta.avaAr());
+            channelMetaUpdateEntry.setAvaSha256(parsedMeta.avaSha256());
+            channelMetaUpdateEntry.setAvaSize(parsedMeta.avaSize());
+            channelMetaUpdateEntry.setMetaUpdatedAtMs(block.timestamp * 1000L);
         }
 
         // 4.2) запрет дырок: blockNumber строго last+1
@@ -485,7 +520,7 @@ public final class Net_AddBlock_Handler implements JsonMessageHandler {
                 );
             }
 
-            dbWriter.appendBlockAndState(blockchainName, block, st, be, upsertedParam, channelNameStateEntry);
+            dbWriter.appendBlockAndState(blockchainName, block, st, be, upsertedParam, channelNameStateEntry, channelMetaUpdateEntry);
 
             if (chat200CreateSeed != null) {
                 upsertChat200StateFromCreate(chat200CreateSeed);
@@ -544,6 +579,29 @@ public final class Net_AddBlock_Handler implements JsonMessageHandler {
         long updatedAtMs;
     }
 
+    private static final class ExistingChannelState {
+        String slug;
+    }
+
+    private ExistingChannelState loadExistingChannelState(String ownerBch, int rootBlockNumber) throws Exception {
+        try (Connection c = shine.db.DbController.getInstance().getConnection();
+             PreparedStatement ps = c.prepareStatement("""
+                 SELECT slug
+                 FROM channel_names_state
+                 WHERE owner_bch_name = ? AND channel_root_block_number = ?
+                 LIMIT 1
+                 """)) {
+            ps.setString(1, ownerBch);
+            ps.setInt(2, rootBlockNumber);
+            try (ResultSet rs = ps.executeQuery()) {
+                if (!rs.next()) return null;
+                ExistingChannelState state = new ExistingChannelState();
+                state.slug = rs.getString("slug");
+                return state;
+            }
+        }
+    }
+
     private void upsertChat200StateFromCreate(Chat200CreateSeed seed) throws Exception {
         try (Connection c = shine.db.DbController.getInstance().getConnection();
              PreparedStatement ps = c.prepareStatement("""

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/blockchain/Net_AddBlock_Handler_utils/BlockchainWriter.java

@@ -58,7 +58,8 @@ public final class BlockchainWriter {
                                     BlockchainStateEntry st,
                                     BlockEntry be,
                                     UserParamEntry userParamEntry,
-                                    ChannelNameStateEntry channelNameStateEntry) throws SQLException {
+                                    ChannelNameStateEntry channelNameStateEntry,
+                                    ChannelNameStateEntry channelMetaUpdateEntry) throws SQLException {
 
         long nowMs = System.currentTimeMillis();
         byte[] blockBytes = block.toBytes();
@@ -91,6 +92,10 @@ public final class BlockchainWriter {
                     channelNameStateDAO.insert(c, channelNameStateEntry);
                 }
 
+                if (channelMetaUpdateEntry != null) {
+                    channelNameStateDAO.updateMeta(c, channelMetaUpdateEntry);
+                }
+
                 c.commit();
                 committed = true;
             } catch (Exception e) {

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/ChannelMetaTextParser.java

@@ -0,0 +1,112 @@
+package server.logic.ws_protocol.JSON.handlers.channels;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public final class ChannelMetaTextParser {
+    public static final int MAX_TITLE_CHARS = 50;
+    public static final int MAX_DESCRIPTION_CHARS = 250;
+
+    private ChannelMetaTextParser() {}
+
+    public static Parsed parseStrict(String rawText, String fallbackTitle) {
+        String text = String.valueOf(rawText == null ? "" : rawText);
+        String title = "";
+        String avaAr = "";
+        String avaSha256 = "";
+        long avaSize = 0L;
+        boolean seenTitle = false;
+        boolean seenAvatar = false;
+
+        int offset = 0;
+        while (text.startsWith("<SHiNE:", offset)) {
+            int end = text.indexOf('>', offset);
+            if (end < 0) throw new IllegalArgumentException("bad_channel_meta_tag");
+            String body = text.substring(offset + "<SHiNE:".length(), end);
+            if (body.startsWith("title;")) {
+                if (seenTitle) throw new IllegalArgumentException("duplicate_channel_meta_title");
+                seenTitle = true;
+                title = parseTitleTag(body);
+            } else if (body.startsWith("avatar;")) {
+                if (seenAvatar) throw new IllegalArgumentException("duplicate_channel_meta_avatar");
+                seenAvatar = true;
+                Avatar avatar = parseAvatarTag(body);
+                avaAr = avatar.ar;
+                avaSha256 = avatar.sha256;
+                avaSize = avatar.size;
+            } else {
+                throw new IllegalArgumentException("unknown_channel_meta_tag");
+            }
+            offset = end + 1;
+            if (offset < text.length() && text.charAt(offset) == '\n') offset += 1;
+        }
+
+        String description = text.substring(offset).trim();
+        if (countCodePoints(description) > MAX_DESCRIPTION_CHARS) {
+            throw new IllegalArgumentException("channel_meta_description_too_long");
+        }
+
+        String cleanTitle = title.isBlank() ? String.valueOf(fallbackTitle == null ? "" : fallbackTitle).trim() : title.trim();
+        validateTitle(cleanTitle);
+
+        return new Parsed(cleanTitle, description, avaAr, avaSha256, avaSize);
+    }
+
+    private static String parseTitleTag(String body) {
+        String prefix = "title;v=1;";
+        if (!body.startsWith(prefix)) throw new IllegalArgumentException("bad_channel_meta_title");
+        String title = body.substring(prefix.length()).trim();
+        validateTitle(title);
+        return title;
+    }
+
+    private static Avatar parseAvatarTag(String body) {
+        Map<String, String> fields = parseFields(body.substring("avatar;".length()));
+        if (!"1".equals(fields.get("v"))) throw new IllegalArgumentException("bad_channel_meta_avatar_version");
+        String ar = String.valueOf(fields.getOrDefault("ar", "")).trim();
+        String sha256 = String.valueOf(fields.getOrDefault("sha256", "")).trim().toLowerCase();
+        String sizeRaw = String.valueOf(fields.getOrDefault("size", "")).trim();
+        if (!ar.matches("^[A-Za-z0-9_-]{43}$")) throw new IllegalArgumentException("bad_channel_meta_avatar_ar");
+        if (!sha256.matches("^[0-9a-f]{64}$")) throw new IllegalArgumentException("bad_channel_meta_avatar_sha256");
+        long size;
+        try {
+            size = Long.parseLong(sizeRaw);
+        } catch (Exception e) {
+            throw new IllegalArgumentException("bad_channel_meta_avatar_size");
+        }
+        if (size <= 0L) throw new IllegalArgumentException("bad_channel_meta_avatar_size");
+        return new Avatar(ar, sha256, size);
+    }
+
+    private static Map<String, String> parseFields(String raw) {
+        Map<String, String> out = new HashMap<>();
+        for (String part : String.valueOf(raw == null ? "" : raw).split(";")) {
+            int eq = part.indexOf('=');
+            if (eq <= 0) continue;
+            String key = part.substring(0, eq).trim();
+            String value = part.substring(eq + 1).trim();
+            if (!key.isEmpty()) out.put(key, value);
+        }
+        return out;
+    }
+
+    private static void validateTitle(String title) {
+        String value = String.valueOf(title == null ? "" : title);
+        if (value.indexOf('<') >= 0 || value.indexOf('>') >= 0 || value.indexOf(';') >= 0
+                || value.indexOf('\t') >= 0 || value.indexOf('\n') >= 0 || value.indexOf('\r') >= 0
+                || value.indexOf('\0') >= 0) {
+            throw new IllegalArgumentException("bad_channel_meta_title_chars");
+        }
+        if (countCodePoints(value) > MAX_TITLE_CHARS) {
+            throw new IllegalArgumentException("channel_meta_title_too_long");
+        }
+    }
+
+    private static int countCodePoints(String value) {
+        return String.valueOf(value == null ? "" : value).codePointCount(0, String.valueOf(value == null ? "" : value).length());
+    }
+
+    private record Avatar(String ar, String sha256, long size) {}
+
+    public record Parsed(String title, String description, String avaAr, String avaSha256, long avaSize) {}
+}

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/ChannelsReadSupport.java

@@ -23,8 +23,6 @@ final class ChannelsReadSupport {
     static final int MSG_TYPE_REACTION = 2;
     static final int MSG_TYPE_TECH = 0;
     static final String STORIES_CHANNEL_NAME = "stories";
-    static final String COMMAND_PREFIX = "/.";
-    static final String COMMAND_DESC = "desc";
     static final String COMMAND_ADD = "add";
     static final String COMMAND_REMOVE = "remove";
 
@@ -47,11 +45,40 @@ final class ChannelsReadSupport {
 
         if (rootNumber == 0) {
             meta.channelName = STORIES_CHANNEL_NAME;
-            meta.channelDescription = detectLatestDescriptionCommand(c, ownerBch, 0);
+            meta.displayName = STORIES_CHANNEL_NAME;
+            meta.channelDescription = "";
             meta.channelTypeCode = CreateChannelBody.CHANNEL_TYPE_STORIES & 0xFFFF;
             return meta;
         }
 
+        String stateSql = """
+            SELECT slug, display_name, channel_description, channel_type_code, channel_type_version,
+                   ava_ar, ava_sha256, ava_size, meta_updated_at_ms
+            FROM channel_names_state
+            WHERE owner_bch_name = ? AND channel_root_block_number = ?
+            LIMIT 1
+            """;
+        try (PreparedStatement ps = c.prepareStatement(stateSql)) {
+            ps.setString(1, ownerBch);
+            ps.setInt(2, rootNumber);
+            try (ResultSet rs = ps.executeQuery()) {
+                if (rs.next()) {
+                    meta.channelName = rs.getString("slug");
+                    meta.displayName = rs.getString("display_name");
+                    meta.channelDescription = String.valueOf(rs.getString("channel_description") == null ? "" : rs.getString("channel_description"));
+                    meta.channelTypeCode = rs.getInt("channel_type_code");
+                    meta.channelTypeVersion = rs.getInt("channel_type_version");
+                    meta.avaAr = String.valueOf(rs.getString("ava_ar") == null ? "" : rs.getString("ava_ar"));
+                    meta.avaSha256 = String.valueOf(rs.getString("ava_sha256") == null ? "" : rs.getString("ava_sha256"));
+                    meta.avaSize = rs.getLong("ava_size");
+                    meta.metaUpdatedAtMs = rs.getLong("meta_updated_at_ms");
+                    return meta;
+                }
+            }
+        } catch (SQLException ignored) {
+            // fallback ниже для окружений до миграции.
+        }
+
         String sql = "SELECT block_bytes FROM blocks WHERE bch_name=? AND block_number=? LIMIT 1";
         try (PreparedStatement ps = c.prepareStatement(sql)) {
             ps.setString(1, ownerBch);
@@ -68,21 +95,20 @@ final class ChannelsReadSupport {
                 BodyRecord body = e.body;
                 if (body instanceof CreateChannelBody ccb) {
                     meta.channelName = ccb.channelName;
+                    meta.displayName = ccb.channelName;
                     meta.channelDescription = ccb.channelDescription == null ? "" : ccb.channelDescription;
                     meta.channelTypeCode = Short.toUnsignedInt(ccb.channelTypeCode);
                     meta.channelTypeVersion = Short.toUnsignedInt(ccb.channelTypeVersion);
                 } else {
                     meta.channelName = null;
+                    meta.displayName = null;
                     meta.channelDescription = "";
                     meta.channelTypeCode = CreateChannelBody.CHANNEL_TYPE_PUBLIC & 0xFFFF;
                 }
-                String updatedDescription = detectLatestDescriptionCommand(c, ownerBch, rootNumber);
-                if (updatedDescription != null) {
-                    meta.channelDescription = updatedDescription;
-                }
                 return meta;
             } catch (Exception ignored) {
                 meta.channelName = null;
+                meta.displayName = null;
                 meta.channelDescription = "";
                 meta.channelTypeCode = CreateChannelBody.CHANNEL_TYPE_PUBLIC & 0xFFFF;
                 return meta;
@@ -106,7 +132,7 @@ final class ChannelsReadSupport {
 
     static PostBlock loadLastPost(Connection c, String ownerBch, int lineCode) throws SQLException {
         String sql = """
-            SELECT login,bch_name,block_number,block_hash,block_bytes
+            SELECT login,bch_name,block_number,block_hash,block_bytes,this_line_number
             FROM blocks
             WHERE bch_name=? AND msg_type=? AND msg_sub_type IN (?, ?) AND line_code=?
             ORDER BY block_number DESC
@@ -270,8 +296,7 @@ final class ChannelsReadSupport {
 
     static String detectChannelDescription(Connection c, String ownerBch, int rootNumber) throws SQLException {
         if (rootNumber == 0) {
-            String fromCommand = detectLatestDescriptionCommand(c, ownerBch, 0);
-            return fromCommand == null ? "" : fromCommand;
+            return "";
         }
 
         // Preferred source: persisted state (fast path, works for CreateChannelBody v2).
@@ -287,8 +312,7 @@ final class ChannelsReadSupport {
             try (ResultSet rs = ps.executeQuery()) {
                 if (rs.next()) {
                     String saved = String.valueOf(rs.getString("channel_description") == null ? "" : rs.getString("channel_description"));
-                    String fromCommand = detectLatestDescriptionCommand(c, ownerBch, rootNumber);
-                    return fromCommand == null ? saved : fromCommand;
+                    return saved;
                 }
             }
         } catch (SQLException ignored) {
@@ -306,8 +330,6 @@ final class ChannelsReadSupport {
                 BchBlockEntry e = new BchBlockEntry(bytes);
                 BodyRecord body = e.body;
                 if (body instanceof CreateChannelBody ccb) {
-                    String fromCommand = detectLatestDescriptionCommand(c, ownerBch, rootNumber);
-                    if (fromCommand != null) return fromCommand;
                     return ccb.channelDescription == null ? "" : ccb.channelDescription;
                 }
                 return "";
@@ -363,45 +385,90 @@ final class ChannelsReadSupport {
         return meta.channelTypeVersion;
     }
 
-    static String detectLatestDescriptionCommand(Connection c, String ownerBch, int lineCode) throws SQLException {
-        String sql = """
-            SELECT block_bytes
+    static List<MetaEvent> channelMetaEvents(Connection c, String ownerBch, int lineCode) throws SQLException {
+        List<MetaEvent> out = new ArrayList<>();
+        if (lineCode <= 0) return out;
+        ChannelMeta base = detectChannelMeta(c, ownerBch, lineCode);
+        String rootSql = """
+            SELECT login,bch_name,block_number,block_hash,block_bytes
             FROM blocks
-            WHERE bch_name=? AND msg_type=? AND msg_sub_type IN (?, ?) AND line_code=?
-            ORDER BY block_number DESC
-            LIMIT 300
+            WHERE bch_name=? AND msg_type=? AND msg_sub_type=? AND block_number=?
+            LIMIT 1
+            """;
+        try (PreparedStatement ps = c.prepareStatement(rootSql)) {
+            ps.setString(1, ownerBch);
+            ps.setInt(2, MSG_TYPE_TECH);
+            ps.setInt(3, 1);
+            ps.setInt(4, lineCode);
+            try (ResultSet rs = ps.executeQuery()) {
+                if (rs.next()) {
+                    MetaEvent event = new MetaEvent();
+                    event.kind = "created";
+                    event.login = rs.getString("login");
+                    event.bchName = rs.getString("bch_name");
+                    event.blockNumber = rs.getInt("block_number");
+                    event.blockHash = rs.getBytes("block_hash");
+                    event.lineStep = (Integer) rs.getObject("this_line_number");
+                    try {
+                        BchBlockEntry entry = new BchBlockEntry(rs.getBytes("block_bytes"));
+                        event.createdAtMs = entry.timestamp * 1000L;
+                        if (entry.body instanceof CreateChannelBody ccb) {
+                            event.title = ccb.channelName;
+                            event.description = ccb.channelDescription == null ? "" : ccb.channelDescription;
+                        }
+                    } catch (Exception ignored) {
+                        event.createdAtMs = 0L;
+                    }
+                    if (event.title == null || event.title.isBlank()) {
+                        event.title = base.displayName == null || base.displayName.isBlank() ? base.channelName : base.displayName;
+                    }
+                    if (event.description == null) event.description = "";
+                    event.avaAr = "";
+                    event.avaSha256 = "";
+                    event.avaSize = 0L;
+                    out.add(event);
+                }
+            }
+        }
+
+        String sql = """
+            SELECT login,bch_name,block_number,block_hash,block_bytes,this_line_number
+            FROM blocks
+            WHERE bch_name=? AND msg_type=? AND msg_sub_type=? AND line_code=?
+            ORDER BY block_number ASC
             """;
         try (PreparedStatement ps = c.prepareStatement(sql)) {
             ps.setString(1, ownerBch);
             ps.setInt(2, MSG_TYPE_TEXT);
-            ps.setInt(3, MsgSubType.TEXT_POST);
-            ps.setInt(4, MsgSubType.TEXT_REPOST);
-            ps.setInt(5, lineCode);
+            ps.setInt(3, MsgSubType.TEXT_CHANNEL_META);
+            ps.setInt(4, lineCode);
             try (ResultSet rs = ps.executeQuery()) {
                 while (rs.next()) {
-                    TextInfo info = parseTextAndTime(rs.getBytes("block_bytes"));
-                    CommandInfo commandInfo = parseCommandText(info.text);
-                    if (commandInfo != null && COMMAND_DESC.equals(commandInfo.command)) {
-                        return commandInfo.arg;
+                    byte[] bytes = rs.getBytes("block_bytes");
+                    TextInfo info = parseTextAndTime(bytes);
+                    try {
+                        ChannelMetaTextParser.Parsed parsed = ChannelMetaTextParser.parseStrict(info.text, base.channelName);
+                        MetaEvent event = new MetaEvent();
+                        event.kind = "profile_updated";
+                        event.login = rs.getString("login");
+                        event.bchName = rs.getString("bch_name");
+                        event.blockNumber = rs.getInt("block_number");
+                        event.blockHash = rs.getBytes("block_hash");
+                        event.lineStep = (Integer) rs.getObject("this_line_number");
+                        event.createdAtMs = info.createdAtMs;
+                        event.title = parsed.title();
+                        event.description = parsed.description();
+                        event.avaAr = parsed.avaAr();
+                        event.avaSha256 = parsed.avaSha256();
+                        event.avaSize = parsed.avaSize();
+                        out.add(event);
+                    } catch (Exception ignored) {
+                        // Невалидный meta-блок не участвует в системной истории UI.
                     }
                 }
             }
         }
-        return null;
-    }
-
-    static CommandInfo parseCommandText(String text) {
-        String value = String.valueOf(text == null ? "" : text).trim();
-        if (!value.startsWith(COMMAND_PREFIX)) return null;
-
-        String raw = value.substring(COMMAND_PREFIX.length()).trim();
-        if (raw.isEmpty()) return null;
-
-        int sp = raw.indexOf(' ');
-        String cmd = (sp < 0 ? raw : raw.substring(0, sp)).trim().toLowerCase();
-        String arg = sp < 0 ? "" : raw.substring(sp + 1).trim();
-        if (cmd.isEmpty()) return null;
-        return new CommandInfo(cmd, arg);
+        return out;
     }
 
     static PairChannelSelector findPersonalPairChannel(Connection c, String ownerLogin, String partnerLogin) throws SQLException {
@@ -526,19 +593,29 @@ final class ChannelsReadSupport {
 
     static final class ChannelMeta {
         String channelName;
+        String displayName;
         String channelDescription;
         int channelTypeCode;
         int channelTypeVersion;
+        String avaAr = "";
+        String avaSha256 = "";
+        long avaSize = 0L;
+        long metaUpdatedAtMs = 0L;
     }
 
-    static final class CommandInfo {
-        final String command;
-        final String arg;
-
-        CommandInfo(String command, String arg) {
-            this.command = command;
-            this.arg = arg;
-        }
+    static final class MetaEvent {
+        String kind;
+        String login;
+        String bchName;
+        int blockNumber;
+        byte[] blockHash;
+        Integer lineStep;
+        long createdAtMs;
+        String title;
+        String description;
+        String avaAr;
+        String avaSha256;
+        long avaSize;
     }
 
     static final class PairChannelSelector {

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/Net_GetChannelMessages_Handler.java

@@ -57,7 +57,12 @@ public class Net_GetChannelMessages_Handler implements JsonMessageHandler {
             channel.setOwnerLogin(BlockchainNameUtil.loginFromBlockchainName(ownerBch));
             ChannelsReadSupport.ChannelMeta meta = ChannelsReadSupport.detectChannelMeta(c, ownerBch, lineCode);
             channel.setChannelName(meta.channelName);
+            channel.setDisplayName(meta.displayName == null || meta.displayName.isBlank() ? meta.channelName : meta.displayName);
             channel.setChannelDescription(meta.channelDescription);
+            channel.setAvaAr(meta.avaAr);
+            channel.setAvaSha256(meta.avaSha256);
+            channel.setAvaSize(meta.avaSize);
+            channel.setMetaUpdatedAtMs(meta.metaUpdatedAtMs);
             channel.setChannelTypeCode(meta.channelTypeCode);
             channel.setChannelTypeVersion(meta.channelTypeVersion);
             Net_GetChannelMessages_Response.BlockRef rootRef = new Net_GetChannelMessages_Response.BlockRef();
@@ -66,6 +71,27 @@ public class Net_GetChannelMessages_Handler implements JsonMessageHandler {
             channel.setChannelRoot(rootRef);
             resp.setChannel(channel);
 
+            List<Net_GetChannelMessages_Response.ChannelMetaEvent> metaEvents = new ArrayList<>();
+            for (ChannelsReadSupport.MetaEvent event : ChannelsReadSupport.channelMetaEvents(c, ownerBch, lineCode)) {
+                Net_GetChannelMessages_Response.ChannelMetaEvent outEvent = new Net_GetChannelMessages_Response.ChannelMetaEvent();
+                outEvent.setKind(event.kind);
+                Net_GetChannelMessages_Response.BlockRef eventRef = new Net_GetChannelMessages_Response.BlockRef();
+                eventRef.setBlockNumber(event.blockNumber);
+                eventRef.setBlockHash(ChannelsReadSupport.toHex(event.blockHash));
+                outEvent.setMessageRef(eventRef);
+                outEvent.setAuthorLogin(event.login);
+                outEvent.setAuthorBlockchainName(event.bchName);
+                outEvent.setLineStep(event.lineStep);
+                outEvent.setCreatedAtMs(event.createdAtMs);
+                outEvent.setTitle(event.title);
+                outEvent.setDescription(event.description);
+                outEvent.setAvaAr(event.avaAr);
+                outEvent.setAvaSha256(event.avaSha256);
+                outEvent.setAvaSize(event.avaSize);
+                metaEvents.add(outEvent);
+            }
+            resp.setMetaEvents(metaEvents);
+
             List<ChannelsReadSupport.PostBlock> posts = new ArrayList<>(
                     ChannelsReadSupport.channelPosts(c, ownerBch, lineCode, limit, asc)
             );

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/Net_ListSubscriptionsFeed_Handler.java

@@ -65,7 +65,12 @@ public class Net_ListSubscriptionsFeed_Handler implements JsonMessageHandler {
             channelRef.setOwnerLogin(key.ownerLogin);
             channelRef.setOwnerBlockchainName(key.ownerBch);
             channelRef.setChannelName(meta.channelName);
+            channelRef.setDisplayName(meta.displayName == null || meta.displayName.isBlank() ? meta.channelName : meta.displayName);
             channelRef.setChannelDescription(meta.channelDescription);
+            channelRef.setAvaAr(meta.avaAr);
+            channelRef.setAvaSha256(meta.avaSha256);
+            channelRef.setAvaSize(meta.avaSize);
+            channelRef.setMetaUpdatedAtMs(meta.metaUpdatedAtMs);
             channelRef.setChannelTypeCode(meta.channelTypeCode);
             channelRef.setChannelTypeVersion(meta.channelTypeVersion);
             channelRef.setPersonal(meta.channelTypeCode == 100);

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/entyties/Net_GetChannelMessages_Response.java

@@ -8,6 +8,7 @@ import java.util.List;
 public class Net_GetChannelMessages_Response extends Net_Response {
     private Channel channel;
     private List<MessageItem> messages = new ArrayList<>();
+    private List<ChannelMetaEvent> metaEvents = new ArrayList<>();
 
     public Channel getChannel() { return channel; }
     public void setChannel(Channel channel) { this.channel = channel; }
@@ -15,12 +16,20 @@ public class Net_GetChannelMessages_Response extends Net_Response {
     public List<MessageItem> getMessages() { return messages; }
     public void setMessages(List<MessageItem> messages) { this.messages = messages; }
 
+    public List<ChannelMetaEvent> getMetaEvents() { return metaEvents; }
+    public void setMetaEvents(List<ChannelMetaEvent> metaEvents) { this.metaEvents = metaEvents; }
+
 
     public static class Channel {
         private String ownerLogin;
         private String ownerBlockchainName;
         private String channelName;
+        private String displayName;
         private String channelDescription;
+        private String avaAr;
+        private String avaSha256;
+        private Long avaSize;
+        private Long metaUpdatedAtMs;
         private Integer channelTypeCode;
         private Integer channelTypeVersion;
         private BlockRef channelRoot;
@@ -34,9 +43,24 @@ public class Net_GetChannelMessages_Response extends Net_Response {
         public String getChannelName() { return channelName; }
         public void setChannelName(String channelName) { this.channelName = channelName; }
 
+        public String getDisplayName() { return displayName; }
+        public void setDisplayName(String displayName) { this.displayName = displayName; }
+
         public String getChannelDescription() { return channelDescription; }
         public void setChannelDescription(String channelDescription) { this.channelDescription = channelDescription; }
 
+        public String getAvaAr() { return avaAr; }
+        public void setAvaAr(String avaAr) { this.avaAr = avaAr; }
+
+        public String getAvaSha256() { return avaSha256; }
+        public void setAvaSha256(String avaSha256) { this.avaSha256 = avaSha256; }
+
+        public Long getAvaSize() { return avaSize; }
+        public void setAvaSize(Long avaSize) { this.avaSize = avaSize; }
+
+        public Long getMetaUpdatedAtMs() { return metaUpdatedAtMs; }
+        public void setMetaUpdatedAtMs(Long metaUpdatedAtMs) { this.metaUpdatedAtMs = metaUpdatedAtMs; }
+
         public Integer getChannelTypeCode() { return channelTypeCode; }
         public void setChannelTypeCode(Integer channelTypeCode) { this.channelTypeCode = channelTypeCode; }
 
@@ -47,6 +71,53 @@ public class Net_GetChannelMessages_Response extends Net_Response {
         public void setChannelRoot(BlockRef channelRoot) { this.channelRoot = channelRoot; }
     }
 
+    public static class ChannelMetaEvent {
+        private String kind;
+        private BlockRef messageRef;
+        private String authorLogin;
+        private String authorBlockchainName;
+        private Integer lineStep;
+        private long createdAtMs;
+        private String title;
+        private String description;
+        private String avaAr;
+        private String avaSha256;
+        private Long avaSize;
+
+        public String getKind() { return kind; }
+        public void setKind(String kind) { this.kind = kind; }
+
+        public BlockRef getMessageRef() { return messageRef; }
+        public void setMessageRef(BlockRef messageRef) { this.messageRef = messageRef; }
+
+        public String getAuthorLogin() { return authorLogin; }
+        public void setAuthorLogin(String authorLogin) { this.authorLogin = authorLogin; }
+
+        public String getAuthorBlockchainName() { return authorBlockchainName; }
+        public void setAuthorBlockchainName(String authorBlockchainName) { this.authorBlockchainName = authorBlockchainName; }
+
+        public Integer getLineStep() { return lineStep; }
+        public void setLineStep(Integer lineStep) { this.lineStep = lineStep; }
+
+        public long getCreatedAtMs() { return createdAtMs; }
+        public void setCreatedAtMs(long createdAtMs) { this.createdAtMs = createdAtMs; }
+
+        public String getTitle() { return title; }
+        public void setTitle(String title) { this.title = title; }
+
+        public String getDescription() { return description; }
+        public void setDescription(String description) { this.description = description; }
+
+        public String getAvaAr() { return avaAr; }
+        public void setAvaAr(String avaAr) { this.avaAr = avaAr; }
+
+        public String getAvaSha256() { return avaSha256; }
+        public void setAvaSha256(String avaSha256) { this.avaSha256 = avaSha256; }
+
+        public Long getAvaSize() { return avaSize; }
+        public void setAvaSize(Long avaSize) { this.avaSize = avaSize; }
+    }
+
     public static class MessageItem {
         private BlockRef messageRef;
         private Integer msgSubType;

SHiNE-server/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/channels/entyties/Net_ListSubscriptionsFeed_Response.java

@@ -46,7 +46,12 @@ public class Net_ListSubscriptionsFeed_Response extends Net_Response {
         private String ownerLogin;
         private String ownerBlockchainName;
         private String channelName;
+        private String displayName;
         private String channelDescription;
+        private String avaAr;
+        private String avaSha256;
+        private Long avaSize;
+        private Long metaUpdatedAtMs;
         private Integer channelTypeCode;
         private Integer channelTypeVersion;
         private boolean personal;
@@ -61,9 +66,24 @@ public class Net_ListSubscriptionsFeed_Response extends Net_Response {
         public String getChannelName() { return channelName; }
         public void setChannelName(String channelName) { this.channelName = channelName; }
 
+        public String getDisplayName() { return displayName; }
+        public void setDisplayName(String displayName) { this.displayName = displayName; }
+
         public String getChannelDescription() { return channelDescription; }
         public void setChannelDescription(String channelDescription) { this.channelDescription = channelDescription; }
 
+        public String getAvaAr() { return avaAr; }
+        public void setAvaAr(String avaAr) { this.avaAr = avaAr; }
+
+        public String getAvaSha256() { return avaSha256; }
+        public void setAvaSha256(String avaSha256) { this.avaSha256 = avaSha256; }
+
+        public Long getAvaSize() { return avaSize; }
+        public void setAvaSize(Long avaSize) { this.avaSize = avaSize; }
+
+        public Long getMetaUpdatedAtMs() { return metaUpdatedAtMs; }
+        public void setMetaUpdatedAtMs(Long metaUpdatedAtMs) { this.metaUpdatedAtMs = metaUpdatedAtMs; }
+
         public Integer getChannelTypeCode() { return channelTypeCode; }
         public void setChannelTypeCode(Integer channelTypeCode) { this.channelTypeCode = channelTypeCode; }
 

VERSION.properties

@@ -1,2 +1,2 @@
-client.version=1.4.10
-server.version=1.4.0
+client.version=1.4.11
+server.version=1.4.1

docs/API/04_Add_Block_to_Blockchain_API.md

@@ -88,6 +88,7 @@
 - `limit_exceeded`
 - `chain_resync_in_progress` — цепочка временно заблокирована полным resync
 - `repost_disabled` — репосты временно отключены до будущей реализации
+- `bad_channel_meta_line`, `channel_not_found`, `bad_channel_meta_*`, `channel_meta_*_too_long` — ошибки `TEXT_CHANNEL_META`
 - `internal_error`
 
 ## 5. Какие блоки реально можно добавлять через `AddBlock`
@@ -104,6 +105,7 @@
    - `TEXT_REPLY (20)`
    - `TEXT_EDIT_REPLY (21)`
    - `TEXT_REPOST (30)` — формат зарезервирован, но новые блоки временно отклоняются с `repost_disabled`
+   - `TEXT_CHANNEL_META (70)` — скрытый технический снимок профиля канала
 
 3. **REACTION (type=2)**
    - `REACTION_LIKE (1)`

docs/API/06_Channels_Read_API.md

@@ -53,6 +53,12 @@
           "ownerLogin": "Alice",
           "ownerBlockchainName": "alice-001",
           "channelName": "0",
+          "displayName": "Мой канал",
+          "channelDescription": "Короткое описание",
+          "avaAr": "ArweaveTxId...",
+          "avaSha256": "0123...",
+          "avaSize": 248193,
+          "metaUpdatedAtMs": 1760000000000,
           "personal": true,
           "channelRoot": { "blockNumber": 0, "blockHash": "..." }
         },
@@ -141,8 +147,42 @@
       "ownerLogin": "Bob",
       "ownerBlockchainName": "bob-001",
       "channelName": "news",
+      "displayName": "Новости Bob",
+      "channelDescription": "Канал о новостях",
+      "avaAr": "ArweaveTxId...",
+      "avaSha256": "0123...",
+      "avaSize": 248193,
+      "metaUpdatedAtMs": 1760000000000,
       "channelRoot": { "blockNumber": 123, "blockHash": "..." }
     },
+    "metaEvents": [
+      {
+        "kind": "created",
+        "messageRef": { "blockNumber": 123, "blockHash": "..." },
+        "authorLogin": "Bob",
+        "authorBlockchainName": "bob-001",
+        "lineStep": 1,
+        "createdAtMs": 1760000000000,
+        "title": "news",
+        "description": "",
+        "avaAr": "",
+        "avaSha256": "",
+        "avaSize": 0
+      },
+      {
+        "kind": "profile_updated",
+        "messageRef": { "blockNumber": 130, "blockHash": "..." },
+        "authorLogin": "Bob",
+        "authorBlockchainName": "bob-001",
+        "lineStep": 2,
+        "createdAtMs": 1760000500000,
+        "title": "Новости Bob",
+        "description": "Канал о новостях",
+        "avaAr": "ArweaveTxId...",
+        "avaSha256": "0123...",
+        "avaSize": 248193
+      }
+    ],
     "messages": [
       {
         "messageRef": { "blockNumber": 140, "blockHash": "..." },

docs/Blockchain/02_Channel_Commands.md

@@ -1,33 +1,19 @@
 # Командные сообщения каналов
 
-## 1. Общий префикс
-Командные сообщения распознаются по префиксу:
+Команды в обычных `TEXT_POST` сообщениях каналов больше не используются для изменения профиля канала.
 
-`/.`
+## Удалённая команда `/.desc`
 
-Пример:
-- `/.desc Новый комментарий канала`
+Команда `/.desc <text>` больше не поддерживается и не применяется сервером.
 
-## 2. Поддерживаемые команды
+Описание, человекочитаемое имя и аватар канала меняются только через скрытый технический блок:
 
-### Для всех типов каналов (`0`, `1`, `100`, `200`)
-- `/.desc <text>` — смена описания канала.
+- `msg_type=1`
+- `subType=70`
+- `TEXT_CHANNEL_META`
 
-Примечание:
-- Описание канала в чтении определяется последней командой `/.desc` в линии канала.
-- Если `/.desc` не было, используется описание из `CreateChannel`.
+Спецификация: [16_TEXT_Channel_Meta.md](./16_TEXT_Channel_Meta.md).
 
-### Дополнительно для `type=200`
-- `/.add <login> <channelName>`
-- `/.remove <login> <channelName>`
+## Зарезервированные команды type=200
 
-Формат аргументов фиксирован: через пробел.
-
-## 3. Текущая модель применения
-- Команды передаются как обычные `TEXT_POST` сообщения.
-- Сервер уже применяет `/.desc` при вычислении актуального описания канала.
-- Команды `/.add` и `/.remove` зарезервированы под расширенную модель участников `type=200` на уровне UI/агрегации.
-
-## 4. Статус для MVP
-- В текущем UI каналы `type=100` и `type=200` не используются.
-- Соответственно, `/.add` и `/.remove` считаются запланированными и пока не участвуют в рабочем UI-сценарии.
+Команды `/.add` и `/.remove` для групповых каналов `type=200` остаются зарезервированными для будущей модели участников. В обычном UI текущего этапа они не используются.

docs/Blockchain/11_TEXT_Blocks.md

@@ -27,6 +27,14 @@ TEXT-тип хранит сообщения и редактирования.
    - на текущем этапе продуктовой логики репост не редактируется (версии не накапливаются);
    - временно отключён для записи через `AddBlock` до будущей реализации репостов.
 
+6. `subType=70` — `TEXT_CHANNEL_META`
+   - скрытый технический снимок профиля канала;
+   - содержит line-поля + текст с тегами `SHiNE:title`/`SHiNE:avatar` и описанием;
+   - не отображается как обычное сообщение ленты;
+   - применяется сервером к текущему состоянию канала.
+
+Подробная спецификация: [16_TEXT_Channel_Meta.md](./16_TEXT_Channel_Meta.md).
+
 ## Правило для edit
 
 `EDIT_POST` и `EDIT_REPLY` должны ссылаться на **оригинальный** блок, а не на предыдущий edit.

docs/Blockchain/16_TEXT_Channel_Meta.md

@@ -0,0 +1,59 @@
+# TEXT_CHANNEL_META: профиль канала
+
+`TEXT_CHANNEL_META` — скрытый технический `TEXT`-блок для полного снимка профиля канала.
+
+## Блок
+
+- `msg_type = 1`
+- `subType = 70`
+- `msgVersion = 1`
+- body использует тот же бинарный формат line-текста, что и `TEXT_POST`: line-поля + `textLen` + UTF-8 текст.
+
+Блок пишется только в линию канала владельца. В обычной ленте сообщений он не отображается как пользовательский пост.
+
+## Текстовый формат
+
+В начале текста могут идти технические теги, после них обычный текст описания:
+
+```text
+<SHiNE:title;v=1;Название канала>
+<SHiNE:avatar;v=1;size=248193;sha256=3f2c8a...;ar=AbCdEf...>
+Описание канала.
+```
+
+Поддерживаемые теги:
+
+- `<SHiNE:title;v=1;...>` — человекочитаемое имя канала.
+- `<SHiNE:avatar;v=1;size=...;sha256=...;ar=...>` — аватар канала в Arweave.
+
+## Правила
+
+- Каждый `TEXT_CHANNEL_META` задаёт полный снимок состояния профиля канала.
+- Старые meta-блоки остаются в блокчейне как история, но текущее состояние берётся из последнего валидного meta-блока.
+- Если `title` отсутствует, используется техническое имя канала.
+- Если `avatar` отсутствует, аватар считается сброшенным.
+- Если описание после тегов отсутствует, описание считается пустым.
+- `meta_updated_at_ms` равен времени самого валидного meta-блока.
+
+## Ограничения
+
+- Длина `title` — максимум 50 Unicode code points.
+- В `title` запрещены `<`, `>`, `;`, табуляция, перевод строки и `\0`.
+- Длина описания — максимум 250 Unicode code points.
+- `avatar.ar` — Arweave transaction id из 43 символов.
+- `avatar.sha256` — 64 hex-символа.
+- `avatar.size` — положительный размер файла в байтах.
+
+Если meta-блок невалиден, сервер не применяет его целиком.
+
+## UI
+
+- При создании канала UI может сразу после `TECH_CREATE_CHANNEL` записать первый `TEXT_CHANNEL_META` с человекочитаемым именем, аватаром и описанием.
+- При создании канала UI показывает системную карточку `Создан канал ...`.
+- При записи `TEXT_CHANNEL_META` UI показывает системную карточку `Изменён профиль канала`.
+- У системных карточек нет лайка, ответа, репоста, редактирования и других действий обычного сообщения.
+- По клику на системную карточку показываются аватар, человекочитаемое имя и описание на момент этого события.
+
+## Замена старых команд
+
+Команда `/.desc` больше не используется и не применяется сервером. Описание канала меняется только через `TEXT_CHANNEL_META`.

docs/Blockchain/CHANGELOG.md

@@ -113,6 +113,14 @@
 - В `11_TEXT_Blocks.md` зафиксировано, что запись `TEXT_REPOST` временно не используется до будущей реализации.
 - В `docs/API/04_Add_Block_to_Blockchain_API.md` добавлен код отказа `repost_disabled`.
 
+## 2026-08-01 01:45:29 +0400
+- Базовый коммит-ориентир: `24afcba`.
+- Добавлен новый `TEXT`-подтип `TEXT_CHANNEL_META (subType=70)` для скрытого технического снимка профиля канала.
+- Зафиксирован формат тегов `<SHiNE:title;v=1;...>` и `<SHiNE:avatar;v=1;size=...;sha256=...;ar=...>`; описание хранится хвостовым UTF-8 текстом.
+- UI создания канала может сразу после `TECH_CREATE_CHANNEL` записать первый `TEXT_CHANNEL_META` с человекочитаемым именем, описанием и аватаром.
+- Команда `/.desc` удалена из актуальной модели изменения описания канала; профиль канала меняется только через `TEXT_CHANNEL_META`.
+- API чтения каналов расширен полями `displayName`, `avaAr`, `avaSha256`, `avaSize`, `metaUpdatedAtMs` и списком `metaEvents`.
+
 ## 2026-07-31 17:40:31 +0400
 - Базовый коммит-ориентир: `d640dd6`.
 - Формат блокчейна не менялся.

docs/Blockchain/README.md

@@ -19,11 +19,13 @@
    Параметры пользователя (`msg_type=4`).
 8. [15_TEXT_Attachments.md](./15_TEXT_Attachments.md)
    Вложения в TEXT-сообщениях через `SHiNE:attach v=1`.
-9. [01_Channel_Types_and_CreateChannel.md](./01_Channel_Types_and_CreateChannel.md)
+9. [16_TEXT_Channel_Meta.md](./16_TEXT_Channel_Meta.md)
+   Скрытый `TEXT_CHANNEL_META` для профиля канала.
+10. [01_Channel_Types_and_CreateChannel.md](./01_Channel_Types_and_CreateChannel.md)
    Типы каналов и формат `CreateChannelBody`.
-10. [02_Channel_Commands.md](./02_Channel_Commands.md)
+11. [02_Channel_Commands.md](./02_Channel_Commands.md)
    Команды в текстовых сообщениях каналов.
-11. [CHANGELOG.md](./CHANGELOG.md)
+12. [CHANGELOG.md](./CHANGELOG.md)
     Журнал изменений документации.
 
 ## Смежная документация

shine-UI/js/components/arweave-attachment-manager.js

@@ -16,8 +16,10 @@ const RECENT_UPLOAD_MS = 20 * 60 * 1000;
 function normalizeHistoryItem(input = {}) {
   const item = normalizeAttachment(input);
   const placedInShineAtMs = Number(input.placedInShineAtMs || 0) || 0;
+  const purpose = String(input.purpose || '').trim() === 'avatar' ? 'avatar' : 'attachment';
   return {
     ...item,
+    purpose,
     pendingPlacement: input.pendingPlacement === true && !placedInShineAtMs,
     placedInShineAtMs,
   };
@@ -133,6 +135,36 @@ function shortAddress(value) {
   return `${raw.slice(0, 8)}...${raw.slice(-6)}`;
 }
 
+async function resizeImageFileToAvatar(file) {
+  const source = file instanceof File ? file : null;
+  if (!source) throw new Error('Выберите изображение.');
+  const dataUrl = await new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => resolve(String(reader.result || ''));
+    reader.onerror = () => reject(new Error('Не удалось прочитать изображение.'));
+    reader.readAsDataURL(source);
+  });
+  const image = await new Promise((resolve, reject) => {
+    const img = new Image();
+    img.onload = () => resolve(img);
+    img.onerror = () => reject(new Error('Не удалось открыть изображение.'));
+    img.src = dataUrl;
+  });
+  const side = Math.min(image.naturalWidth || image.width, image.naturalHeight || image.height);
+  if (!side || side <= 0) throw new Error('Некорректный размер изображения.');
+  const canvas = document.createElement('canvas');
+  canvas.width = 512;
+  canvas.height = 512;
+  const ctx = canvas.getContext('2d');
+  if (!ctx) throw new Error('Canvas недоступен.');
+  const sx = Math.max(0, ((image.naturalWidth || image.width) - side) / 2);
+  const sy = Math.max(0, ((image.naturalHeight || image.height) - side) / 2);
+  ctx.drawImage(image, sx, sy, side, side, 0, 0, 512, 512);
+  const blob = await new Promise((resolve) => canvas.toBlob(resolve, 'image/jpeg', 0.9));
+  if (!blob) throw new Error('Не удалось сжать аватар.');
+  return new File([blob], 'avatar.jpg', { type: 'image/jpeg', lastModified: Date.now() });
+}
+
 export function openArweaveAttachmentManager({
   login,
   storagePwd,
@@ -140,6 +172,8 @@ export function openArweaveAttachmentManager({
   onSelect,
   selectedTxIds = [],
   historyOnly = false,
+  mode = 'attachment',
+  historyPurpose = '',
 } = {}) {
   const cleanLogin = String(login || '').trim();
   const cleanStoragePwd = String(storagePwd || '').trim();
@@ -158,6 +192,8 @@ export function openArweaveAttachmentManager({
   let priceInfo = null;
   let balanceInfo = null;
   let autoOpenedFileDialog = false;
+  const isAvatarMode = String(mode || '') === 'avatar';
+  const purposeFilter = isAvatarMode || String(historyPurpose || '').trim() === 'avatar' ? 'avatar' : '';
   const selectedTxIdSet = new Set((Array.isArray(selectedTxIds) ? selectedTxIds : []).map((item) => String(item || '').trim()).filter(Boolean));
 
   function selectedWallet() {
@@ -207,18 +243,18 @@ export function openArweaveAttachmentManager({
       root.innerHTML = `
         <div class="modal" data-ar-attach-modal="true">
           <div class="modal-card stack ar-attachment-manager-card">
-            <h3 class="modal-title">${historyOnly ? 'Загрузить файл в блокчейн' : 'Добавить вложение'}</h3>
+            <h3 class="modal-title">${isAvatarMode ? 'Загрузить аватар' : (historyOnly ? 'Загрузить файл в блокчейн' : 'Добавить вложение')}</h3>
             <label class="meta-muted" for="ar-attach-wallet">Кошелёк оплаты Arweave</label>
             <select class="input" id="ar-attach-wallet"></select>
             <button class="ghost-btn" type="button" data-action="add-wallet">Добавить кошелёк</button>
-            ${historyOnly ? '' : '<p class="meta-muted">Для надёжности лучше сначала загрузить файл в Arweave, дождаться доступности в журнале, а потом добавить его из истории загрузок.</p>'}
+            ${isAvatarMode ? '<p class="meta-muted">Выберите изображение. Перед загрузкой оно будет сжато до 512×512 и сохранено в истории как аватар.</p>' : (historyOnly ? '' : '<p class="meta-muted">Для надёжности лучше сначала загрузить файл в Arweave, дождаться доступности в журнале, а потом добавить его из истории загрузок.</p>')}
             <label class="meta-muted" for="ar-attach-file">Файл для загрузки</label>
-            <input class="input" id="ar-attach-file" type="file" />
+            <input class="input" id="ar-attach-file" type="file" ${isAvatarMode ? 'accept="image/*"' : ''} />
             <div class="ar-attachment-meta" data-meta="true"></div>
             <p class="meta-muted inline-error" data-error="true"></p>
             <div class="form-actions-grid">
-              ${historyOnly ? '' : '<button class="secondary-btn" type="button" data-action="existing">Ввести txId</button>'}
-              ${historyOnly ? '' : '<button class="secondary-btn" type="button" data-action="history">История загрузок</button>'}
+              ${historyOnly || isAvatarMode ? '' : '<button class="secondary-btn" type="button" data-action="existing">Ввести txId</button>'}
+              ${historyOnly ? '' : `<button class="secondary-btn" type="button" data-action="history">${isAvatarMode ? 'История аватаров' : 'История загрузок'}</button>`}
               <button class="primary-btn" type="button" data-action="upload" disabled>${historyOnly ? 'Загрузить в журнал' : 'Загрузить'}</button>
             </div>
             <button class="secondary-btn" type="button" data-action="cancel">Отмена</button>
@@ -266,13 +302,19 @@ export function openArweaveAttachmentManager({
         try {
           const wallet = selectedWallet();
           if (!wallet?.address) throw new Error('Выберите Arweave-кошелёк.');
+          if (isAvatarMode && !String(selectedFile.type || '').startsWith('image/')) {
+            throw new Error('Для аватара можно выбрать только изображение.');
+          }
+          if (isAvatarMode) {
+            selectedFile = await resizeImageFileToAvatar(selectedFile);
+          }
           const buffer = await selectedFile.arrayBuffer();
           selectedSha256 = await sha256HexFromArrayBuffer(buffer);
           priceInfo = await getArweaveUploadPrice({ gateway: cleanGateway, byteLength: selectedFile.size });
           balanceInfo = await getArweaveBalance({ gateway: cleanGateway, address: wallet.address });
           const hasFunds = BigInt(balanceInfo.winston) >= BigInt(priceInfo.winston);
           metaEl.innerHTML = `
-            <div>Имя: ${escapeHtml(selectedFile.name || 'file')}</div>
+            ${isAvatarMode ? '' : `<div>Имя: ${escapeHtml(selectedFile.name || 'file')}</div>`}
             <div>Размер: ${escapeHtml(formatBytes(selectedFile.size))}</div>
             <div>SHA-256: ${escapeHtml(selectedSha256)}</div>
             <div>Цена: ${escapeHtml(Number(priceInfo.ar).toLocaleString('ru-RU', { maximumFractionDigits: 6 }))} AR</div>
@@ -305,19 +347,20 @@ export function openArweaveAttachmentManager({
             gateway: cleanGateway,
             jwk: wallet.jwk,
             file: selectedFile,
-            shineType: 'attachment',
+            shineType: isAvatarMode ? 'avatar' : 'attachment',
             tags: [
               { name: 'SHiNE-Login', value: cleanLogin },
-              { name: 'SHiNE-Attachment-Name', value: selectedFile.name || 'file' },
+              { name: isAvatarMode ? 'SHiNE-Avatar' : 'SHiNE-Attachment-Name', value: isAvatarMode ? '1' : (selectedFile.name || 'file') },
             ],
           });
           finish(resolve, {
-            name: selectedFile.name || 'file',
+            name: isAvatarMode ? 'Аватар' : (selectedFile.name || 'file'),
             size: selectedFile.size,
             sha256: selectedSha256,
             ar: uploaded.id,
             uploadedAtMs: Date.now(),
-          }, { pendingPlacement: historyOnly });
+            purpose: isAvatarMode ? 'avatar' : 'attachment',
+          }, { pendingPlacement: historyOnly && !isAvatarMode });
         } catch (error) {
           uploadBtn.disabled = false;
           setText(errorEl, error?.message || 'Не удалось загрузить файл в Arweave.');
@@ -394,7 +437,10 @@ export function openArweaveAttachmentManager({
     };
 
     const showHistory = () => {
-      const rows = readArweaveAttachmentHistory(cleanLogin).slice().reverse();
+      const rows = readArweaveAttachmentHistory(cleanLogin)
+        .filter((item) => !purposeFilter || item.purpose === purposeFilter)
+        .slice()
+        .reverse();
       root.innerHTML = `
         <div class="modal" data-ar-attach-modal="true">
           <div class="modal-card stack ar-attachment-manager-card ar-attachment-manager-card--wide">
@@ -405,7 +451,7 @@ export function openArweaveAttachmentManager({
                 const isSelected = selectedTxIdSet.has(item.ar);
                 return `
                   <article class="ar-attachment-history-tile${isSelected ? ' is-selected' : ''}" data-history-tile="${index}">
-                    <strong class="ar-attachment-history-name">${escapeHtml(item.name)}</strong>
+                    <strong class="ar-attachment-history-name">${escapeHtml(item.name)}${item.purpose === 'avatar' ? ' · аватар' : ''}</strong>
                     <div class="ar-attachment-history-meta-row">
                       <span>${escapeHtml(formatBytes(item.size))}</span>
                       <span>${escapeHtml(formatArweaveHistoryTime(item.uploadedAtMs))}</span>

shine-UI/js/pages/add-channel-view.js

@@ -3,10 +3,11 @@ import { authService, state } from '../state.js';
 import { toUserMessage } from '../services/ui-error-texts.js';
 import {
   channelNameErrorText,
-  normalizeChannelDescription,
   normalizeChannelDisplayName,
   validateChannelDisplayName,
 } from '../services/channel-name-rules.js';
+import { openArweaveAttachmentManager, markArweaveAttachmentPlaced } from '../components/arweave-attachment-manager.js';
+import { buildArweaveDataUrl } from '../services/arweave-file-service.js';
 
 export const pageMeta = { id: 'add-channel-view', title: 'Создать канал' };
 
@@ -21,13 +22,30 @@ function persistCreateSuccessFlash(message) {
   }
 }
 
-function validateDescription(value) {
-  const normalized = normalizeChannelDescription(value);
-  const bytes = new TextEncoder().encode(normalized).length;
-  if (bytes > 200) {
-    return { ok: false, normalized, bytes, error: 'Описание слишком длинное: максимум 200 байт UTF-8.' };
+function normalizeMetaText(value, max, label) {
+  const normalized = String(value || '').trim();
+  const length = Array.from(normalized).length;
+  if (length > max) {
+    return { ok: false, normalized, length, error: `${label}: максимум ${max} символов.` };
   }
-  return { ok: true, normalized, bytes, error: '' };
+  return { ok: true, normalized, length, error: '' };
+}
+
+function renderAvatarPreview(slot, avatar, title) {
+  if (!slot) return;
+  slot.innerHTML = '';
+  const wrap = document.createElement('div');
+  wrap.className = 'channel-profile-avatar';
+  wrap.style.setProperty('--channel-avatar-size', '82px');
+  if (avatar?.ar) {
+    const img = document.createElement('img');
+    img.alt = 'Аватар канала';
+    img.src = buildArweaveDataUrl({ gateway: state.entrySettings.arweaveServer, txId: avatar.ar });
+    wrap.append(img);
+  } else {
+    wrap.textContent = String(title || 'К').trim().slice(0, 1).toUpperCase() || 'К';
+  }
+  slot.append(wrap);
 }
 
 export function render({ navigate }) {
@@ -50,13 +68,21 @@ export function render({ navigate }) {
     <p class="channel-head-meta">Можно использовать большие и маленькие буквы, но уникальность проверяется без учёта регистра.</p>
     <div class="meta-muted">Тип канала фиксирован: публичный (1).</div>
 
-    <label for="channel-name">Название канала</label>
+    <label for="channel-name">Техническое имя канала</label>
     <input id="channel-name" class="input" maxlength="32" placeholder="Например: My-Channel_1" required />
     <div id="channel-name-error" class="meta-muted inline-error"></div>
 
+    <label for="channel-title">Человекочитаемое имя</label>
+    <input id="channel-title" class="input" maxlength="50" placeholder="Например: Мой красивый канал" />
+    <div class="meta-muted" id="channel-title-counter">0 / 50 символов</div>
+    <div id="channel-title-error" class="meta-muted inline-error"></div>
+
+    <div id="channel-avatar-preview"></div>
+    <button type="button" class="secondary-btn" id="channel-avatar-btn">Выбрать аватар</button>
+
     <label for="channel-description">Описание канала (необязательно)</label>
-    <textarea id="channel-description" class="input" rows="4" maxlength="400" placeholder="Коротко о канале, до 200 байт UTF-8"></textarea>
-    <div class="meta-muted" id="channel-description-counter">0 / 200 байт</div>
+    <textarea id="channel-description" class="input" rows="4" maxlength="250" placeholder="Коротко о канале, до 250 символов"></textarea>
+    <div class="meta-muted" id="channel-description-counter">0 / 250 символов</div>
     <div id="channel-description-error" class="meta-muted inline-error"></div>
 
     <div id="channel-create-error" class="meta-muted inline-error"></div>
@@ -67,8 +93,13 @@ export function render({ navigate }) {
   `;
 
   const nameEl = form.querySelector('#channel-name');
+  const titleEl = form.querySelector('#channel-title');
   const descriptionEl = form.querySelector('#channel-description');
+  const avatarPreviewEl = form.querySelector('#channel-avatar-preview');
+  const avatarBtn = form.querySelector('#channel-avatar-btn');
   const nameErrorEl = form.querySelector('#channel-name-error');
+  const titleErrorEl = form.querySelector('#channel-title-error');
+  const titleCounterEl = form.querySelector('#channel-title-counter');
   const descriptionErrorEl = form.querySelector('#channel-description-error');
   const descriptionCounterEl = form.querySelector('#channel-description-counter');
   const errorEl = form.querySelector('#channel-create-error');
@@ -76,38 +107,60 @@ export function render({ navigate }) {
   const cancelEl = form.querySelector('#cancel-create-channel');
 
   let submitInFlight = false;
+  let selectedAvatar = null;
 
   const setBusy = (busy) => {
     submitInFlight = !!busy;
     submitEl.disabled = submitInFlight;
     cancelEl.disabled = submitInFlight;
     nameEl.disabled = submitInFlight;
+    titleEl.disabled = submitInFlight;
     descriptionEl.disabled = submitInFlight;
+    avatarBtn.disabled = submitInFlight;
     submitEl.textContent = submitInFlight ? 'Создаём...' : 'Создать';
   };
 
   const updateValidation = () => {
     const nameCheck = validateChannelDisplayName(nameEl.value);
-    const descriptionCheck = validateDescription(descriptionEl.value);
+    const titleCheck = normalizeMetaText(titleEl.value, 50, 'Название');
+    const descriptionCheck = normalizeMetaText(descriptionEl.value, 250, 'Описание');
 
     nameErrorEl.textContent = nameCheck.ok ? '' : channelNameErrorText(nameCheck.code);
+    titleErrorEl.textContent = titleCheck.error;
     descriptionErrorEl.textContent = descriptionCheck.error;
 
-    const descLength = Number(descriptionCheck.bytes || 0);
-    descriptionCounterEl.textContent = `${descLength} / 200 байт`;
+    titleCounterEl.textContent = `${Number(titleCheck.length || 0)} / 50 символов`;
+    descriptionCounterEl.textContent = `${Number(descriptionCheck.length || 0)} / 250 символов`;
 
-    const ok = nameCheck.ok && descriptionCheck.ok;
+    const ok = nameCheck.ok && titleCheck.ok && descriptionCheck.ok;
     submitEl.disabled = submitInFlight || !ok;
+    renderAvatarPreview(avatarPreviewEl, selectedAvatar, titleCheck.normalized || nameCheck.normalized);
 
     return {
       ok,
       name: nameCheck.normalized,
+      title: titleCheck.normalized,
       description: descriptionCheck.normalized,
     };
   };
 
   nameEl.addEventListener('input', updateValidation);
+  titleEl.addEventListener('input', updateValidation);
   descriptionEl.addEventListener('input', updateValidation);
+  avatarBtn.addEventListener('click', async () => {
+    try {
+      selectedAvatar = await openArweaveAttachmentManager({
+        login: state.session.login,
+        storagePwd: state.session.storagePwdInMemory,
+        gateway: state.entrySettings.arweaveServer,
+        mode: 'avatar',
+        historyPurpose: 'avatar',
+      });
+      updateValidation();
+    } catch (error) {
+      errorEl.textContent = toUserMessage(error, 'Не удалось выбрать аватар.');
+    }
+  });
 
   form.addEventListener('submit', async (event) => {
     event.preventDefault();
@@ -127,14 +180,25 @@ export function render({ navigate }) {
     errorEl.textContent = '';
 
     try {
-      await authService.addBlockCreateChannel({
+      const createResult = await authService.addBlockCreateChannel({
         login,
         storagePwd,
         channelName: normalizeChannelDisplayName(check.name),
-        channelDescription: normalizeChannelDescription(check.description),
+        channelDescription: '',
         channelType: CHANNEL_TYPE_PUBLIC,
         channelTypeVersion: 1,
       });
+      if (check.title || check.description || selectedAvatar?.ar) {
+        await authService.addBlockChannelMeta({
+          login,
+          storagePwd,
+          channel: createResult.channel,
+          title: check.title,
+          description: check.description,
+          avatar: selectedAvatar,
+        });
+        if (selectedAvatar?.ar) markArweaveAttachmentPlaced(login, selectedAvatar);
+      }
 
       persistCreateSuccessFlash(`Канал "${normalizeChannelDisplayName(check.name)}" создан.`);
       navigate('channels-list');

shine-UI/js/pages/channel-view.js

@@ -32,6 +32,7 @@ import {
   makeProfileRoute,
   makeShineMessageRoute,
 } from '../services/shine-routes.js';
+import { buildArweaveDataUrl } from '../services/arweave-file-service.js';
 
 export const pageMeta = { id: 'channel-view', title: 'Канал' };
 const CHANNEL_TYPE_STORIES = 0;
@@ -286,22 +287,144 @@ function resolveMessageTimestampMs(message) {
   );
 }
 
-function openAboutChannelModal(channel) {
+function createChannelAvatarElement(channel, size = 72) {
+  const wrap = document.createElement('div');
+  wrap.className = 'channel-profile-avatar';
+  wrap.style.setProperty('--channel-avatar-size', `${size}px`);
+  const txId = String(channel?.avaAr || '').trim();
+  if (txId) {
+    const img = document.createElement('img');
+    img.alt = 'Аватар канала';
+    img.src = buildArweaveDataUrl({ gateway: state.entrySettings.arweaveServer, txId });
+    wrap.append(img);
+  } else {
+    wrap.textContent = String(channel?.displayTitle || channel?.name || 'К').trim().slice(0, 1).toUpperCase() || 'К';
+  }
+  return wrap;
+}
+
+function openChannelMetaDetailsModal({ title = 'Данные канала', channel = {}, canEdit = false, onEdit = null } = {}) {
   const root = document.getElementById('modal-root');
   root.innerHTML = `
     <div class="modal" id="about-channel-modal">
-      <div class="modal-card stack">
-        <h3 class="modal-title">О канале</h3>
-        <p><strong>${channel.displayName || channel.name}</strong></p>
-        <p class="meta-muted">${channel.description || 'Описание не задано.'}</p>
+      <div class="modal-card stack channel-profile-card">
+        <div class="channel-profile-modal-head">
+          <h3 class="modal-title">${escapeHtml(title)}</h3>
+          ${canEdit ? '<button class="secondary-btn channel-profile-edit-btn" id="about-channel-edit" type="button" title="Изменить">✏️</button>' : ''}
+        </div>
+        <div id="about-channel-avatar-slot"></div>
+        <p><strong>${escapeHtml(channel.displayTitle || channel.displayName || channel.name)}</strong></p>
+        <p class="meta-muted">${escapeHtml(`${channel.ownerName || 'автор'} / ${channel.name || 'channel'}`)}</p>
+        <p class="meta-muted">${escapeHtml(channel.description || 'Описание не задано.')}</p>
         <button class="secondary-btn" id="about-channel-close" type="button">Закрыть</button>
       </div>
     </div>
   `;
+  root.querySelector('#about-channel-avatar-slot')?.append(createChannelAvatarElement(channel, 86));
 
   root.querySelector('#about-channel-close')?.addEventListener('click', () => {
     root.innerHTML = '';
   });
+  root.querySelector('#about-channel-edit')?.addEventListener('click', () => {
+    root.innerHTML = '';
+    if (typeof onEdit === 'function') onEdit();
+  });
+}
+
+function openAboutChannelModal(channel, options = {}) {
+  openChannelMetaDetailsModal({
+    title: 'О канале',
+    channel,
+    canEdit: options.canEdit === true,
+    onEdit: options.onEdit,
+  });
+}
+
+function openEditChannelModal({ channel, onSave }) {
+  const root = document.getElementById('modal-root');
+  let selectedAvatar = channel?.avaAr ? {
+    name: 'Аватар',
+    ar: channel.avaAr,
+    sha256: channel.avaSha256,
+    size: channel.avaSize,
+    purpose: 'avatar',
+  } : null;
+
+  const renderAvatarPreview = () => {
+    const slot = root.querySelector('#edit-channel-avatar-preview');
+    if (!slot) return;
+    slot.innerHTML = '';
+    slot.append(createChannelAvatarElement({
+      ...channel,
+      avaAr: selectedAvatar?.ar || '',
+      displayTitle: root.querySelector('#edit-channel-title')?.value || channel.displayTitle,
+    }, 86));
+  };
+
+  root.innerHTML = `
+    <div class="modal" id="edit-channel-modal">
+      <div class="modal-card stack channel-profile-card">
+        <h3 class="modal-title">Изменение канала</h3>
+        <div id="edit-channel-avatar-preview"></div>
+        <button class="secondary-btn" id="edit-channel-avatar" type="button">Выбрать аватар</button>
+        <label class="meta-muted" for="edit-channel-title">Человекочитаемое имя</label>
+        <input class="input" id="edit-channel-title" type="text" maxlength="50" value="${escapeHtml(channel.displayTitle || channel.name || '')}" />
+        <label class="meta-muted" for="edit-channel-description">Описание</label>
+        <textarea class="input" id="edit-channel-description" rows="4" maxlength="250">${escapeHtml(channel.description || '')}</textarea>
+        <p class="meta-muted inline-error" id="edit-channel-error"></p>
+        <div class="form-actions-grid">
+          <button class="secondary-btn" id="edit-channel-cancel" type="button">Отмена</button>
+          <button class="primary-btn" id="edit-channel-save" type="button">Сохранить</button>
+        </div>
+      </div>
+    </div>
+  `;
+  renderAvatarPreview();
+
+  root.querySelector('#edit-channel-cancel')?.addEventListener('click', () => {
+    root.innerHTML = '';
+  });
+  root.querySelector('#edit-channel-title')?.addEventListener('input', renderAvatarPreview);
+  root.querySelector('#edit-channel-avatar')?.addEventListener('click', async () => {
+    try {
+      const item = await openArweaveAttachmentManager({
+        login: state.session.login,
+        storagePwd: state.session.storagePwdInMemory,
+        gateway: state.entrySettings.arweaveServer,
+        mode: 'avatar',
+        historyPurpose: 'avatar',
+      });
+      if (!item) return;
+      selectedAvatar = item;
+      renderAvatarPreview();
+    } catch (error) {
+      const errorEl = root.querySelector('#edit-channel-error');
+      if (errorEl) errorEl.textContent = toUserMessage(error, 'Не удалось выбрать аватар.');
+    }
+  });
+  root.querySelector('#edit-channel-save')?.addEventListener('click', async () => {
+    const saveBtn = root.querySelector('#edit-channel-save');
+    const errorEl = root.querySelector('#edit-channel-error');
+    const title = String(root.querySelector('#edit-channel-title')?.value || '').trim();
+    const description = String(root.querySelector('#edit-channel-description')?.value || '').trim();
+    if (Array.from(title).length > 50) {
+      if (errorEl) errorEl.textContent = 'Название: максимум 50 символов.';
+      return;
+    }
+    if (Array.from(description).length > 250) {
+      if (errorEl) errorEl.textContent = 'Описание: максимум 250 символов.';
+      return;
+    }
+    saveBtn.disabled = true;
+    if (errorEl) errorEl.textContent = '';
+    try {
+      await onSave({ title, description, avatar: selectedAvatar });
+      root.innerHTML = '';
+    } catch (error) {
+      saveBtn.disabled = false;
+      if (errorEl) errorEl.textContent = toUserMessage(error, 'Не удалось изменить канал.');
+    }
+  });
 }
 
 function bindSubmitOnPlainEnter(textarea, submit) {
@@ -941,11 +1064,17 @@ async function loadFromApi(route, channelId) {
   return {
     channel: {
       name: payload.channel?.channelName || 'неизвестный канал',
+      displayTitle: String(payload.channel?.displayName || payload.channel?.channelName || 'неизвестный канал').trim(),
       displayName: `${ownerLogin || 'неизвестно'}/${payload.channel?.channelName || 'неизвестный канал'}`,
       description: String(payload.channel?.channelDescription || '').trim(),
+      avaAr: String(payload.channel?.avaAr || '').trim(),
+      avaSha256: String(payload.channel?.avaSha256 || '').trim(),
+      avaSize: Number(payload.channel?.avaSize || 0),
+      metaUpdatedAtMs: Number(payload.channel?.metaUpdatedAtMs || 0),
       ownerName: ownerLogin || 'неизвестно',
     },
     posts,
+    metaEvents: Array.isArray(payload?.metaEvents) ? payload.metaEvents : [],
     reverseChannelMissingWarning,
     isOwnChannel,
     isSubscribed,
@@ -1033,6 +1162,48 @@ function applyPendingScroll(screen, routeKey, forceBottom = false) {
   setTimeout(doScroll, 20);
 }
 
+function mapChannelMetaEvent(event, fallbackChannel) {
+  return {
+    kind: String(event?.kind || '').trim(),
+    messageRef: event?.messageRef || null,
+    timestampMs: Number(event?.createdAtMs || 0),
+    title: String(event?.title || fallbackChannel?.displayTitle || fallbackChannel?.name || '').trim(),
+    description: String(event?.description || '').trim(),
+    avaAr: String(event?.avaAr || '').trim(),
+    avaSha256: String(event?.avaSha256 || '').trim(),
+    avaSize: Number(event?.avaSize || 0),
+    ownerName: fallbackChannel?.ownerName || '',
+    name: fallbackChannel?.name || '',
+  };
+}
+
+function renderChannelMetaEventCard(event) {
+  const card = document.createElement('article');
+  card.className = 'card channel-system-event-card';
+  const label = event.kind === 'created'
+    ? `Создан канал ${event.title || event.name || ''}`.trim()
+    : 'Изменён профиль канала';
+  card.innerHTML = `
+    <span>${escapeHtml(label)}</span>
+    <small>${escapeHtml(event.timestampMs ? new Date(event.timestampMs).toLocaleString('ru-RU') : '')}</small>
+  `;
+  card.addEventListener('click', () => {
+    openChannelMetaDetailsModal({
+      title: event.kind === 'created' ? 'Канал создан' : 'Профиль канала изменён',
+      channel: {
+        name: event.name,
+        displayTitle: event.title,
+        description: event.description,
+        avaAr: event.avaAr,
+        avaSha256: event.avaSha256,
+        avaSize: event.avaSize,
+        ownerName: event.ownerName,
+      },
+    });
+  });
+  return card;
+}
+
 function renderPostCard(post, {
   navigate,
   selector,
@@ -1303,10 +1474,34 @@ function renderBody(screen, navigate, routeKey, channelData, handlers) {
   const feed = document.createElement('div');
   feed.className = 'stack channel-feed';
   const postsByKey = new Map();
+  const metaEvents = (Array.isArray(channelData.metaEvents) ? channelData.metaEvents : [])
+    .map((event) => mapChannelMetaEvent(event, channelData.channel));
+  const feedItems = [
+    ...metaEvents.map((event) => ({
+      type: 'meta',
+      timestampMs: event.timestampMs,
+      blockNumber: Number(event?.messageRef?.blockNumber || 0),
+      event,
+    })),
+    ...channelData.posts.map((post) => ({
+      type: 'post',
+      timestampMs: post.timestampMs,
+      blockNumber: Number(post?.messageRef?.blockNumber || 0),
+      post,
+    })),
+  ].sort((a, b) => {
+    const byTime = Number(a.timestampMs || 0) - Number(b.timestampMs || 0);
+    if (byTime !== 0) return byTime;
+    return Number(a.blockNumber || 0) - Number(b.blockNumber || 0);
+  });
 
-  if (channelData.posts.length) {
-    channelData.posts.forEach((post) => {
-      const row = renderPostCard(post, {
+  if (feedItems.length) {
+    feedItems.forEach((item) => {
+      if (item.type === 'meta') {
+        feed.append(renderChannelMetaEventCard(item.event));
+        return;
+      }
+      const row = renderPostCard(item.post, {
         navigate,
         selector: channelData.selector,
         onToggleLike: handlers.onToggleLike,
@@ -1315,9 +1510,9 @@ function renderBody(screen, navigate, routeKey, channelData, handlers) {
         onShare: handlers.onShare,
         onEdit: handlers.onEdit,
       });
-      const key = messageRefKey(post.messageRef);
+      const key = messageRefKey(item.post.messageRef);
       if (key) {
-        postsByKey.set(key, post);
+        postsByKey.set(key, item.post);
       }
       feed.append(row);
     });
@@ -1565,6 +1760,25 @@ export function render({ navigate, route }) {
     rerender();
   };
 
+  const onEditChannelMeta = async ({ title, description, avatar }) => {
+    const { login, storagePwd } = requireSigningSession();
+    if (!activeSelector?.ownerBlockchainName || activeSelector.channelRootBlockNumber == null) {
+      throw new Error('Идентификатор канала не готов.');
+    }
+    await authService.addBlockChannelMeta({
+      login,
+      storagePwd,
+      channel: activeSelector,
+      title,
+      description,
+      avatar,
+    });
+    if (avatar?.ar) markArweaveAttachmentPlaced(login, avatar);
+    softHaptic(12);
+    showToast('Профиль канала обновлён');
+    rerender();
+  };
+
   screen.append(header);
   screen.append(statusBox);
 
@@ -1576,14 +1790,19 @@ export function render({ navigate, route }) {
     try {
       const apiData = await loadFromApi(route, channelId);
       activeSelector = apiData?.selector || null;
-      const channelRouteLabel = `Канал: ${apiData?.channel?.ownerName || 'owner'} / ${apiData?.channel?.name || 'channel'}`;
-      const ownChannelLabel = `Ваш канал: ${apiData?.channel?.name || 'channel'}`;
+      const titleLabel = apiData?.channel?.displayTitle || apiData?.channel?.name || 'channel';
       if (channelHeaderButton) {
-        channelHeaderButton.textContent = apiData?.isOwnChannel ? ownChannelLabel : channelRouteLabel;
+        channelHeaderButton.textContent = titleLabel;
         channelHeaderButton.disabled = false;
         channelHeaderButton.onclick = (event) => {
           animatePress(event.currentTarget);
-          openAboutChannelModal(apiData.channel);
+          openAboutChannelModal(apiData.channel, {
+            canEdit: apiData?.isOwnChannel === true,
+            onEdit: () => openEditChannelModal({
+              channel: apiData.channel,
+              onSave: onEditChannelMeta,
+            }),
+          });
         };
       }
       skeleton.remove();

shine-UI/js/pages/channels-list.js

@@ -13,6 +13,7 @@ import {
 } from '../services/channels-ux.js';
 import { makeShineChannelRoute } from '../services/shine-routes.js';
 import { navigateBack } from '../router.js';
+import { buildArweaveDataUrl } from '../services/arweave-file-service.js';
 
 export const pageMeta = { id: 'channels-list', title: 'Каналы' };
 
@@ -652,11 +653,13 @@ function mapApiChannelRow(summary, bucketKey, idx, index, notificationsState) {
 
   const ownerLogin = summary?.channel?.ownerLogin || 'неизвестно';
   const channelName = summary?.channel?.channelName || '(без названия)';
+  const displayTitle = String(summary?.channel?.displayName || channelName).trim();
   const channelDescription = String(summary?.channel?.channelDescription || '').trim();
   const channelTypeCode = Number(summary?.channel?.channelTypeCode ?? 1);
   const channelTypeVersion = Number(summary?.channel?.channelTypeVersion ?? 1);
   const isOwn = bucketKey === 'own';
-  const title = `${ownerLogin} / ${channelName}`;
+  const title = displayTitle || channelName;
+  const technicalLabel = `${ownerLogin} / ${channelName}`;
 
   return {
     id: rowId,
@@ -665,9 +668,12 @@ function mapApiChannelRow(summary, bucketKey, idx, index, notificationsState) {
     ownerBlockchainName: summary?.channel?.ownerBlockchainName || '',
     channelRootBlockNumber: Number(summary?.channel?.channelRoot?.blockNumber),
     channelRootBlockHash: normalizeHash(summary?.channel?.channelRoot?.blockHash),
-    avatar: avatarLetterFromName(channelName),
+    avatar: avatarLetterFromName(displayTitle || channelName),
+    avaAr: String(summary?.channel?.avaAr || '').trim(),
     title,
+    technicalLabel,
     channelName,
+    displayTitle,
     channelDescription,
     channelTypeCode,
     channelTypeVersion,
@@ -968,6 +974,10 @@ function renderChannelMain(channel) {
   title.className = 'channel-row-title';
   title.textContent = channel.title;
 
+  const technical = document.createElement('p');
+  technical.className = 'channel-row-technical';
+  technical.textContent = channel.technicalLabel || `${channel.ownerName || ''} / ${channel.channelName || ''}`;
+
   if (channel.channelDescription) {
     const desc = document.createElement('p');
     desc.className = 'channel-row-description';
@@ -983,7 +993,7 @@ function renderChannelMain(channel) {
   meta.className = 'channel-row-owner channel-counter-meta';
   meta.textContent = `Сообщений: ${channel.messagesCount || 0}`;
 
-  main.prepend(title);
+  main.prepend(title, technical);
   main.append(preview, meta);
   return main;
 }
@@ -1012,7 +1022,14 @@ function renderListContent({ screen, container, listState, navigate, refreshFeed
 
     const avatar = document.createElement('div');
     avatar.className = 'avatar';
-    avatar.textContent = channel.avatar;
+    if (channel.avaAr) {
+      const img = document.createElement('img');
+      img.alt = '';
+      img.src = buildArweaveDataUrl({ gateway: state.entrySettings.arweaveServer, txId: channel.avaAr });
+      avatar.append(img);
+    } else {
+      avatar.textContent = channel.avatar;
+    }
 
     const main = renderChannelMain(channel);
 

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

@@ -54,6 +54,7 @@ const MSG_SUBTYPE_TEXT_EDIT_POST = 11;
 const MSG_SUBTYPE_TEXT_REPLY = 20;
 const MSG_SUBTYPE_TEXT_EDIT_REPLY = 21;
 const MSG_SUBTYPE_TEXT_REPOST = 30;
+const MSG_SUBTYPE_TEXT_CHANNEL_META = 70;
 const MSG_SUBTYPE_REACTION_LIKE = 1;
 const MSG_SUBTYPE_REACTION_UNLIKE = 2;
 const MSG_SUBTYPE_CONNECTION_FOLLOW = 30;
@@ -698,6 +699,39 @@ function normalizeChannelDescription(value) {
   return text;
 }
 
+function validateChannelMetaTitle(value) {
+  const text = String(value || '').trim();
+  if (Array.from(text).length > 50) throw new Error('Название канала слишком длинное: максимум 50 символов.');
+  if (/[<>;\t\n\r\u0000]/u.test(text)) {
+    throw new Error('В названии канала нельзя использовать < > ; табуляцию и перевод строки.');
+  }
+  return text;
+}
+
+function normalizeChannelMetaDescription(value) {
+  const text = String(value == null ? '' : value).trim();
+  if (Array.from(text).length > 250) throw new Error('Описание канала слишком длинное: максимум 250 символов.');
+  return text;
+}
+
+function composeChannelMetaText({ title = '', description = '', avatar = null } = {}) {
+  const cleanTitle = validateChannelMetaTitle(title);
+  const cleanDescription = normalizeChannelMetaDescription(description);
+  const rows = [];
+  if (cleanTitle) rows.push(`<SHiNE:title;v=1;${cleanTitle}>`);
+  if (avatar?.ar) {
+    const size = Number(avatar.size || 0);
+    const sha256 = String(avatar.sha256 || '').trim().toLowerCase();
+    const ar = String(avatar.ar || '').trim();
+    if (!Number.isInteger(size) || size <= 0) throw new Error('Некорректный размер аватара.');
+    if (!/^[0-9a-f]{64}$/u.test(sha256)) throw new Error('Некорректный SHA-256 аватара.');
+    if (!/^[A-Za-z0-9_-]{43}$/u.test(ar)) throw new Error('Некорректный Arweave txId аватара.');
+    rows.push(`<SHiNE:avatar;v=1;size=${size};sha256=${sha256};ar=${ar}>`);
+  }
+  if (cleanDescription) rows.push(cleanDescription);
+  return rows.join('\n');
+}
+
 function validatePersonalChannelName(value) {
   const normalized = normalizeChannelDisplayName(value);
   if (!normalized) return { ok: false, error: 'Введите логин пользователя.' };
@@ -806,6 +840,23 @@ function makeTextPostBodyBytes({ lineCode, prevLineNumber, prevLineHashHex, this
   );
 }
 
+function makeTextLineBodyBytesAllowEmpty({ lineCode, prevLineNumber, prevLineHashHex, thisLineNumber, text }) {
+  const message = String(text || '').trim();
+  const textBytes = utf8Bytes(message);
+  if (textBytes.length > 65535) {
+    throw new Error('Message text must be 0..65535 UTF-8 bytes');
+  }
+
+  return concatBytes(
+    int32Bytes(lineCode),
+    int32Bytes(prevLineNumber),
+    hexToBytes(normalizeHex32(prevLineHashHex)),
+    int32Bytes(thisLineNumber),
+    int16Bytes(textBytes.length),
+    textBytes
+  );
+}
+
 function normalizeMessageRefTarget(target, actionName = 'action') {
   const cleanBch = String(target?.blockchainName || '').trim();
   const cleanBlockNumber = Number(target?.blockNumber);
@@ -2141,6 +2192,67 @@ export class AuthService {
     });
   }
 
+  async resolveChannelLineTail({ login, blockchainName, channel }) {
+    const selector = channel || {};
+    const ownerBlockchainName = String(selector?.ownerBlockchainName || '').trim();
+    const lineCode = Number(selector?.channelRootBlockNumber);
+    if (!ownerBlockchainName || !Number.isFinite(lineCode) || lineCode < 0) {
+      throw new Error('Invalid channel selector');
+    }
+    if (ownerBlockchainName !== blockchainName) {
+      throw new Error('Posting is allowed only to your own channels');
+    }
+
+    let rootHashHex = normalizeHex32(selector?.channelRootBlockHash, ZERO64);
+    if (rootHashHex === ZERO64) {
+      const ownChannels = await this.listOwnChannelsForBlockchain(login, blockchainName);
+      const rootChannel = ownChannels.find((item) => item.rootBlockNumber === lineCode);
+      if (!rootChannel) throw new Error('Channel root not found');
+      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', login);
+      const latestMessage = Array.isArray(latestPayload?.messages) ? latestPayload.messages[0] : null;
+      const latestMeta = (Array.isArray(latestPayload?.metaEvents) ? latestPayload.metaEvents : [])
+        .slice()
+        .sort((a, b) => Number(b?.messageRef?.blockNumber || -1) - Number(a?.messageRef?.blockNumber || -1))[0] || null;
+      const latestMessageBlock = Number(latestMessage?.messageRef?.blockNumber);
+      const latestMetaBlock = Number(latestMeta?.messageRef?.blockNumber);
+      const latest = Number.isFinite(latestMetaBlock) && (!Number.isFinite(latestMessageBlock) || latestMetaBlock > latestMessageBlock)
+        ? latestMeta
+        : latestMessage;
+      const latestBlockNumber = Number(latest?.messageRef?.blockNumber);
+      const latestBlockHash = normalizeHex32(latest?.messageRef?.blockHash, '');
+      const latestLineStep = resolveLatestLineStep(latest);
+      if (Number.isFinite(latestBlockNumber) && latestBlockNumber >= 0 && latestBlockHash) {
+        prevLineNumber = latestBlockNumber;
+        prevLineHashHex = latestBlockHash;
+        thisLineNumber = Number.isFinite(latestLineStep)
+          ? Math.max(0, latestLineStep + 1)
+          : Math.max(1, latestBlockNumber === lineCode ? 1 : 0);
+      }
+    } catch {
+      // fallback to root anchor
+    }
+
+    return {
+      ownerBlockchainName,
+      lineCode,
+      rootHashHex,
+      prevLineNumber,
+      prevLineHashHex,
+      thisLineNumber,
+    };
+  }
+
   async addBlockTextPost({ login, channel, text, storagePwd }) {
     const cleanLogin = (login || '').trim();
     if (!cleanLogin) throw new Error('Missing login');
@@ -2154,53 +2266,13 @@ export class AuthService {
       const user = await this.ensureChainInitializedForLineOps(cleanLogin, storagePwd);
       const blockchainName = String(user?.blockchainName || `${cleanLogin}-${BCH_SUFFIX}`).trim();
 
-      const ownerBlockchainName = owner;
-      const lineCode = root;
-      if (!ownerBlockchainName || !Number.isFinite(lineCode) || lineCode < 0) {
-        throw new Error('Invalid channel selector');
-      }
-      if (ownerBlockchainName !== blockchainName) {
-        throw new Error('Posting is allowed only to your own channels');
-      }
-
-      let rootHashHex = normalizeHex32(selector?.channelRootBlockHash, ZERO64);
-      if (rootHashHex === ZERO64) {
-        const ownChannels = await this.listOwnChannelsForBlockchain(cleanLogin, blockchainName);
-        const rootChannel = ownChannels.find((item) => item.rootBlockNumber === lineCode);
-        if (!rootChannel) throw new Error('Channel root not found');
-        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, '');
-        const latestLineStep = resolveLatestLineStep(latestMessage);
-        if (Number.isFinite(latestBlockNumber) && latestBlockNumber >= 0 && latestBlockHash) {
-          prevLineNumber = latestBlockNumber;
-          prevLineHashHex = latestBlockHash;
-          // Для нового POST берём следующий шаг после последнего сообщения линии.
-          thisLineNumber = Number.isFinite(latestLineStep)
-            ? Math.max(0, latestLineStep + 1)
-            : 1;
-        }
-      } catch {
-        // fallback to root anchor
-      }
+      const tail = await this.resolveChannelLineTail({ login: cleanLogin, blockchainName, channel: selector });
 
       const bodyBytes = makeTextPostBodyBytes({
-        lineCode,
-        prevLineNumber,
-        prevLineHashHex,
-        thisLineNumber,
+        lineCode: tail.lineCode,
+        prevLineNumber: tail.prevLineNumber,
+        prevLineHashHex: tail.prevLineHashHex,
+        thisLineNumber: tail.thisLineNumber,
         text: cleanText,
       });
 
@@ -2216,9 +2288,50 @@ export class AuthService {
       return {
         ...payload,
         channel: {
-          ownerBlockchainName,
-          channelRootBlockNumber: lineCode,
-          channelRootBlockHash: rootHashHex,
+          ownerBlockchainName: tail.ownerBlockchainName,
+          channelRootBlockNumber: tail.lineCode,
+          channelRootBlockHash: tail.rootHashHex,
+        },
+      };
+    });
+  }
+
+  async addBlockChannelMeta({ login, channel, title = '', description = '', avatar = null, storagePwd }) {
+    const cleanLogin = (login || '').trim();
+    if (!cleanLogin) throw new Error('Missing login');
+    const selector = channel || {};
+    const owner = String(selector?.ownerBlockchainName || '').trim();
+    const root = Number(selector?.channelRootBlockNumber);
+    const metaText = composeChannelMetaText({ title, description, avatar });
+    const key = `channel-meta:${cleanLogin}:${owner}:${root}:${metaText}`;
+
+    return this.runWriteLocked(key, async () => {
+      const user = await this.ensureChainInitializedForLineOps(cleanLogin, storagePwd);
+      const blockchainName = String(user?.blockchainName || `${cleanLogin}-${BCH_SUFFIX}`).trim();
+      const tail = await this.resolveChannelLineTail({ login: cleanLogin, blockchainName, channel: selector });
+      const bodyBytes = makeTextLineBodyBytesAllowEmpty({
+        lineCode: tail.lineCode,
+        prevLineNumber: tail.prevLineNumber,
+        prevLineHashHex: tail.prevLineHashHex,
+        thisLineNumber: tail.thisLineNumber,
+        text: metaText,
+      });
+
+      const payload = await this.addBlockSigned({
+        login: cleanLogin,
+        storagePwd,
+        msgType: MSG_TYPE_TEXT,
+        msgSubType: MSG_SUBTYPE_TEXT_CHANNEL_META,
+        msgVersion: 1,
+        bodyBytes,
+      });
+
+      return {
+        ...payload,
+        channel: {
+          ownerBlockchainName: tail.ownerBlockchainName,
+          channelRootBlockNumber: tail.lineCode,
+          channelRootBlockHash: tail.rootHashHex,
         },
       };
     });

shine-UI/styles/components.css

@@ -3884,6 +3884,66 @@ textarea.input {
   padding-bottom: 9px;
 }
 
+.channel-system-event-card {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 9px 11px;
+  border-color: rgba(255, 210, 130, 0.22);
+  background: rgba(89, 67, 31, 0.22);
+  color: rgba(255, 235, 188, 0.92);
+  cursor: pointer;
+}
+
+.channel-system-event-card small {
+  flex: 0 0 auto;
+  color: rgba(255, 255, 255, 0.48);
+  font-size: 11px;
+}
+
+.channel-profile-card {
+  align-items: stretch;
+}
+
+.channel-profile-modal-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.channel-profile-edit-btn {
+  width: 38px;
+  padding-left: 0;
+  padding-right: 0;
+}
+
+.channel-profile-avatar {
+  --channel-avatar-size: 72px;
+  width: var(--channel-avatar-size);
+  height: var(--channel-avatar-size);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  align-self: center;
+  border-radius: 22px;
+  background: linear-gradient(145deg, rgba(255, 214, 122, 0.22), rgba(56, 41, 22, 0.65));
+  border: 1px solid rgba(255, 226, 155, 0.24);
+  color: rgba(255, 236, 194, 0.95);
+  font-size: calc(var(--channel-avatar-size) * 0.42);
+  font-weight: 700;
+  overflow: hidden;
+}
+
+.channel-profile-avatar img,
+.avatar img {
+  width: 100%;
+  height: 100%;
+  display: block;
+  object-fit: cover;
+}
+
 .deleted-message-pill {
   appearance: none;
   width: 100%;
@@ -4983,8 +5043,19 @@ textarea.input {
 
 .channel-row-title {
   color: #ffffff;
-  font-size: 15px;
-  font-weight: 700;
+  font-size: 17px;
+  font-weight: 800;
+  letter-spacing: 0.01em;
+}
+
+.channel-row-technical {
+  margin: -2px 0 0;
+  color: rgba(255, 255, 255, 0.46);
+  font-size: 11px;
+  line-height: 1.2;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .channel-row-message {